In CIDR notation, what does a /22 subnet mask indicate?

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Question: In CIDR notation, what does a /22 subnet mask indicate?

Options:

Correct Answer: 255.255.252.0

Solution:

A /22 subnet mask corresponds to 255.255.252.0, allowing for 1024 IP addresses in the subnet.

In CIDR notation, what does a /22 subnet mask indicate?

In CIDR notation, what does a /22 subnet mask indicate?

Step 1: Understand what CIDR notation is. CIDR stands for Classless Inter-Domain Routing, and it is a way to specify IP addresses and their associated network masks.
Step 2: Recognize that the '/22' in CIDR notation indicates the number of bits used for the network part of the address. In this case, 22 bits are used for the network.
Step 3: Calculate the subnet mask. A /22 subnet mask means that the first 22 bits are '1's and the remaining bits (10 bits) are '0's. This translates to 255.255.252.0 in decimal format.
Step 4: Determine how many IP addresses are available in a /22 subnet. The formula to calculate the number of IP addresses is 2^(32 - subnet bits). For /22, it is 2^(32 - 22) = 2^10 = 1024 IP addresses.
Step 5: Conclude that a /22 subnet mask allows for 1024 IP addresses in the subnet.

CIDR Notation – CIDR (Classless Inter-Domain Routing) notation is a method for allocating IP addresses and IP routing that uses a suffix to indicate the number of bits in the subnet mask.
Subnet Mask Calculation – Understanding how to convert CIDR notation to a traditional subnet mask and how to calculate the number of usable IP addresses based on the subnet mask.