73: Brick Itself
I would really love to finish the first draft of the new Networking for Systems Administrators by the end of February.
On a traditional network, the first address in a subnet is the network address and the subnet’s last IP is the broadcast address. These addresses were designed to be unusable. If your office uses the network 203.0.113.0/24, the addresses 203.0.113.0 and 203.0.113.255 are unusable. There’s nothing magic about the numbers .0 and .255, they’re dictated by the subnet size.
Modern IP stacks no longer use the network and broadcast addresses for their original functions. Indeed…
The skinny
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