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ENetwork Chapter 8 - CCNA Exploration (Version 4.0)  

2009-03-31 14:01:08|  分类: ccna1 |  标签: |举报 |字号 订阅

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Exam Viewer - ENetwork Chapter 8 - CCNA Exploration (Version 4.0)
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Below you will find the assessment items as presented on the exam as well as the scoring rules associated with the item.

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1 Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
 
 Presentation 
 Transport 
 Data Link 
 =Physical 
 

 

Scoring Rule For:  correctness of response
2 points for Option 4
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.1.1 Physical Layer - Purpose
 

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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 2
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.8 Media Connectors
 

3 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. 
 

 

Scoring Rule For:  correctness of response
Option 1 and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required. 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.6 Fiber Media
 

4 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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.3 Unshielded Twisted Pair (UTP) Cable
 

5

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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.3 Unshielded Twisted Pair (UTP) Cable
 

6 Which method of signal transmission uses radio waves to carry signals?
 
 electrical 
 optical 
 =wireless 
 acoustic 
 

 

Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.7 Wireless Media
 

7 In most business LANs, which connector is used with twisted-pair networking cable?
 
 BNC 
 RJ-11 
 =RJ-45 
 Type F 
 

 

Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.8 Media Connectors
 

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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 4
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.6 Fiber Media
 

9 Which type of cable run is most often associated with fiber-optic cable?
 
 =backbone cable 
 horizontal cable 
 patch cable 
 work area cable 
 

 

Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.6 Fiber Media
 

10 What are three measures of data transfer? (Choose three.)
 
 =goodput 
 frequency 
 amplitude 
 =throughput 
 crosstalk 
 =bandwidth 
 

 

Scoring Rule For:  correctness of response
Option 1, Option 4, and Option 6 are correct.
1 point for each correct option.
0 points if more options are selected than required. 
Max Value = 3
 

This item references content from the following areas:
CCNA Exploration
8.2.3 Data Carrying Capacity
 

11 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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.3 Unshielded Twisted Pair (UTP) Cable
 

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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.1.1 Physical Layer - Purpose
 

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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 2
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.6 Fiber Media
 

14 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. 
 

 

Scoring Rule For:  correctness of response
2 points for Option 2
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.8 Media Connectors
 

15 Which fiber connector supports full duplex Ethernet?
 
 

 
 

 
 

 
 

 
 

 

Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.8 Media Connectors
 

16 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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.7 Wireless Media
 

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 
 

 

Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option 
Max Value = 2
 

This item references content from the following areas:
CCNA Exploration
8.3.3 Unshielded Twisted Pair (UTP) Cable
 

 
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