Check Network Settings
Question
A server administrator is bringing a new host online.
After the initial OS installation and configuration, the administrator is unable to reach hosts on another subnet.
The administrator is able to ping and access other hosts on the same subnet.
Which of the following should the administrator check FIRST?
Answers
Explanations
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A. B. C. D.A.
The first thing the server administrator should check when unable to reach hosts on another subnet after the initial OS installation and configuration is the default gateway.
A default gateway is the router that connects a network to other networks and is responsible for forwarding packets between networks. If the default gateway is misconfigured or not configured at all, the server will not be able to communicate with hosts on other subnets.
The netmask determines the size of the network and helps to identify the network and the hosts within it. If the netmask is misconfigured, it may result in communication issues within the same subnet, but it won't affect the communication between subnets.
DNS A (AAAA) record maps a domain name to an IP address, which is important for name resolution, but it is not related to the server's ability to communicate with hosts on other subnets.
DNS reverse lookup entry maps an IP address to a domain name and also is not related to the server's ability to communicate with hosts on other subnets.
Therefore, the first thing the administrator should check in this situation is the default gateway.
