Colaborativo 4 Cisco

[pic]CCNA CISCO ANSWERS
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ENetwork v4.0 Chapter 8
Posted by Santhosh Kumar Sunday, December 14, 2008
Expect minimum percentage: 94.3%

1) What are the five elements that make upthe fiber-optic cable?
ans:
core, cladding, buffer, strength material, and outer jacket

2) In a UTP crossover cable, which pairs of pins are crossed? (Choose two.)
ans:
1 and 2
3 and 6

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

4) Which of the following is a characteristic ofsingle-mode fiber-optic cable?
ans:
generally uses lasers as the light source

5) Which method of signal transmission uses radio waves to carry signals?
ans:
wireless

6) Which characteristicsdescribe fiber optic cable? (Choose two.)
ans:
It is not affected by EMI or RFI.
It is the most expensive type of LAN cabling.

7) When is a straight-through cable used in a network?
ans:
whenconnecting a host to a switch

8) Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
ans:
Physical

9) In most business LANs,which connector is used with twisted-pair networking cable?
ans:
RJ-45

10) What encoding scheme does 100 Mbps Fast Ethernet use?
ans:
4B/5B

11) An installed fiber run can be checked forfaults, integrity, and the performance of the media by using what device?
ans:
OTDR

12) In which of the following situations would a crossover cable be used? (Choose two.)
ans:
router to PC
switchto hub

13) Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
ans:
Physical

14) What is a possible effect of improperlyapplying a connector to a network cable?
ans:
The encoding method for data sent on that cable will change to compensate for the improper connection.

15) Which characteristics describe fiber...