Take Assessment - ENetwork Chapter 11 - CCNA Exploration 2: Routing Protocols and Concepts (Version 4.0) [Oktober 2011]

1.

Refer to the exhibit. What is the cost of the route to the 10.0.0.0 network?

• 2 
• 110 
• 1786 
• 1.544

2. 

Refer to the exhibit. Router1 and Router2 are running OSPF. The show ip ospf neighbor command reveals no neighbors. What is a possible cause? 

• OSPF autonomous system IDs do not match. 
• OSPF process IDs do not match. 
• OSPF network types are identical. 
• OSPF hello or dead timers do not match.

3. 

Refer to the exhibit. When OSPF is operational in the exhibited network, what neighbor relationship is developed between Router1 and Router2? 

• A FULL adjacency is formed. 
• A 2WAY adjacency is formed. 
• Router2 will become the DR and Router1 will become the BDR. 
• Both routers will become DROTHERS.

4. 

Refer to the exhibit. How many OSPF adjacencies must be formed to build the complete topology if a DR or BDR were not elected in this OSPF network? 

• 4 
• 5 
• 6 
• 7 
• 10

5. What does OSPF use to reduce the number of exchanges of routing information in networks where large numbers of neighbors are present? (Choose two.) 

• root router 
• backup root router 
• domain router 
• backup domain router 
• designated router 
• backup designated router

6. 

Refer to the exhibit. All routers are running OSPF. What cost would JAX put in its routing table for the 10.0.0.0/24 network? 

• 2 
• 156 
• 1564 
• 1785 
• 1787

7. 

Refer to the exhibit. What does the "O*E2" from the "O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0/1" line represent? 

• an internal type 2 OSPF route 
• an external OSPF route at least two hops away 
• an external OSPF route from two different sources 
• an external OSPF route that will not increment in cost 
• the route was distributed into OSPF from a type 2 router

8. A fully converged five router OSPF network has been running successfully for several weeks. All configurations have been saved and no static routes are used. If one router looses power and reboots, what information will be in its routing table after the configuration file is loaded but before OSPF has converged? 

• All routes for the entire network will be present. 
• Directly connected networks that are operational will be in the routing table. 
• Because the SPF algorithm has not completed all calculations, no routes will be in the table. 
• A summary route for all previously learned routes will automatically appear in the routing table until all LSPs have been received by the router.

9. 

Refer to the exhibit. Assuming that the routers have default interface OSPF priorities and no configured loopback interfaces, what two roles will router B play on each network segment? (Choose two.) 

• DR for network 192.168.1.200 
• BDR for network 192.168.1.200 
• DROTHER on 192.168.1.200 
• DR for network 192.168.1.204 
• BDR for network 192.168.1.204 
• DROTHER on network 192.168.1.204

10. What is the default administrative distance for OSPF? 

• 90 
• 100 
• 110 
• 115 
• 120

11. 

Refer to the exhibit. What must be received between neighbors to prevent the dead time that is shown in the exhibit from reaching zero? 

• any traffic through the router interfaces 
• routing database updates 
• hello packets 
• BPDU packets

12. 

Refer to the exhibit. Which network command or set of commands will cause OSPF to be enabled for any R1 interface connected to the exhibited subnets? 

• R1(config-router)# network 10.0.0.0 0.0.0.0 area 0 
• R1(config-router)# network 10.1.0.0 0.0.0.255 area 0
  R1(config-router)# network 10.1.1.0 0.0.0.255 area 0
  R1(config-router)# network 10.1.2.4 0.0.0.3 area 0 
• R1(config-router)# network 10.1.0.0 0.0.0.255 area 0
  R1(config-router)# network 10.2.0.0 0.0.0.255 area 0 
• R1(config-router)# network 10.0.0.0 0.0.255.255 area 0

13. What range of networks will be advertised in the OSPF updates by the command Router1(config-router)# network 192.168.0.0 0.0.15.255 area 100? 

• 192.168.0.0/24 through 192.168.0.15/24 
• 192.168.0.0/24 through 192.168.15.0/24 
• 192.168.15.0/24 through 192.168.31.0/24 
• 192.168.15.0/24 through 192.168.255.0/24 
• 192.168.16.0/24 through 192.168.255.0/24

14. 

Refer to the exhibit. All routers have been configured with the interface priorities that are shown. All routers were restarted simultaneously. The results of the DR/BDR election are shown. What can be concluded about this network? 

