Networking Concepts Questions
I am trying to understand networking and have a few questions. Please feel free to correct me If I am wrong.
A Class B network has a netmask of 255.255.0.0, therefore there are 2 octets reserved for the host part. Question: If two hosts, with xxx.xxx.5.2 and xxx.xxx.4.6 IP address belong to the same class B network xxx.xxx.0.0, then can they see each other without a router in between them? (Or must all the first three octets match before a host can see another host?).
I can use subnetting to divide a network into smaller segments by using the letfmost bits of the host for subnetting. Subnets cannot see other subnets without a router. Therefore, when configuring subnets, I will have 3 less addresses that I can use for hosts : one address is used for the subnet address (the lowest host number), one address is used for the router (typically the host next higher to the lowest host number), and one for the broadcast address (the highest host number in the subnet).
Is this correct? Thanks