Consider host M which transmits five back$-$to$-$back TCP segments to host N$.$ The first segment starts with sequence number $430,$ and each segment contains $520$ bytes of data. Suppose that the second segment is lost and assuming that the receiver is buffering segments which arrive out of order, answer the following questions:

a$.$ What is the use of timers in TCP protocol? Should timer be set to long or short periods?

b$.$ Which technique is used in TCP to overcome the problem of long timeout periods?

c$.$ Draw a timing diagram which illustrates interaction between host M and host N using TCP

reliable data transfer. The diagram should address the following requirements:

$$ Assuming that the sender is using the technique named in $($b$),$ show segments exchanged

between host M and host N such that all the five packets eventually are received by host

N$.$

$$ Show data segment, ACKs, sequence number, number of bytes, timers, and timeouts.