Computer-Networks

Question 49

Consider the following routing table at an IP router:

For each IP address in Group I identify the correct choice of the next hop from Group II using the entries from the routing table above.

     Group I                 Group II
(i) 128.96.171.92        (a) Interface 0 
(ii) 128.96.167.151      (b) Interface 1
(iii) 128.96.163.121     (c) R2
(iv) 128.96.165.121      (d) R3
                         (e) R4

A	i-a, ii-c, iii-e, iv-d
B	i-a, ii-d, iii-b, iv-e
C	i-b, ii-c, iii-d, iv-e
D	i-b, ii-c, iii-e, iv-d

Computer-NetworksSubnettingGATE 2015 [Set-2]Video-Explanation

Question 49 Explanation:

Do the AND operation of group I IP address with Netmask and compare the result with network number. if it match with network number, forward packet through that interface.
Ex: 128.96.167.151 AND 255.255.254.0 = 128.96.166.0
Therefore packet will forward through R2.

Correct Answer: A

Question 49 Explanation:

Gaurav Sharma

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