Question Bank - Computer Networks

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Suppose computers A and B have IP addresses 10.105.1.113 and 10.105.1.91 respectively and they both use the same netmask N. Which of the values of N given below should not be used if A and B should belong to the same network?

A.
255.255.255.0
B.
255.255.255.128
C.
255.255.255.192
D.
255.255.255.224

Solution:

A's IP addresses = 10.105.1.113 = 10.105.1.01110001B's IP addresses = 10.105.1.91 = 10.105.1.01011011Requirement: Option 1: As Ip address 10 105 1 01110001& subnet mask 255 255 255 00000000O/P network110 105 1 00000000 Bs Ip address 10 105 101011011& subnet mask 255 255 255 00000000O/P network210 105 1 00000000O/P network1 = 10.105.1.0O/P network2 = 10.105.1.0O/P network1 and O/P network2 belongs to the same networkOption 2: As Ip address 10 105 1 01110001& subnet mask 255 255 255 10000000O/P network110 105 1 00000000 Bs Ip address 10 105 101011011& subnet mask 255 255 255 10000000O/P network110 105 1 00000000 O/P network1 = 10.105.1.0O/P network2 = 10.105.1.0O/P network1 and O/P network2 belongs to the same networkOption 3: As Ip address 10 105 1 01110001& subnet mask 255 255 255 11000000O/P network110 105 1 01000000 Bs Ip address 10 105 101011011& subnet mask 255 255 255 11000000O/P network110 105 1 01000000 O/P network1 = 10.105.1.64O/P network2 = 10.105.1.64O/P network1 and O/P network2 belongs to the same network Option 4:As Ip address 10 105 1 01110001& subnet mask 255 255 255 11100000O/P network110 105 1 01100000 Bs Ip address 10 105 101011011& subnet mask 255 255 255 11100000O/P network110 105 1 01000000 O/P network1 = 10.105.1.96O/P network2 = 10.105.1.64O/P network1 and O/P network2 belongs to the different network

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