State TRUE or FALSE, or fill in the blanks. Single-parity check can detect all s

Question

State TRUE or FALSE, or fill in the blanks. Single-parity check can detect all single- and double-bit errors. The _____ layer is responsible for the reliable delivery of frames between two nodes that are directly connected. The packet transmission speed depends on the length of the link. The number of bits needed for the sequence number field in the Stop-and-Wait protocol is _____ _____ is the main switching technology in the Internet. _____ Division Multiplexing is typically used in circuit-switched networks. Suppose a Stop-and-Wait protocol uses the following variation of the standard one: all frames (including retransmitted frames) are numbered 0 and 1 alternately. For example, if a new frame is numbered 0, the first retransmission is numbered 1, the next retransmission is numbered 0, and so on. The ACKs are numbered with the frame being acknowledged. Show by example that this protocol will not work.

Explanation / Answer

(a) (i) False. Single parity check can detect only single bit error. It cannpt drtrct double bit errors.

(a) (ii) Transport Layer. This layer have algorithms intelligence that ensures the reliable and efficient communication.

(a) (iii) False. Packet delivery time = Transmission time + Propagation delay; and Propagation delay = Distance/ Propagation speed

(a) (iv) Stop and Wait is designed for noiceless channel, so don't required any sequence number. Morever, when size of sender window is 1, which is equivallent to Stop and Wait; don't need any sequence or bit.

(a) (v) Packet Switching

(a) (vi) Time

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