Take Assessment - ENetwork Chapter 8 - CCNA Exploration 1: Network Fundamentals (Version 4.0) [Oktober 2011]

1. Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?

• Presentation 
• Transport 
• Data Link 
• Physical

2. An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device? 

• light injector 
• OTDR 
• TDR 
• multimeter

3. 

Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B? 

• coax cable 
• rollover cable 
• crossover cable 
• straight-through cable

4. Which fiber connector supports full duplex Ethernet?

•  
• 
•  option 3
• 

 5. With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs? 

• the magnetic field around the adjacent pairs of wire 
• the use of braided wire to shield the adjacent wire pairs 
• the reflection of the electrical wave back from the far end of the cable 
• the collision caused by two nodes trying to use the media simultaneously

6. Which method of signal transmission uses radio waves to carry signals? 

• electrical 
• optical 
• wireless 
• acoustic

7. In most business LANs, which connector is used with twisted-pair networking cable? 

• BNC 
• RJ-11 
• RJ-45 
• Type F

8. Which of the following is a characteristic of single-mode fiber-optic cable? 

• generally uses LEDs as the light source 
• relatively larger core with multiple light paths 
• less expensive than multimode 
• generally uses lasers as the light source

9. Which type of cable run is most often associated with fiber-optic cable? 

• backbone cable 
• horizontal cable 
• patch cable 
• work area cable

10. What are three measures of data transfer? (Choose three.) 

• goodput 
• frequency 
• amplitude 
• throughput 
• crosstalk 
• bandwidth

11. What is considered a benefit of wireless as a media choice? 

• more host mobility 
• lower security risks 
• reduced susceptibility to interference 
• less impact of the surroundings on the effective coverage area

12. What is a primary role of the Physical layer in transmitting data on the network? 

• create the signals that represent the bits in each frame on to the media 
• provide physical addressing to the devices 
• determine the path packets take through the network 
• control data access to the media

13. In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling? 

• coax 
• fiber 
• Cat5e UTP 
• Cat6 UTP 
• STP

14. Which characteristics describe fiber optic cable? (Choose two.) 

• It is not affected by EMI or RFI. 
• Each pair of cables is wrapped in metallic foil. 
• It combines the technique of cancellation, shielding and twisting to protect data. 
• It has a maximum speed of 100 Mbps. 
• It is the most expensive type of LAN cabling.

15. What is a possible effect of improperly applying a connector to a network cable? 

• Data will be forwarded to the wrong node. 
• Data transmitted through that cable may experience signal loss. 
• An improper signaling method will be implemented for data transmitted on that cable. 
• The encoding method for data sent on that cable will change to compensate for the improper connection.

16. When is a straight-through cable used in a network? 

• when connecting a router through the console port 
• when connecting one switch to another switch 
• when connecting a host to a switch 
• when connecting a router to another router

17. What characteristic of UTP cable helps reduce the effects of interference? 

• the metal braiding in the shielding 
• the reflective cladding around core 
• the twisting of the wires in the cable 
• the insulating material in the outer jacket

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