CCNA TEST PAPER 7 WITH ANSWERS V5-1 & V6-0


1 What are two services performed by the data link layer of the OSI model? (Choose two.)
  • 1. It encrypts data packets.
  • 2. It determines the path to forward packets.
  • 3. It accepts Layer 3 packets and encapsulates them into frames.
  • 4. It provides media access control and performs error detection.
  • 5. It monitors the Layer 2 communication by building a MAC address table.
ANSWER:3&4
2 Why are two strands of fiber used for a single fiber optic connection?
  • 1. The two strands allow the data to travel for longer distances without degrading.
  • 2. They prevent crosstalk from causing interference on the connection.
  • 3. They increase the speed at which the data can travel.
  • 4. They allow for full-duplex connectivity.
ANSWER:4

3 A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.)
  • 1. EMI
  • 2. crosstalk
  • 3. RFI
  • 4. signal attenuation
  • 5. extended length of cabling
ASNWER:1&3

4 What is one advantage of using fiber optic cabling rather than copper cabling?
  • 1. It is usually cheaper than copper cabling.
  • 2. It is able to be installed around sharp bends.
  • 3. It is easier to terminate and install than copper cabling.
  • 4. It is able to carry signals much farther than copper cabling.
ANSWER: 4

5 What technique is used with UTP cable to help protect against signal interference from crosstalk?
  • 1. twisting the wires together into pairs
  • 2. wrapping a foil shield around the wire pairs
  • 3. encasing the cables within a flexible plastic sheath
  • 4. terminating the cable with special grounded connectors
ANSWER:1
6 Which characteristic describes crosstalk?
  • 1. the distortion of the network signal from fluorescent lighting
  • 2. the distortion of the transmitted messages from signals carried in adjacent wires
  • 3. the weakening of the network signal over long cable lengths
  • 4. the loss of wireless signal over excessive distance from the access point
ANSWER:2
7 Which method of data transfer allows information to be sent and received at the same time?
  • 1. full duplex*
  • 2. half duplex
  • 3. multiplex
  • 4. simplex
ANSWER: 1

8 What is indicated by the term throughput?
  • 1. the guaranteed data transfer rate offered by an ISP
  • 2. the capacity of a particular medium to carry data
  • 3. the measure of the usable data transferred across the media
  • 4. the measure of the bits transferred across the media over a given period of time
  • 5. the time it takes for a message to get from sender to receiver
ANSWER:4

9 A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.)
  • 1. mobility options
  • 2. security
  • 3. interference
  • 4. coverage area
  • 5. extensive cabling
  • 6. packet collision
ANSWER:2,3&4
10 What are two reasons for physical layer protocols to use frame encoding techniques? (Choose two.)
  • 1. to reduce the number of collisions on the media
  • 2. to distinguish data bits from control bit
  • 3.  to provide better media error correction
  • 4.  to identify where the frame starts and ends
  • 5.  to increase the media throughput
ANSWER:2&4

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