The concept of subnetting in computer/communication networks refers to the process of dividing a network into two or more smaller networks, known as subnets. This is done by altering the subnet mask of the network. The subnet mask is a 32-bit number that masks an IP address and divides the IP address into network address and host address.

Subnetting is necessary for several reasons:

1. It improves network performance and speed: By dividing a large network into smaller subnets, local traffic is limited to the subnet. This reduces traffic on the network and improves performance.

2. It reduces network congestion: Subnetting can help reduce network congestion by isolating traffic within subnets.

3. It enhances network security: Subnetting can help improve network security by isolating sensitive or critical systems on separate subnets.

4. It simplifies management: Subnetting makes it easier to manage and troubleshoot the network.

Now, let's design a network without and with subnetting using a Class C Public IP address, as your roll number is 61.

Without Subnetting:
Let's assume the IP address of the network is 192.168.1.0 with a default subnet mask of 255.255.255.0. This network can have 254 hosts (from 192.168.1.1 to 192.168.1.254). All devices in this network would be in the same broadcast domain, which could lead to a lot of unnecessary traffic.

With Subnetting:
Let's divide the above network into four subnets. To do this, we change the subnet mask to 255.255.255.192. This gives us four networks: 192.168.1.0, 192.168.1.64, 192.168.1.128, and 192.168.1.192. Each of these networks can have 62 hosts. This reduces the size of each broadcast domain and thus reduces unnecessary traffic.

In conclusion, subnetting is a crucial concept in computer/communication networks that can greatly improve network performance, reduce congestion, enhance security, and simplify management.

Question

The concept of subnetting in computer/communication networks refers to the process of dividing a network into two or more smaller networks, known as subnets. This is done by altering the subnet mask of the network. The subnet mask is a 32-bit number that masks an IP address and divides the IP address into network address and host address.

Subnetting is necessary for several reasons:

1. It improves network performance and speed: By dividing a large network into smaller subnets, local traffic is limited to the subnet. This reduces traffic on the network and improves performance.

2. It reduces network congestion: Subnetting can help reduce network congestion by isolating traffic within subnets.

3. It enhances network security: Subnetting can help improve network security by isolating sensitive or critical systems on separate subnets.

4. It simplifies management: Subnetting makes it easier to manage and troubleshoot the network.

Now, let's design a network without and with subnetting using a Class C Public IP address, as your roll number is 61.

Without Subnetting:
Let's assume the IP address of the network is 192.168.1.0 with a default subnet mask of 255.255.255.0. This network can have 254 hosts (from 192.168.1.1 to 192.168.1.254). All devices in this network would be in the same broadcast domain, which could lead to a lot of unnecessary traffic.

With Subnetting:
Let's divide the above network into four subnets. To do this, we change the subnet mask to 255.255.255.192. This gives us four networks: 192.168.1.0, 192.168.1.64, 192.168.1.128, and 192.168.1.192. Each of these networks can have 62 hosts. This reduces the size of each broadcast domain and thus reduces unnecessary traffic.

In conclusion, subnetting is a crucial concept in computer/communication networks that can greatly improve network performance, reduce congestion, enhance security, and simplify management.

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