IP and port numbers

[Chuck Bearden]

On Thu, 28 May 1998, Wen, Shixing wrote:

> Could someone explain how a machine can have more than one ip address? 
> 
> Shixing Wen

A machine could have two or more network cards, each one with its 
own address.  I think that such a host is said to be "multi-homed".  
Both cards could be connected to the same network, or they each be 
connected to different networks.

Some (maybe most?) network operating systems will also let you
instruct a single network card to respond to two or more IP addresses.
Under Linux, for example, this is called IP aliasing.  

Chuck Bearden
Network Services Librarian
Houston Public Library
Houston, TX  77002
713/247-2264 (voice)
713/247-1182 (fax)
cbearden at hpl.lib.tx.us