Exam C
QUESTION 1
What is the most common cable used today?
A. UTP
B. STP
C. Coaxial
D. Fiber
Correct Answer: A
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: Unshielded twisted-pair (UTP) is the cable most commonly used in local area networks. It’s
relatively easy to work with, flexible, efficient, and fast.
QUESTION 2
If you are making a crossover cable and one end is 568A, what should the other end be?
A. 568A
B. 568B
C. 568C
D. BOGB
Correct Answer: B
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: Crossover cable is used to connect like devices to each other—for example, a computer to
another computer, or a switch to another switch. With the crossover cable, the patch cable is wired with the
568B standard on one side and the 568A standard on the other.
QUESTION 3
If you want to connect a computer directly to another computer without using a switch, you use a __________.
A. straight-through cable
B. crossover cable
C. laplink cable
D. rollover cable
Correct Answer: B
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: A crossover cable is used to connect like devices to directly each other.
QUESTION 4
You need to connect a twisted-pair cable to the back of a patch panel. What tool should you use?
A. punch-down tool
B. zip tool
C. wire wedge
D. soldering iron
Correct Answer: A
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: The tools necessary to make the connections between patch panels and RJ45 jacks include a
cutting tool, a wire stripper, a punch-down tool, and a continuity tester.
QUESTION 5
What is the minimum category of twisted-pair cable you need to support 100 Mbps?
A. Category 3
B. Category 5
C. Category 5e
D. Category 6
Correct Answer: B
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: Twisted-pair cables are categorized according to the frequency at which they transmit signals and
their data transfer rate or speed. To support 100 Mbps, you need to use a minimum of category 5. The
maximum length is 100 m.
QUESTION 6
When you pick up your wireless phone, your computer drops network connectivity. What could be the cause of
the problem?
A. EMI
B. RFI
C. network adapter failure
D. cable failure
Correct Answer: B
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: Wireless adapters/networks use 2.4 or 5.0 GHz, which is the same frequency that wireless phones
use. Therefore, if both operate at the same time, you have radio frequency interference (RFI).
QUESTION 7
You are setting up a network within a warehouse using Category 6 UTP. However, parts of the network are
down because of the heavy machinery used. What cable type should you use?
A. STP
B. coaxial
C. fiber
D. plenum-rated
Correct Answer: C
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: Electromagnetic interference (EMI) is a disturbance that can affect electrical circuits, devices, and
cables due to electromagnetic conduction and possibly radiation. To overcome this, you should use fiber
cabling, which uses light instead of electrical signals.
QUESTION 8
What do you call it when electrical signals jump to another set of wires?
A. EMI
B. RFI
C. crosstalk
D. jumpitis
Correct Answer: C
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: A common type of interference is crosstalk, in which the signal that is transmitted on one copper
wire or pair of wires creates an undesired effect on another wire or pair of wires.
QUESTION 9
What type of cable should be used as part of a fire code for a building?
A. STP
B. PVC
C. heat protected
D. plenum-rated
Correct Answer: D
Section: Understanding Wired and Wireless Networks
Explanation
Explanation/Reference:
Section Reference: Identifying and Working with Twisted-Pair Cable
Explanation: Cables that are installed inside walls or above drop ceilings where they cannot be accessed by
sprinkler systems in the case of a fire should be plenum-rated or low-smoke rated. Plenum-rated cables have a
Teflon coating that makes them more impervious to fire.
QUESTION 10
Which of the following is not a fiber connector?
A. FC
B. LC
C. RJ-45
D. MT-RJ
Correct Answer: C
Section: Understanding Wired and Wireless