• Router C cannot win a DR election under any circumstances. 
• If the link for interface 192.168.1.4 goes down, router B will become the new DR. 
• The highest router ID was most likely determined via an OSPF router-id statement or statements. 
• If a new router is added with a higher router ID than router D, it will become the DR.

15. What does OSPF use to calculate the cost to a destination network? 

• bandwidth 
• bandwidth and hop count 
• bandwidth and reliability 
• bandwidth, load, and reliablity

16. 

Refer to the exhibit. Routers A, B, C, and D are all running OSPF with default router IDs and OSPF interface priorities. Loopback interfaces are not configured and all interfaces are operational. Router D is the DR and router C is the BDR.

What happens immediately after the following commands are entered on router A?

A(config)# interface fa0/0

A(config-if)# ip ospf priority 255 

 

• A will become the DR. D will become the BDR. 
• A will become the DR. C will remain the BDR. 
• D will remain the DR. A will become the BDR. 
• D will remain the DR. C will remain the BDR.

17. 

Refer to the exhibit. Which command sequence on RouterB will redistribute a gateway of last resort to the other routers in OSPF area 0? 

• RouterB(config)# router ospf 10
  RouterB(config-router)# gateway-of-last-resort 172.16.6.6 
• RouterB(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0/0 
• RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
  RouterB(config)# router ospf 10
  RouterB(config-router)# default-information originate 
• RouterB(config)# router ospf 10
  RouterB(config-router)# default-network 172.16.6.6 0.0.0.3 area 0 
• RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6 
• RouterB(config)# ip default-route 0.0.0.0 0.0.0.0 172.16.6.6
  RouterB(config)# router ospf 10
  RouterB(config-router)# redistribute ip default-route

18. 

Refer to the exhibit. Router A is correctly configured for OSPF. Which OSPF configuration statement or set of statements was entered for router B to generate the exhibited routing table? 

• B(config-router)# network 192.168.1.0 0.0.0.3 area 0 
• B(config-router)# network 10.16.1.0 0.0.0.224 area 0 
• B(config-router)# network 10.16.1.0 255.255.255.224 area 0 
• B(config-router)# network 192.168.1.0 255.255.255.255 area 0
  B(config-router)# network 10.0.0.0 255.255.255.255 area 0

19. 

Refer to the exhibit. What configuration statements would give the results that are shown in the output of the show ip protocolscommand? 

• B(config)# int fa0/0
  B(config-if)# router-id 192.168.1.5 
• B(config)# int lo0
  B(config-if)# ip address 192.168.1.5 
• B(config)# router ospf 1
  B(config-router)# router-id 192.168.1.5 
• B (config)# router ospf 1
  B(config-router)# ip address 192.168.1.5

20. What three parameters must be indentical between OSPF routers in order to form an adjacency? (Choose three.) 

• area id 
• K-values 
• metric value 
• hello interval 
• network type 
• interface type

21. Which two statements describe the use of OSPF DR/BDR elections? (Choose two.) 

• Elections are always optional. 
• Elections are required in all WAN networks. 
• Elections are required in point-to-point networks. 
• Elections are required in broadcast multiaccess networks. 
• Elections are sometimes required in NBMA networks.

22. 

Refer to the exhibit. The network administrator wants to set the router ID of Router1 to 192.168.100.1. What steps can the administrator take to accomplish this? 

• shut down the loop back interface 
• use the OSPF router-id 192.168.100.1 command 
• use the clear ip ospf process command 
• nothing, the router-id of Router1 is already 192.168.100.1

23. 

Refer to the exhibit. What does the "2" stand for in the router ospf 2 statement? 

• The number 2 is the autonomous system number. 
• The number 2 indicates the number of networks advertised by OSPF. 
• The number 2 identifies this particular instance of OSPF on this router. 
• The number 2 indicates the priority of the OSPF process on this router.

24. 

Refer to the exhibit. The routers in the exhibit are using default OSPF configuration settings to advertise all attached networks. If all of the routers start at the same time, what will be the result of the DR and BDR elections for this single area OSPF network? (Choose three.) 

• HQ will be DR for 10.4.0.0/16. 
• Router A will be DR for 10.4.0.0/16. 
• HQ will be BDR for 10.4.0.0/16. 
• Router A will be DR for 10.5.0.0/16. 
• Remote will be DR for 10.5.0.0/16. 
• Remote will be BDR for 10.5.0.0/16.

