On Wed December 15 2004 10:40 am, Will wrote:
> When you are assigned a 16-block (/28) IP address block by an
> ISP, why are only 13 IPs usable? I was told that the first and
> last addresses in the block are not usable, and the 14th address
> is the gateway. What are the first and last address used for?


First adddress is the network ID, last address is the broadcast address.

--
Stephen Carville
Unix and Network Adminstrator
DPSI
6033 W.Century Blvd.
Los Angeles, CA 90045
310-342-3602