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Question 1
Refer to the exhibit. Which statement describes the media access control methods that are used by the networks in the exhibit?
A. All three networks use CSMA/CA
B. None of the networks require media access control.
C. Network 1 uses CSMA/CD and Network 3 uses CSMA/CA.
D. Network 1 uses CSMA/CA and Network 2 uses CSMA/CD.
E. Network 2 uses CSMA/CA and Network 3 uses CSMA/CD.
Correct answer: C
Question 2
As data travels on the media in a stream of 1s and 0s how does a receiving node identify the beginning and end of a frame?
A. The transmitting node inserts start and stop bits into the frame.
B. The transmitting node sends a beacon to notify that a data frame is attached.
C. The receiving node identifies the beginning of a frame by seeing a physical address.
D. The transmitting node sends an out-of-band signal to the receiver about the beginning of the frame.
Correct answer: A
Question 3
What is a role of the Logical Link Control sublayer?
A. to provide data link layer addressing
B. to provide access to various Layer 1 network technologies
C. to define the media access processes performed by network hardware
D. to mark frames to identify the network layer protocol being carried
Correct answer: D
Question 4
What is the function of the CRC value that is found in the FCS field of a frame?
A. to verify the integrity of the received frame
B. to verify the physical address in the frame
C. to verify the logical address in the frame
D. to compute the checksum header for the data field in the frame
Correct answer: A
Question 5
What are two examples of hybrid topologies? (Choose two.)
A. point-to-point
B. partial mesh
C. extended star
D. hub and spoke
E. full mesh
Correct answer: BC
Question 6
The throughput of a FastEthernet network is 80 Mb/s. The traffic overhead for establishing sessions, acknowledgments, and encapsulation is 15 Mb/s for the same time period. What is the goodput for this network?
A. 15 Mb/s
B. 95 Mb/s
C. 55 Mb/s
D. 65 Mb/s
E. 80 Mb/s
Correct answer: D
Question 7
How is the magnetic field cancellation effect enhanced in UTP cables?
A. by increasing the thickness of the PVC sheath that encases all the wires
B. by increasing and varying the number of twists in each wire pair
C. by increasing the thickness of the copper wires
D. by decreasing the number of wires that are used to carry data
Correct answer: B
Question 8
Which statement is correct about multimode fiber?
A. Multimode fiber cables carry signals from multiple connected sending devices.
B. Multimode fiber commonly uses a laser as a light source.
C. SC-SC patch cords are used with multimode fiber cables.
D. Multimode fiber has a thinner core than single-mode fiber.
Correct answer: C
Question 9
What is one main characteristic of the data link layer?
A. It generates the electrical or optical signals that represent the 1 and 0 on the media.
B. It converts a stream of data bits into a predefined code.
C. It shields the upper layer protocol from being aware of the physical medium to be used in the communication.
D. It accepts Layer 3 packets and decides the path by which to forward a frame to a host on a remote network.
Correct answer: C
Question 10
What are two characteristics of 802.11 wireless networks? (Choose two.)
A. They use CSMA/CA technology.
B. They use CSMA/CD technology.
C. They are collision-free networks.
D. Stations can transmit at any time.
E. Collisions can exist in the networks.
Correct answer: AE
Conclusion
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