Today I would like to discuss a banal situation: host A is directly connected to host B, ping from host A to host B does not work. What are the possible reasons?
I was asked this question during the interview and, to be honest, did not include all possible options in my reply. Maybe because question is too basic or I was too nervous :)
So, here I am going to list all possible variants:
1. Check if host A can see Mac address of host B using command (the same for Linux and Windows):
arp -a
If there is no MAC of host B, than:
- Wire may be damaged
- IP address on host B can be not configured or configured incorrectly
- Host B can be turned off or frozen
2. If you see MAC of host B, than:
- Pings can be filtered on host B local firewall
- Subnet mask on host B can be configured incorrectly
I think, these are all possible reasonable issues.
I was asked this question during the interview and, to be honest, did not include all possible options in my reply. Maybe because question is too basic or I was too nervous :)
So, here I am going to list all possible variants:
1. Check if host A can see Mac address of host B using command (the same for Linux and Windows):
arp -a
If there is no MAC of host B, than:
- Wire may be damaged
- IP address on host B can be not configured or configured incorrectly
- Host B can be turned off or frozen
2. If you see MAC of host B, than:
- Pings can be filtered on host B local firewall
- Subnet mask on host B can be configured incorrectly
I think, these are all possible reasonable issues.
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