25. 

Refer to the exhibit. RouterA, RouterB, and RouterC in the diagram are running OSPF on their Ethernet interfaces. Router D was just added to the network. Routers are configured with the loopback interfaces (Lo 0) that are shown in the exhibit. What happens to the OSPF DR/BDR after RouterD is added to the network? 

• RouterB takes over as DR and RouterD becomes the BDR. 
• RouterD becomes the BDR and RouterA remains the DR. 
• RouterD becomes the DR and RouterA becomes the BDR. 
• RouterC acts as the DR until the election process is complete. 
• RouterD becomes the DR and RouterB remains the BDR. 
• There is no change in the DR or BDR until either current DR or BDR goes down.

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Take Assessment - ENetwork Chapter 10 - CCNA Exploration 2: Routing Protocols and Concepts (Version 4.0) [Oktober 2011]

1.

Refer to the exhibit. When Router D is configured to use a link-state routing protocol and is added to the network, what is the first thing that it does to begin learning the network topology?

• It sends LSP packets to Routers B and C. 
• It sends LSP packets to all routers in the network. 
• It sends Hello packets to all routers in the network. 
• It sends information about its directly connected neighbors to Routers A and E. 
• It sends information about its directly connected neighbors to all routers in the network. 
• It learns about its directly connected networks when its interfaces reach the up state.

2. What two events will cause a link state router to send LSPs to all neighbors? (Choose two.) 

• 30 second timer expires 
• whenever the network topology changes 
• immediately after the Bellman-Ford algorithm has run 
• immediately after the DUAL FSM has built the topology database 
• upon initial startup of router or routing protocol

3. A new network administrator is given the task of selecting an appropriate dynamic routing protocol for a software development company. The company has over 100 routers, uses CIDR and VLSM, requires fast convergence, and uses both Cisco and non-Cisco equipment. Which routing protocol is appropriate for this company? 

• RIP version 2 
• IGRP 
• EIGRP 
• OSPF 
• BGP

4. What two statements correctly describe the link state routing process? (Choose two.) 

• all routers in the area have link state databases 
• each router in the area floods LSPs to all neighbors 
• LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors 
• routing loops are prevented by running the Diffusing Update Algorithm (DUAL) 
• Reliable Transport Protocol (RTP) is the protocol used by for the delivery and reception of LSPs

5. 

Refer to the exhibit. What kind of information would be seen in an LSP sent from router JAX to router ATL? 

• hop count 
• uptime of the route 
• cost of the link 
• a list of all the routing protocols in use

6. What feature do modern link-state protocols provide to minimize processing and memory requirements? 

• splitting routing topologies into smaller areas 
• assigning lower process priorities to route calculations 
• using update timers to restrict routing updates 
• strict split horizon rules to reduce routing table entries

7. To achieve network convergence, what three steps does each link state router take? (Choose three.) 

• use automatic summarization to reduce the size of routing tables 
• build a Link State Packet (LSP) containing the state of each directly connected link 
• flood the LSP to all neighbors, who then store all LSPs received in a database 
• recalculate the number of hops to each network in the routing table 
• construct a complete map of the topology and compute the best path to each destination network 
• use the DUAL FSM to select efficient, loop-free paths, and insert routes into the routing table

8. What speeds up convergence in a network using link-state routing? 

• updates triggered by network changes 
• updates sent at regular intervals 
• updates sent only to directly connected neighbors 
• updates that include complete routing tables

9. Why is it difficult for routing loops to occur in networks that use link-state routing? 

• Each router builds a simple view of the network based on hop count. 
• Routers flood the network with LSAs to discover routing loops. 
• Each router builds a complete and synchronized view of the network. 
• Routers use hold-down timers to prevent routing loops.

10. Of the steps given, what is the final step in the link state routing process? 

• successors are placed into the routing table 
• SPF computes best path to each destination network 
• LSPs are flooded to all neighbors to converge the network 
• DUAL algorithm is run to find best path to destination networks

11. Which algorithm is run by link-state routing protocols to calculate the shortest path to destination networks? 

• DUAL 
• Dijkstra 
• Bellman-Ford 
• Diffie-Hellman

12. 

