On  3 Dec 98 at 17:48, James Edwards wrote:

> At 18:50 -0500  on 12/3/98,  in the message "[PCSOFT] Static IP" you wrote:
> > {SNIP}
> > Can someone explain to me the difference between an IP and a Static IP.
> {SNIP}
> A static IP Address is one assigned to a computer eg. 123.456.789.21,and is
> always the same. Whereas most ISPs use DHCP (Dynamic Host Control Protocol)
> to assign IP Address upon connection from a pool of addresses eg.
> 123.456.789.1 to 123.456.789.254; the IP address assigned will change each
> time you connect, and therefore is not static.

  DHCP is actually a third option.  Static and dynamic IP addresses
are used by computers on dial-up connections; DHCP is primarily used
to automate assignment of available IP addresses to Machines on a LAN
identified by name.

  Recap:

Static:  IP refers to computer; network routing is updated when
computer is connected.

Dynamic:  IP refers to connection; computer is told what IP it's on
when it connects.

DHCP: Computer obtains exclusive but time-limited use of an IP
address issued by a server.[*]  Server may issue this address to some
other computer if the lease is not "renewed" before it expires --
original machine would then have to request a new address from
server.

[*] The server itself must have a static IP address -- this is
generally a good idea for servers of any sort, and DHCP is a
convenient way to handle workstations which may be added to and
removed from the network somewhat more often than servers are.

David G

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