Network/Subnetting

[rvidaman]

Is 255.255.255.255 a valid subnet mask issued by an ISP? /the also say that if they issue this subnet mask no gateway is required!

 

[strongm]

It isn't that a gateway isn't required. It's that a /32 mask can't have a gateway. Traffic has to be routed.

 

[rvidaman]

What about the fact that the IP number is a class c and the subnet is a class d.
IP no: 209.181..
S/N: 2550.255.255.255
No Gateway-
The router is a Cisco Linksys E2500 Class C router...

 

[ChrisHirst]

IP 'classing' hasn't really existed for the Internet routing since 1993 when CIDR (Classless Inter-Domain Routing) was introduced by the IETF (Internet Engineering Task Force) for IP (Internet Protocol) routing.

A netmask of 255.255.255.255 (a 32 bit map) can connect every possible IPv4 address so is technically NOT a 'subnet mask' more on subnet masks.

You also might want to have a look at the Data Transmission Forums for more info as well.



Chris.

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