Refer to the exhibit. Which statement correctly describes the path traffic would take from the 10.0.0.0/24 network to the 192.168.1.0/24 network if a link-state routing protocol was in use? 

• BOS -> ATL because this path is the least hops 
• BOS -> ATL because this path is highest cost 
• BOS -> ORL -> JAX -> ATL because this path is the lowest cost 
• traffic would load balance across all links

13. Which database or table must be identical on all link-state routers within an area in order to construct an accurate SPF tree? 

• routing table 
• adjacency table 
• link-state database 
• neighbor table 
• topology database

14. Which two routing protocols use Dijkstra’s shortest path first algorithm? (Choose two.) 

• RIPv1 
• RIPv2 
• IS-IS 
• BGP 
• EIGRP 
• OSPF

15. When are link-state packets sent to neighbors? 

• every 30 seconds 
• every 180 seconds 
• after the holddown time expires 
• when a link goes up or down 
• when a routing loop occurs

16. What are two advantages of using a link-state routing protocol instead of a distance vector routing protocol? (Choose two.) 

• The topology database eliminates the need for a routing table. 
• Each router independently determines the route to each network. 
• Link-state protocols require less router processor power than distance vector protocols. 
• After the inital LSP flooding, they generally require less bandwidth to communicate changes in a topology. 
• Frequent periodic updates are sent to minimize the number of incorrect routes in the topological database.

17. 

Refer to the exhibit. If all routers and interfaces are configured to use a link-state routing protocol, from which routers will router D receive hello packets? 

• A and E 
• B and C 
• A, B, C, and E 
• C only

18. What action does a link-state router take immediately upon receipt of an LSP from a neighboring router? 

• floods the LSP to neighbors 
• calculates the SPF algorithm 
• runs the Bellman-Ford algorithm 
• computes the best path to the destination network

19. 

Refer to the exhibit. What does JAX do with link-state packets from ORL? 

• sends out its updated routing table to both ORL and BOS routers 
• sends out the individual link-state packets out the interface connected to BOS 
• queries BOS to see if it has a better route 
• only adds it to the local routing table and performs no other actions

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Take Assessment - ENetwork Chapter 9 - CCNA Exploration 2: Network Fundamentals (Version 4.0) [Oktober 2011]

1. The show ip eigrp topology command output on a router displays a successor route and a feasible successor route to network 192.168.1.0/24. In order to reduce processor utilization, what does EIGRP do when the primary route to this network fails?

• The router sends query packets to all EIGRP neighbors for a better route to network 192.168.1.0/24. 
• The DUAL FSM immediately recomputes the algorithm to calculate the next backup route. 
• Packets that are destined for network 192.168.1.0/24 are sent out the default gateway instead. 
• The backup route to network 192.168.1.0/24 is installed in the routing table.

2. 

Refer to the exhibit. What is indicated by the P at the beginning of the topology entry? 

• the route is in a stable state 
• the route is a preferred route 
• DUAL is searching for a better route to this destination 
• the exit interface is in passive mode and EIGRP advertisements are blocked

3. Which of the following statements describes the bounded updates used by EIGRP? 

• Bounded updates are sent to all routers within an autonomous system. 
• Partial updates are sent only to routers that need the information. 
• The updates are sent to all routers in the routing table. 
• Updates are bounded by the routers in the topology table.

4. 

Refer to the exhibit. Which command will advertise the 192.168.1.64/30 network but not the 192.168.1.32 network on router A? 

• network 192.168.1.0 
• network 192.168.1.0 255.255.255.0 
• network 192.168.1.64 0.0.0.3 
• network 192.168.1.64 0.0.0.255

5. 

Refer to the exhibit. In the topology table, what do the numbers 3011840 and 3128695 represent? 

• the route metric that is applied to those EIGRP routes for this router 
• the trustworthiness of the routing information source 
• the composite of the hop count and bandwidth to that destination network 
• the total metric for that network as advertised by the EIGRP neighbor

6. By default, which two metrics are used by EIGRP to determine the best path between networks? 

• MTU 
• load 
• delay 
• bandwidth 
• reliability

7. On a router running EIGRP, what database would maintain a list of feasible successors? 

• routing table 
• neighbor table 
• topology table 
• adjacency table

8. In which of the following tables does the EIGRP DUAL algorithm store the primary route to a destination? (Choose two.) 

