Subnetting Exercise Review

These flashcards cover key vocabulary and concepts related to subnetting, essential for understanding network design and IP address management.

Address Class

Classification of IP addresses (A, B, C) to determine default subnet masks and ranges.

Default Subnet Mask

A mask that defines the network and host portions of an IP address, which for Class C is 255.255.255.0.

Prefix/Slash Notation

A shorthand for indicating the subnet mask, denoting the number of bits used for the network portion; for Class C it's /24.

Bits Borrowed

The number of host bits used to create additional subnets; calculated to meet subnet requirements.

Usable Addresses

The total number of IP addresses available for devices minus addresses reserved for the network and broadcast.

Custom Subnet Mask

The modified subnet mask that is created by borrowing host bits to increase the number of subnets; example: 255.255.255.192.

Total Possible Addresses per Subnet

Calculated using 2^H, where H is the number of host bits remaining after borrowing bits for subnets.

Usable Host IP Addresses Calculation

The formula 2^H - 2 is used to calculate usable addresses after accounting for network and broadcast addresses.

Subnetting Formula

2^N = total number of networks created, where N is the number of bits borrowed.

Broadcast Address

The last address in a subnet used to communicate to all devices in the network.