Analog Communications Mock Test 7

10%

Question 1 of 10

1. Which layer is used for detection of bad frames in wide area network?

physical layer

session layer

link layer

frame layer

Question 1 of 10

Question 2 of 10

2. What is the full form of SDLC?

Synchronous Data Link Control

Synchronous Data Line Character

Synchronous Data Link Character

Synchronous Data Line Control

Question 2 of 10

Question 3 of 10

3. Mostly LANs are based on Ethernet.

True

False

Question 3 of 10

Question 4 of 10

4. Ground waves are most effective when _________

usually in the UHF range

it is at microwave frequencies

it is above about 20MHZ

it is below about 3MHz

Question 4 of 10

Question 5 of 10

5. The effect of frequency on the resistance of a wire is called ________

skin effect

ohmic effect

threshold effect

I2R loss

Question 5 of 10

Question 6 of 10

6. Which modulation is used in high frequency radio-teletype systems?

QAM

PSK

FSK

ASK

Question 6 of 10

Question 7 of 10

7. Which term is used for moving PCM samples from one time slot to another?

space switching

phase switching

time switching

frequency switching

Question 7 of 10

Question 8 of 10

8. MAN stands for ________

Multiple Access Network

Metropolitan Access Network

Multiple Area Network

Metropolitan Area Network

Question 8 of 10

Question 9 of 10

9. When two PCs send data over a baseband network cable at the same time, it is called ________

excess traffic

switching

collision

contention

Question 9 of 10

Question 10 of 10

10. When calculating the maximum number of users, limiting factor in FDM is ___________

type of each signal

bandwidth of each signal

amplitude of each signal

length of the channel

Question 10 of 10