Consider the transportation analogy in Section 6.1.1. If the passenger is analog
ID: 3820786 • Letter: C
Question
Consider the transportation analogy in Section 6.1.1. If the passenger is analogous to a datagram, what is analogous to the link layer frame? If all the links in the Internet were to provide reliable delivery service, would the TCP reliable delivery service be redundant? Why or why not? What are some of the possible services that a link-layer protocol can offer to the network layer? Which of these link-layer services have corresponding services in IP? In TCP? Suppose two nodes start to transmit at the same time a packet of length L over a broadcast channel of rate R. Denote the propagation delay between the two nodes as d_prop. Will there be a collision if d_propExplanation / Answer
Answer) Yes, it will be redundant as all the layers of the internet have started doing the function of the reliable delivery service, than why to have another protocol to serve this purpose. There the use of the TCP reliable delievery service is reduced or becomes no more useful. Though there are some other features for which it can be used but the reliable delivery service, using an extra protocol is of no use. Better invest on something better.