Subnetting Concepts and Terminology

These flashcards cover key vocabulary and concepts related to subnetting, network addressing, and the structure of IP addresses that are crucial for understanding data communications and networks.

Subnetting

The practice of dividing a network into smaller, manageable sub-networks or subnets.

Subnet Mask

A 32-bit number that masks an IP address and divides it into the network and host portions.

CIDR Block

Classless Inter-Domain Routing block, specifies the IP addresses available in a certain range (e.g., 128.210.0.0/15).

Borrowed Bits

Bits taken from the host portion of a subnet mask to increase the network portion.

Network Address

The address assigned to a subnet, representing all devices in that subnet.

Usable Hosts

The total number of usable IP addresses in a subnet, calculated as 2^n - 2, where n is the number of host bits.

Binary Counting for Subnets

A method used to determine the subnet ID by incrementing binary values.

Private IP Address

IP addresses reserved for private networks, such as 10.0.0.0, 172.16.0.0, and 192.168.0.0.

Logical AND Operation

A binary operation used in subnetting to combine network addresses for routing.

Extended Network ID

The specific identifier for a subnet after subnetting has been applied.

Classful Networking

An older scheme for allocating IP addresses based on fixed classes; less flexible than classless (CIDR).

Classless Networking

A more flexible method of allocating IP addresses without being restricted to the previous classful networking schema.