How many usable IP addresses are available in a /28 subnet?

How many usable IP addresses are available in a /28 subnet?

Step 1: Understand what a /28 subnet means. The '/28' indicates that the first 28 bits of the IP address are used for the network part.
Step 2: Calculate the total number of addresses in a /28 subnet. Use the formula 2^(32 - 28). This means 2^4.
Step 3: Calculate 2^4, which equals 16. This means there are 16 total addresses in a /28 subnet.
Step 4: Identify that in every subnet, 2 addresses are reserved: one for the network address and one for the broadcast address.
Step 5: Subtract the 2 reserved addresses from the total addresses. So, 16 - 2 = 14.
Step 6: Conclude that there are 14 usable IP addresses in a /28 subnet.

Subnetting – Understanding how to calculate the number of usable IP addresses in a given subnet mask.
CIDR Notation – Knowledge of Classless Inter-Domain Routing (CIDR) and how it represents subnet masks.
Network and Broadcast Addresses – Recognizing that the first address in a subnet is the network address and the last address is the broadcast address, which cannot be assigned to hosts.