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Figure 14. Example of a Fully Qualified Host Table Entry
Additional host names are useful as alternative nicknames. See the examples in
Figure 15.
Host names need not be unique. When searching the host table with a duplicate
host name, the result is random. However, IP addresses have to be unique. The
uniqueness of the IP address is enforced at the time you try to add a new entry to
the host table.
Note: An IP address cannot be used as a host name.
Figure 15. Multiple Host Names
To remove one of the additional host names, select option 2 to change the selected
host table entry. Type
over the host name to remove it.
Note: The fully qualified host name is used when sending mail between two
TCP/IP hosts.
Notice in the example that the name of server SYSNAM890 is in the host table too.
There are several reasons to put your host name in the host table:
v You may want to use your host name when using FTP, TELNET, or PING to test
your own system's configuration.
21
Chapter 1. Configuring TCP/IP
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