ARP entry
 

Can any of the following NOT be an entry in ARP table of host 221.132.43.105?

A. 221.132.43.104 - 00:04:75:b5:20:e1
B. 221.132.129.104 - 00:04:75:b5:20:e2
C. 221.52.43.104 - 00:04:75:b5:20:e3

Explain?
 

The kernel "remembers" any ARP packages unless the noarp option is set for the interface in question. That is, I don't think any of these would be impossible. What makes you suspect, this setup is invalid?

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