• routing 
• topology 
• neighbor 
• path 
• shortest path

9. Which two statements describe characteristics of EIGRP? (Choose two.) 

• EIGRP is a distance vector routing protocol. 
• EIGRP supports classless routing and VLSM. 
• EIGRP is classified as a link-state routing protocol. 
• EIGRP uses TCP for reliable delivery of EIGRP update packets. 
• With EIGRP, loop-free paths are achieved through the use of hold-down timers. 
• EIGRP sends a periodic update every 30 minutes.

10. 

Host 192.168.1.66 in the network illustrated is unable to ping host 192.168.1.130. How must EIGRP be configured to enable connectivity between the two hosts? (Choose two.) 

• R1(config-router)# network 192.168.1.128 
• R1(config-router)# auto-summary 
• R1(config-router)# no auto-summary 
• R2(config-router)# no auto-summary 
• R2(config-router)# auto-summary 
• R2(config-router)# network 192.168.1.64

11. 

Refer to the exhibit. Network 192.168.0.0/28 goes down. What type of packet does Router2 immediately send to Router1 and Router3? 

• a query for network 192.168.0.0/28 
• an acknowledgment packet to 224.0.0.9 
• an update packet that is sent to 255.255.255.255 
• a packet that contains the new routing table for R2 
• unicast update packets to 192.168.1.1 and 192.168.2.1

12. 

Refer to the exhibit. All interfaces have been configured with the bandwidths that are shown in the exhibit. Assuming that all routers are using a default configuration of EIGRP as their routing protocol, what path will packets take from the 172.16.1.0/16 network to the 192.168.200.0/24 network? 

• A,B,E 
• A,C,E 
• A,D,E 
• Packets will load balance across the A,B,E and A,C,E paths. 
• Packets will load balance across the A,B,E and A,D,E paths. 
• Packets will load balance across the A,C,E and A,D,E paths.

13.

Refer to the exhibit. Based on the output of show ip eigrp neighbors, what are two possible problems with adjacencies between Router1 and Router2? (Choose two.) 

• The routers are configured with different EIGRP process IDs. 
• Automatic summarization was disabled. 
• The hello timer for R1 was decreased. 
• The serial interfaces for both routers are in different networks. 
• No feasible successors were found.

14.

Refer to the exhibit. EIGRP is the only routing protocol enabled on this network. No static routes are configured on this router. What can be concluded about network 198.18.1.0/24 from the exhibited output? 

• A route to network 198.18.1.0/24 is not listed in the routing table. 
• Packets that are destined for 198.18.1.0/24 will be forwarded to 198.18.10.6. 
• EIGRP will perform equal cost load balancing across two paths when forwarding packets to 198.18.1.0/24. 
• The router with interface 172.16.3.2 is a successor for network 198.18.1.0/24.

15. What two actions will the EIGRP DUAL FSM take if a link to a network goes down? (Choose two.) 

• put the route into passive mode 
• query neighbors for a new route 
• search routing table for a feasible successor 
• run the SPF algorithm to find a new successor 
• search topology table for a feasible successor

16.

Refer to the exhibit. This is the debug output from 2 directly connected EIGRP routers. They are not forming an adjacency. What is the cause? 

• one router is a non-cisco router 
• they have different autonomous-system numbers 
• they are using difference sequence numbers 
• they are sending incorrect hello types

17. Which term defines a collection of networks under the administrative control of a single entity that presents a common routing policy to the Internet? 

• autonomous system 
• contiguous networks 
• process ID 
• BGP

18.

Refer to the exhibit. The company is using EIGRP with an autonomous system number of 10. Pings between hosts on networks that are connected to router A and those that are connected to router B are successful. However, users on the 192.168.3.0 network are unable to reach users on the 192.168.1.32 network. What is the most likely cause of this problem? 

• IP classless is enabled and is causing the packet to drop. 
• The command network 192.168.1.32 was not issued on router C. 
• The routers are not configured in the same EIGRP routing domain. 
• Automatic summarization of the networks is causing the subnetted routes to be dropped.

19. What information is maintained in the EIGRP topology database for a destination route? (Choose two.) 

• the highest cost of the route 
• the SRTT value for the route 
• the feasible distance of the route 
• the physical address of the gateway interface 
• the route cost as advertised by the neighboring router

20. In the command router eigrp 20, what is the purpose of the number 20? 

• specifies the administrative distance for all EIGRP routes 
• identifies the autonomous system number this EIGRP process will advertise 
• determines what metric is added to all advertised routes 
• indicates the number of addresses in the EIGRP routing domain

21. What administrative distance would a router assign to a default route in EIGRP that is learned from a source external to the autonomous system? 

