4 - Data Link Control Flashcards Preview

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Flashcards in 4 - Data Link Control Deck (9):
1

What is byte stuffing?

The process of adding 1 extra byte whenever there is a flag or escape character in the text.

2

What is bit stuffing?

Adding one extra 0 when five consecutive 1s appear in the data.

3

What is bit unstuffing?

If five consecutive 1s are followed by a 0, the receiver unstuffs the 0 bit.

4

What is flow control?

Refers to a set of procedures used to restrict the amount of data that the sender can send before waiting for acknowledgement.

5

What is error control?

Based on automatic repeat request, retransmission of data.

6

What are the two protocols used for noiseless channels?

Simplest and Stop-and-Wait.

7

What are the three protocols used for noisy channels?

- Stop-and-Wait ARQ
- Go-Back-N ARQ
- Selective Repeat ARQ

8

What is the send window?

An abstract concept defining an imaginary box of size 2^m - 1 with three variables: Sf, Sn, and Ssize

9

Which is more efficient between Go-Back-N and selective repeat ARQ?

Go-Back-N is more efficient when all transmissions are successful, Selective Repeat ARQ is more successful when there is a large probability of errors