11.Data Link Control

In Go-Back-N ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the receive window must be _______.

• 1
• 15
• 16
• 31

In Go-Back-N ARQ, if frames 4, 5, and 6 are received successfully, the receiver may send an ACK _______ to the sender.

• 6
• 7
• 5
• any of the above

The Stop-And-Wait ARQ, Go-Back-N ARQ, and the Selective Repeat ARQ are for ______ channels.

• noiseless
• noisy
• either (a) or (b)
• neither (a) nor (b)

The _________Protocol, adds a simple error control mechanism to the _______Protocol.

• Selective Repeat ARQ; Go-Back-N ARQ
• Go-Back-N ARQ; Stop-and-Wait
• Stop-and-Wait ARQ; Stop-and-Wait
• none of the above

In PPP, the ________ is responsible for establishing, maintaining, configuring, and terminating links.

• PAP
• CHAP
• LCP
• NCP

HDLC is an acronym for _______.

• Half-duplex digital link combination
• Host double-level circuit
• High-duplex line communication
• High-level data link control

In Selective Repeat ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the receive window must be _____.

• 1
• 15
• 16
• 31

In Go-Back-N ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the send window must be _____.

• 1
• 15
• 16
• 31

In Stop-and-Wait ARQ, the acknowledgment number always announces in ______ arithmetic the sequence number of the next frame expected.

• modulo-m
• modulo-2
• modulo-4
• none of the above

In Selective Repeat ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the send window must be _____.

• 1
• 15
• 16
• 31