1. In ARQ, a NAK is sent by the recipient if the message was received incorrectl

Question

1. In ARQ, a NAK is sent by the recipient if the message was received incorrectlY? True/False
2. Distance vector routing finds the quickest, least busy route to take?
True/False
3. In an Ethernet frame, the frame check sequence (FCS) (or CRC-32) field provides erro detection?
True/False
4. Which of the following is not an error pervention technique?
A- CRC
B- Lower the transmission speed
C- All are erro prevention techniques
D- Shielding
5- In which type of modulation is the height of the wave changed?
A- Frequency
B- Phase
C- Amplitude
D- PCM

Explanation / Answer

2. True, The distance vector routing algorithm find the shortest path.

3. True, In an Ethernet frame, the frame check sequence filed provide to detect errors by using CRC,

4. A) CRC is not error prevention technic; it is error detection technique.

5. C) Amplitude type of modulation is the height of the wave changed.

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