Classful Networks

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Hi,

Not sure im having a brain dead moment here.. What happened to the 127 network? This is from the 70-270 book.

A w.0.0.0 1–126 126 16,777,214 255.0.0.0
B w.x.0.0 128–191 16,384 65,534 255.255.0.0
C w.x.y.0 192–223 2,097,152 254 255.255.255.0
D N/A 224–239 N/A N/A N/A
E N/A 240–255 N/A N/A N/A

Regards,

 

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Its not a network is it? Its just a loopback address for diagnosing network problems IIRC.

 

Cheers Raffaz, thanks for confirming im having a brain dead moment..

Now on to Chapter 14 Overview of Active Directory Service Lesson 2 Important Active Directory Concepts

 

It is a network, but it has been dedicated to the local host loopback address. try pinging 127.17.92.137 (or whatever address you like in the 127 range) and it will be the local host.
That's 16 milion addresses down the drain....

 

When IPv4 was dreamt up they thought it would be impossible to use all the addresses, they probably weren't too worried about loosing the 127 range.