1. What is IP subnetting?

IP subnetting is the process of dividing a network into smaller, more manageable sub-networks or subnets.

2. Why is subnetting important?

Subnetting improves network performance and security by segmenting traffic and controlling broadcast domains.

3. How do I calculate subnet masks?

Subnet masks can be calculated using a binary representation of the address, defining the network and host portions.

4. What tools can help with subnetting practice?

There are various online tools and applications, including the IP Subnetting Practice tool, which provides exercises and quizzes.

5. What is the difference between public and private IP addresses?

Public IP addresses are accessible over the internet, while private IP addresses are used within local networks and are not routable on the internet.

6. Can I change a subnet mask after the network is configured?

Yes, but changing a subnet mask may require reconfiguring devices and could lead to connectivity issues if not handled properly.

7. What is CIDR notation?

CIDR (Classless Inter-Domain Routing) notation is a shorthand for writing IP addresses and their associated network masks using a format like x.x.x.x/y.

8. How many subnets can I create from a class C network?

The number of subnets you can create from a class C network depends on the subnet mask used; for example, a /24 mask allows for a single subnet.

9. What is a broadcast address?

A broadcast address is a special IP address that allows information to be sent to all devices within a subnet simultaneously.

10. How does subnetting affect network security?

Subnetting enhances network security by isolating segments and reducing the potential attack surface within a network.