mAC ADDRESS its actually network addresses.
An address that can only be used on the internal network
In computer networking, a node refers to a connection point. It has two types of addresses, a network address and a physical address.
Network layer
No. If you have one IP per customer, you don't need to create smaller subnets. (You won't have enough addresses though - the first and last addresses of the block will be the network and broadcast addresses and won't be useable. You'll only have 1022 usable addresses)
Layer 3 network addresses are logical addresses and can be easily changed by software.
A class C address.
The IP address 169.255.255.0 is part of the larger address block designated for link-local addresses in the Internet Protocol version 4 (IPv4). This specific address is technically reserved and is not typically assigned to hosts on a network. Instead, link-local addresses are used for communication within a local network segment. In practice, addresses in the 169.254.0.0/16 range are automatically assigned to devices when they cannot obtain an IP address from a DHCP server.
When you set up a sub network you decide upon the subnet mask and this determines the network address (all zeros in the subnet portion of the address) and the broadcast address (all ones in the subnet portion of the address). When you assign the host addresses in your subnet, then you use the addresses between the network address and the broadcast address.
Supernetting
The administrator can set up a Local Area Network (LAN) behind a firewall in which he can assign whatever IP address block he wishes. The firewall and router will then need to be configured to Network Address Translate (NAT) the 'hidden' internal IP addresses used on the LAN to the one assigned by the ISP when network traffic needs to leave the LAN.
•If the hosts on a network using private IP addresses need to access the Internet, a problem arises because the private IP addresses are not allowed on the Internet. •The solution is to use NAT (Network Address Translation), which uses a single public IP address to access the Internet on behalf of all hosts on the network using other IP addresses.