• 1 
• 5 
• 70 
• 90 
• 170 
• 190

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Take Assessment - ENetwork Chapter 8 - CCNA Exploration 2: Network Fundamentals (Version 4.0) [Oktober 2011]

1.

Refer to the exhibit. What can be determined from this output?

• The router will have to perform recursive lookups to forward a packet destined for 192.168.2.213/24. 
• The parent route for these networks was removed from the routing table. 
• A route to 192.168.0.0/25 would be classified as a supernet route for the routes listed in the routing table. 
• All of the routes listed are network routes.

2. 

Refer to the exhibit. A packet destined for host 128.107.0.5/16 is processed by the JAX router. After finding the static route in the routing table that matches the destination network for this packet, what does the router do next? 

• searches for a default route to forward the packet 
• drops the packet since the static route does not have an exit interface 
• performs a recursive lookup to find the exit interface used to forward the packet 
• sends a request to neighboring routers for the location of the 128.107.0.0 network

3. 

Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1? 

• 172.16.0.0/16 
• 172.16.0.0/24 
• 172.16.0.0/30 
• 172.16.1.0/16 
• 172.16.1.0/24

4. The following entry is displayed in the routing table: 

R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1 

What type of route is this? 

• a level 1 parent route 
• a level 1 supernet route 
• a level 1 ultimate network route 
• a level 2 child route 
• a level 2 ultimate child route

5. 

Refer to the exhibit. Router1 is running IOS version 12.2. What will the network administrator need to do so that packets for unknown child routes of 172.16.0.0/24 will not be dropped? 

• issue the ip default-network command 
• use a classful routing protocol such as RIPv1 
• enable either OSPF or ISIS as the routing protocol 
• issue the ip classless command 
• do nothing, ip classless is on by default

6. 

Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do? 

• drop the packet 
• use the default route 
• forward the packet via the route to 10.16.1.0 
• forward the packet via the route to 10.16.1.64

7. 

Refer to the exhibit. How many routes in this output qualify for use as ultimate routes? 

• 3 
• 4 
• 5 
• 6 
• 7 
• 8

8. 

Refer to the exhibit. With the ip classless command issued, what will router R2 do with a packet destined for host 172.16.4.234? 

• drop the packet 
• send packet out Serial 0/0/1 
• send packet to network 0.0.0.0 
• send packet out FastEthernet 0/0

9. 

Refer to the exhibit. The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being dropped by Router2. What command should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1? 

• ip classless 
• no ip classless 
• ip default-network 0.0.0.0 
• ip default-gateway 172.16.254.1 
• ip route 0.0.0.0 0.0.0.0 Serial 0/0/1

10. 

Refer to the exhibit. Router1 has been issued the ip classless command. What happens to packets destined to host 172.16.3.10? 

• they are dropped 
• sent to default gateway 
• forward out interface Serial0/0/1 
• forward out interface FastEthernet 0/0

11. A network is converged and the routing tables are complete. When a packet needs to be forwarded, what is the first criterion used to determine the best path in the routing table? 

• the route with the highest bandwidth 
• the route with the smallest Administrative Distance 
• the route with the longest address and mask match to the destination 
• the route with the best combination of Administrative Distance and lowest cost

12. What determines if the router implements a classless route lookup process? 

• Child routes are present in the routing table. 
• The command ip classless is enabled on the router. 
• A classless routing protocol has been configured on the router. 
• Routing table entries have a next-hop IP address and an exit interface for each child route.

13. What occurs when no ip classless is implemented on the router? 

• The router will only support classful IP addressing. 
• The router will only support classful routing protocols. 
• The router will use a default route, if present, when a matching route is not found in the routing table. 
• The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.

14. 

Refer to the exhibit. The graphic contains partial contents of the routing table on router E. Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router E receives a packet to forward. Which route in the routing table will be searched first and why? 

• 172.16.1.0/25 because it is the first ultimate route 
• 0.0.0.0/0 because it is the lowest network number 
• 172.16.0.0/25 because it is the first level 1 route 
• 172.18.0.0/16 because it has the shortest mask

15. 

Refer to the exhibit. Which statement correctly describes this network? 

