CCNA Ch. 4 Physical Layer 001
EMI, RFI
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 - rollover, 2 - straight-through, 3 - crossover
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?
The untwisted length of each wire is too long.
Refer to the exhibit. What is wrong with the displayed termination?
to distinguish data bits from control bitsto identify where the frame starts and ends
What are two reasons for physical layer protocols to use frame encoding techniques? (Choose two.)
the measure of the bits transferred across the media over a given period of time
What is indicated by the term throughput?
It is able to carry signals much farther than copper cabling.
What is one advantage of using fiber optic cabling rather than copper cabling?
twisting the wires together into pairs
What technique is used with UTP cable to help protect against signal interference from crosstalk?
the distortion of the transmitted messages from signals carried in adjacent wires
Which characteristic describes crosstalk?
RJ-45
Which type of connector does a network interface card use?
They allow for full-duplex connectivity.
Why are two strands of fiber used for a single fiber optic connection?
