I confused with IP addressing... Some books said that class A.....
Class A Network -- binary address start with 0, therefore the decimal number can be anywhere from 1 to 126. Because 127 is reserved for loopback.
How come some book said class A is 1 to 127?
Which is really correct? Why other book said 1 to 127.... must be a reason..... please explain.
2006-09-10 18:03:31 · 5 answers · asked by HelloWorld 1 in Computers & Internet ➔ Computer Networking
Because the entire class A sized address space was reserved, I would say both are right. Its still class A address space, it is just not usable.
2006-09-10 18:12:51 · answer #1 · answered by Interested Dude 7 · 0⤊ 0⤋
Look at the entire forest, don't dwell on one tree, this book obviously is dwelling on one tree with IP technology.
1 - 127.x.x.x if u translate that to binary u got 00000001 - 01111111.x.x.x so the thing holds true, and 127 is a loopback being categorized as a special class that could also be class A.
However the whole deal of IP classes are clear only by seeing what the subnet mask being applied. So 127 gone into a special case.
2006-09-10 19:10:49 · answer #2 · answered by Andy T 7 · 0⤊ 0⤋
From what i recall from my cisco class 4 years ago. 1-126 is the correct number, unless they changed it. 127 has always been a loopback.
2006-09-10 18:07:00 · answer #3 · answered by noel_gallagher_86 3 · 0⤊ 0⤋
Class A first octet range:::: 1 to 126
Class A IP range ::::: 1.0.0.0 to 126.0.0.0
Number of Networks ::::: 126
Number of hosts/network::: {256*256*256}-2=16777214
2006-09-10 21:53:56 · answer #4 · answered by Marcos 4 · 0⤊ 0⤋
http://www.learntosubnet.com/
2006-09-10 18:43:54 · answer #5 · answered by jazzman 1 · 0⤊ 0⤋