IP Subnetting

[AshokJat]

Where we use 192.168.1.0/31 kind of network  ? like /31 network basically....

Can anyone explain... @network,

Regards,

Ashok 

[Georg Pauwen · Accepted solution]

Hello,

/31 subnet masks are typically used in ISP connections, for the purpose of IPv4 address conservation. On point to point links, you effectively only need two addresses anyway, so using /31 doubles the amount of subnets available.

I think there is even an RFC for /31 masks. The link below has some useful information:

https://packetlife.net/blog/2008/jun/18/using-31-bit-subnets-on-point-point-links/

[david_st]

Aren't /30 nets used at this point? I mean /30 networks contain 4 IP addresses, network address, broadcast address and two IP addresses for hosts. So to connect two devices, you can only use a /30, right?

Oh, I'm sorry, I didn't read the article you sent with your post.