• EIGRP is being used 
• There is at least one parent and one child route 
• 192.168.2.0, 192.168.3.0, and 192.168.4.0 networks are child routes 
• Traffic going to 172.16.3.0 will be directed to s 0/0/1

16. 

Refer to the exhibit. What subnet mask will Router1 apply to child routes of the 172.16.0.0/24 network? 

• 0.0.0.0 
• 255.255.0.0 
• 255.255.255.0 
• 255.255.255.255

17. 

Refer to the exhibit. What protocol was used to distribute the routing information for the network 172.16.1.4? 

• RIPv1 
• RIPv2 
• EIGRP 
• OSPF

18. A route to a destination network is learned from multiple routing protocols. If each learned route has the same network prefix, what is used by a Cisco router to select the preferred route to the destination that will be installed in the routing table? 

• metric 
• route prefix 
• update timer 
• administrative distance

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Take Assessment - ENetwork Chapter 7 - CCNA Exploration 2: Network Fundamentals (Version 4.0) [Oktober 2011]

1.

Refer to the exhibit. If all routers are running RIP version 2, why is there no route for the 192.168.1.32/27 network?

• Rip version 2 does not send subnet masks in its updates. 
• Router A is not setup with RIP as a routing protocol. 
• Rip version 2 will auto summarize routes by default. 
• Router B is not setup to advertise the 192.168.1.64/30 network.

2. 

Refer to the exhibit. Which command on which router will allow Router1 to learn about the 192.168.0.0/20 network? 

• Router1(config)# ip classless 
• Router1(config-router)# no passive-interface serial 0/1/1 
• Router2(config-router)# version 2 
• Router2(config-router)# neighbor 10.0.0.2

3. What are two reasons to implement RIP version 2 rather than RIP version 1? (Choose two.) 

• RIP version 2 supports VLSM. 
• RIP version 2 supports more than 16 routers. 
• RIP version 2 supports classful (and not classless) routing 
• RIP version 2 supports routing update authentication. 
• RIP version 2 supports multi-areas. 
• RIP version 2 uses the Dijkstra algorithm rather than the Bellman-Ford algorithm.

4. How are RIP v1 and RIP v2 similar to one another? (Choose three.) 

• They both use hop count as a metric. 
• They both have the same metric value for infinite distance. 
• They both use a broadcast IP address to send updates to their neighbors. 
• They both send subnet mask information in their updates. 
• They both provide for authentication of update sources. 
• They both use split horizon to prevent routing loops.

5. 

Refer to the exhibit. Routers East and West are configured using RIPv1. Both routers are sending updates about their directly connected routes. The East router can ping the West router serial interface and West can ping the serial interface of East. However, neither router has dynamically learned routes from the other. What is most likely the problem? 

• A gateway of last resort is required. 
• Subnetting is not supported by RIPv1. 
• VLSM is not supported by RIPv1. 
• One of the routers needs a clock rate on the serial interface.

6. 

Refer to the exhibit. Which command will allow Router2 to learn about the 192.168.16.0/28 network? 

• Router1(config)# ip classless 
• Router1(config-router)# network 192.168.16.0 
• Router1(config-router)# no passive-interface serial 0/1/1 
• Router2(config-router)# version 2 
• Router2(config-router)# neighbor 10.0.0.2

7. 

Refer to the exhibit. All routers are running RIP version 2. JAX is configured to just advertise the 10.0.0.0/24 network. CHI is configured to advertise the 172.16.0.0/16 network. A network administrator enters the commands shown in the exhibit. What changes will occur in this network? 

• The JAX router will ignore updates for the 172.16.0.0/16 network due to split horizon issues. 
• The CHI router will install a route to the 192.168.0.0/16 network in its routing table. 
• The routing table for CHI will have the 192.168.0.0/16 route but it will have an S next to the route. 
• The ORL router will apply a 255.255.0.0 subnet mask to all networks in the routing updates it forwards.

8. 

Refer to the exhibit. A technician needs to add a new loopback interface to test routing functionality and network design. The technician enters the following set of commands on the router: 

Sanford(config)# interface loopback1

Sanford(config-if)# ip address 192.168.6.62 255.255.255.252

Why does the router respond with an error? 

• The router does not allow loopback interface configurations. 
• This mask can not be used with this class of addresses. 
• Classless routing must be configured before this address can be added. 
• The network address for Loopback1 overlaps with an already configured interface address. 
• The router is over the limit for the maximum paths that can be provided in the routing table.

