Question: What is the primary function of the subnet mask in IP addressing?

Options:

1. To identify the network and host portions of an IP address
2. To encrypt data packets
3. To assign IP addresses dynamically
4. To route packets between networks

Correct Answer: To identify the network and host portions of an IP address

Solution:

The subnet mask is used to identify which part of an IP address refers to the network and which part refers to the host.