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A router uses the following routing table:DestinationMaskInterface144.16.0.0255.255.0.0eth0144.16.64.0255.255.224.0eth1144.16.68.0255.255.255.0eth2144.16.68.64255.255.255.224eth3A packet bearing an estimation address 144.16.68.117 arrives at the router. On which interface will it be forwarded?
The correct answer is "option 3".CALCULATION:To calculate the interface, perform the following steps:1.Bitwise AND between IP address 144.16.68.117 & subnet mask.2.Match the output network address with the destination address given corresponding to the subnet mask. DESTINATION ADDRESS(GIVEN)MASKBITWISE AND(ADDRESS & MASK)144.16.0.0144.16.68.117255.255.0.0144.16.0.0144.16.64.0144.16.68.117255.255.224.0144.16.64.0144.16.68.0144.16.68.117255.255.255.0144.16.68.0144.16.68.64144.16.68.117255.255.255.224144.16.68.96Option 3: 1st Octet2nd Octet3rd Octet4th Octet144.16.68.117 1001000000010000 010001001110101255.255.255.0 (&)11111111111111111111111100000000Result10010000 000100000100010000000000 14416680Hence, the packet with IP address 144.16.68.117 will be forwarded to the interface eth2.
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