How many total IP addresses are available in a subnet with a /22 CIDR notation?

Practice Questions

Q1
How many total IP addresses are available in a subnet with a /22 CIDR notation?
  1. 1024
  2. 512
  3. 256
  4. 64

Questions & Step-by-Step Solutions

How many total IP addresses are available in a subnet with a /22 CIDR notation?
  • Step 1: Understand what /22 means. The '/22' is a way to describe the subnet mask in CIDR notation. It means that the first 22 bits of the IP address are used for the network part.
  • Step 2: Know that an IP address is 32 bits long. This means there are a total of 32 bits in an IPv4 address.
  • Step 3: Calculate the number of bits available for hosts. Subtract the number of network bits (22) from the total bits (32). So, 32 - 22 = 10 bits.
  • Step 4: Calculate the total number of IP addresses. Use the formula 2 raised to the power of the number of host bits. This is 2^10.
  • Step 5: Calculate 2^10. This equals 1024. Therefore, there are 1024 total IP addresses available in a /22 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 used for the network portion of the address.
  • Subnetting – Subnetting is the practice of dividing a network into smaller, manageable sub-networks (subnets) to improve performance and security.
  • IP Address Calculation – Understanding how to calculate the total number of IP addresses available in a subnet based on the CIDR notation.
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