[GLLUG] IP Address Issue

[Patrick Collora]

Not Linux-specific, but maybe someone here knows the answer.  I was 
having some trouble connecting to the Internet through my router, and I 
suspect it might be due to the IP address I was assigned.  When I 
bypassed the router, AT&T assigned the following to my PC.

    IPv4 Address. . . . . . . . . . . : 108.68.143.0
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . : 108.68.143.1

Is the IP ending in zero valid, or is it the network identifier?

Thanks.
-Patrick