Network Abode Range: Class A
Written on 03:23 by Ahmet Emir
The designers of the IP abode arrangement said that the aboriginal bit of the aboriginal byte in a Class A network
address charge consistently be off, or 0. This agency a Class A abode charge be amid 0 and
127 in the aboriginal byte, inclusive.
Consider the afterward arrangement address:
0xxxxxxx
If we about-face the added 7 $.25 all off and again about-face them all on, we’ll acquisition the Class A ambit of network
addresses:
00000000 = 0
01111111 = 127
So, a Class A arrangement is authentic in the aboriginal octet amid 0 and 127, and it can’t be less
or more. (Yes, I apperceive 0 and 127 are not accurate in a Class A network. I’ll allocution about reserved
addresses in a minute.)
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