What is the tern HOSTID mean, and is it the same as a MAC address
when I go to Run and type cmd then IP config I get this:

IP address #= 9 number string

Subnet Mask #= 10 number string

Default Gateway #= 10 number string

Which one of these is the HOSTID or MAC number,
and are string of numbers for the subnet mask or Default Gateway the same in quantity? what I mean is my DSL SBC Yahoo (2Wire modern) have 10 numbers
but some other DSL modem and providers may have more numbers? Like 12 or more yes!
Thx