Not handwriting answer please

Computer Network

Q1:The network layer is doing the service of a carrier such as the postal office, justify this statement by your answer.

Q2:

a)What is transparent switch? b) Do you have a loop problem if there are redundant transparent switches to connect LANs with broadcast domains? c) If your answer is yes explain loop problem with solution.

* Do not provide any drawings in your answers. Otherwise your work is awarded a zero mark.

Q3:What is the basic difference between IPv4 and ICMPv4?

Q4:

Below are the details of an IPv4 packet:

1. 1st row = 1st 8 bits as (01000110) 2

2. 2nd row = M bit value of 0 and Offset value of 175

3. 3rd row = 1st 16 bits as (0000011100010001)2

Based on the above information and knowledge of IP Datagram Header Format, answer the following questions:

1. What is the Version Number? Give reason for your answer.

2. What is the header length and how is it calculated? Is there any option Bytes? If yes, how many?

3. Which fragment is this: 1st or Last and why? What is the starting position of this fragment and why?

4. How many hops will the received packet travel? Give reason for your answer.

5. Which upper layer protocol is used? Give reason for your answer.