Two names for the windows 2008 r2 server on the network how did it happen?

Question

Windows Server

There is a router behind it server 2008r2 its name on the network is "terminal301" there is a dns windows server, for some unknown reason, you can connect to the server with the name on the network "terminal301" by the name of both "terminal301" and by the name "terminal302", there are suspicions that because of some rule in the router, but there is no access to it yet, are there any other options?

Answer 1

Delete in DNS terminal302.domainname.