Chris Bennett <cpb_m...@bennettconstruction.us> writes: > So, what happens with 104.149.1.112? Does anybody get to actually use > it? Or is it just a placeholder?
Here is my understanding. View the address 104.149.1.112 in binary format: 01101000.10010101.00000001.01110000 The /28 netmask is: 11111111.11111111.11111111.11110000 So in this case the "host" part is the last four bits. That gives you 16 addresses possible. When the host bits are all zero, that is the network address. It's the "network" without any specific host. It's used in routing tables (maybe other things?). When the host bits are all ones, that's the broadast address. It refers to all hosts on the network. Hosts can use any address between these two. So the /28 network has 14 hosts. The first or last host address is typically the gateway but as far as I know that's just convention. Allan
