ETCS-305
Computer Networks
Assignment-I
Question 1: Write a brief note on evolution of Internet.
Question 2: What is the difference between Intranet, Internet and Extranet?
Question 3: What are the advantages and disadvantages of computer
networks?
Question 4:
a) What is the difference between ISO-OSI and TCP/IP Model?
b) Why do we use layered protocols?
Question 5: Match the following with one of the five Internet layers.
a) Communicates directly with user’s application program
b) Error correction and retransmission
c) Mechanical, electrical and functional interface
d) Responsibility of delivery between adjacent nodes
e) Reassembly of data packets
Question 6:
A) Find the class of the following IP Address.
 00000001 00001011 00001011 11101111
 11010111 10010010 10101010 11001100
B) What is netid and host id of the following IP Address?
 114.23.6.45
 208.34.54.20
C) Find the class of the following IP Addresses
 208.34.2.3
 129.45.6.90
Question 7:
A) Change the following IP Addresses into dotted decimal notation
 01111111 11110000 10101010 11001100
 10110110 11000111 10111110 00111101
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B) Change the following IP addresses to binary notation
 14.26.78.56
 245.39.211.96
C) What are the three private address ranges which can be used by any
organisation without getting them reserved?
Question 8:
A) An organisation has been granted a class C address (192.168.240.0/24)
and needs to have five subnets with the following number of hosts
60,60, 60, 30 and 30. Design a suitable subnetting scheme.
B) An organisation has been granted an IP address 150.16.0.0/16 and needs
to have 10 subnets with 100 hosts in each subnet. Design a suitable
subnetting scheme.
C) Network address of class C network is 192.168.5.0. Calculate subnet
addresses if there are five subnets and 30 hosts per subnet. Also specify
the network and broadcast address of each subnet.
Question 9:
 Summarise 172.16.29.0, 172.16.30.0. and 172.16.31.0
 Summarise 172.16.30.0, 172.16.31.0 and 172.16.32.0
 Summarise 172.16.140.0, 172.16.141.0 and 172.16.149.0
 Summarise172.16.1.10, 172.16.1.20 and 172.16.1.40
Note: Last date of submission of Assignment-I is 1st February, 2013
by 0900 hours
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