9. What is the maximum network diameter permitted by the default metric of RIPv2? 

• 15 hops 
• 16 hops 
• 100 hops 
• 120 hops 
• 255 hops

10. What are two functions of the network command used when configuring routing protocols? (Choose two.) 

• identifies which networks will be included in the routing updates 
• identifies the hosts addresses that can be summarized in the network 
• used to list all addresses for remote and local networks 
• determines which subnet mask to apply to routing updates 
• determines which interfaces can send and receive routing updates

11. 

Refer to the exhibit. What can be concluded from the output shown in the exhibit? 

• The routing table is limited to 2 routes. 
• The LAN interfaces are participating in the routing process. 
• One update has been sent out of each serial interface and 2 have been received. 
• The no auto-summary has not been configured on this router.

12. A network administrator has been told that the company IP address infrastructure must adhere to RFC 1918. What three IP address ranges from RFC 1918 could the administrator use on the network? (Choose three.) 

• 10.0.0.0/8 
• 127.0.0.0/8 
• 169.254.0.0/16 
• 172.16.0.0/12 
• 192.168.0.0/16 
• 209.165.201.0/27

13. 

Refer to the exhibit. All routers are running RIPv1. What changes will occur in the routing table of router B if a loopback interface with an address of 10.16.1.129/27 is configured on router B? 

• Routes to the 10.16.1.0/27, 10.16.1.64/27, and 10.16.1.128/27 networks are added. 
• A connected route to the 10.16.1.128/27 network is added. 
• A third route to the 10.0.0.0/8 network with RIPv1 as the source is added. 
• The 10.0.0.0/8 route is dropped immediately from the routing table after router B is configured.

14. A network administrator installed four new routers that are running RIPv2. Router1 is a boundary router in the RIPv2 network and has a default route configured. Once the network has converged, the network administrator enters Router1(config-router)# default-information originate on Router1. How will this affect the network? 

• prevents Router1 from forwarding updates about networks that are not directly connected 
• causes all routers in the network to synchronize routing updates with Router1 
• forces Router1 to become the primary or designated router (DR) for updates 
• propagates the default route to all routers in the network

15. 

Refer to the exhibit. The exhibited network contains a mixture of Cisco and non-Cisco routers. The command debug ip rip was entered on the JAX router. All routers are running the same version of RIP. Router CHI and Router ORL are not able to reach the 192.168.1.16/28 network. What is a possible solution to this problem? 

• Enable split horizon in the network. 
• Configure RIPv2 on routers. 
• Add network 192.168.1.0 to the RIP configuration on the JAX router. 
• Configure JAX Fa0/0 as a passive interface. 
• Enable the Serial0/0/0 interface on the JAX router. 
• Change the IP address on the Fa0/0 interface of the JAX router to 192.168.1.1/24.

16. What field was added to the RIP message header by RFC 1723 to add support for VLSM and CIDR? 

• subnet mask 
• destination port number 
• address family identifier 
• source and destination IP addresses

17. 

Refer to the exhibit. What effect will the commands that are shown have on RIP updates for Router1? 

• Only version 2 updates are sent to 255.255.255.255. 
• Only version 2 updates are sent to 224.0.0.9. 
• Both version 1 and version 2 updates are sent to 224.0.0.9. 
• Both version 1 and version 2 updates are sent to 255.255.255.255.

18. 

Refer to the exhibit. RIPv1 is configured as the routing protocol for the network that is shown. The following commands are used on each router:

router rip

network 10.0.0.0

network 172.16.0.0

When this configuration is complete, users on the LAN of each router are unable to access the remote LANs. Why? 

• The network statements are configured incorrectly. 
• A routing loop has been created. 
• RIPv1 is unable to route to discontiguous subnets of a major network. 
• RIPv1 is unable to route networks with a /24 subnet mask.

19. RIPv2 is the configured routing protocol on the routers in a network. The command Router(config-router)# no version 2 is entered on the routers. What effect does entering this command have on routing updates? 

• Subnet masks will be added to the routing updates. 
• Routing updates will be sent out using multicast address 224.0.0.9. 
• Version 1 and 2 updates will be received and the version 2 updates will not be sent. 
• The RIP routing process will be removed from the router and routing updates will not be forwarded.

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