Kunci Jawaban CCNA1 Chapter 4 Exam v5 1 2015
CCNA1 Chapter 4 Exam (v5.1)
Update Nvember 6 , 2015 By Abim
CCNA1 Chapter 4 Exam Answer v5.1 2015
1. What are two reasons for physical layer protocols to use frame encoding techniques? (Choose two.)
· to reduce the number of collisions on the media
· to distinguish data bits from control bits
· to provide better media error correction
· to identify where the frame starts and ends
· to increase the media throughput
2. What is indicated by the term throughput?
· the guaranteed data transfer rate offered by an ISP
· the capacity of a particular medium to carry data
· the measure of the usable data transferred across the media
· the measure of the bits transferred across the media over a given period of time
· the time it takes for a message to get from sender to receiver
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.)
· EMI
· crosstalk
· RFI?
· signal attenuation
· extended length of cabling
4. Which characteristic describes crosstalk?
· the distortion of the network signal from fluorescent lighting
· the distortion of the transmitted messages from signals carried in adjacent wires
· the weakening of the network signal over long cable lengths
· the loss of wireless signal over excessive distance from the access point
5. What technique is used with UTP cable to help protect against signal interference from crosstalk?
· twisting the wires together into pairs
· wrapping a foil shield around the wire pairs
· encasing the cables within a flexible plastic sheath
· terminating the cable with special grounded connectors
6. Refer to the exhibit. The PC is connected to the console port of the switch. All the other connections are made through FastEthernet links. Which types of UTP cables can be used to connect the devices??
CCNA1 Chapter 4 v5.1 002
· 1 – rollover, 2 – crossover, 3 – straight-through
· 1 – rollover, 2 – straight-through, 3 – crossover
· 1 – crossover, 2 – straight-through, 3 – rollover
· 1 – crossover, 2 – rollover, 3 – straight-through
7. Refer to the exhibit. What is wrong with the displayed termination?
CCNA1 Chapter 4 v5.1 003
· The woven copper braid should not have been removed.
· The wrong type of connector is being used.
· The untwisted length of each wire is too long.
· Get
