Quick Answer: What Is A Valid Subnet Mask?

What is subnet mask and why it is used?

A subnet mask is used to divide an IP address into two parts.

One part identifies the host (computer), the other part identifies the network to which it belongs.

To better understand how IP addresses and subnet masks work, look at an IP (Internet Protocol) address and see how it is organized..

How do you subnet?

255.248 or /29.STEP 1: Convert to Binary.STEP 2: Calculate the Subnet Address. To calculate the IP Address Subnet you need to perform a bit-wise AND operation (1+1=1, 1+0 or 0+1 =0, 0+0=0) on the host IP address and subnet mask. … STEP 3: Find Host Range. … STEP 4: Calculate the Total Number of Subnets and Hosts Per Subnet.

What is Subnet Mask example?

For example, 255.255. 255.0 is the subnet mask for the prefix 198.51. 100.0/24. Traffic is exchanged between subnetworks through routers when the routing prefixes of the source address and the destination address differ.

Is subnet mask always 255?

hmm Almost every small network uses a subnet mask of 255.255. 255.0 and this allows for 255 IP addresses on that network. … A subnet mask is a binary mask made up of all 1, contiguous.

Where is subnet mask on router?

In the Windows search fields, type cmd, to open command prompt.Press Enter.Type ipconfig/all press Enter.Find your network settings.Your PC’s IP address and your network Subnet Mask and Gateway will be listed.

What are the 4 parts of an IP address?

IP Address ComponentsAddress Class. Early in the development of IP, the IANA (Internet Assigned Numbers Authority) designated five classes of IP address: A, B, C, D, and E. … Default Subnet Mask. … The Network Field. … The Host Field. … Non-default Masks. … The Subnet Field.

How many subnets can I create?

With these three bits, it is possible to create eight subnets. With the remaining five host ID bits, each subnet can have up to 32 host addresses, 30 of which can actually be assigned to a device since host ids of all zeros or all ones are not allowed (it is very important to remember this).

What is a valid subnet?

The valid subnets are 64 and 128. … Answer: The valid hosts are the numbers between the subnet number and the mask. For the 64 subnet, the valid host range is 64-126. For the 128 subnet, the valid host range is 129-190.

What is an invalid subnet mask?

The purpose of a subnet mask is to demarcate the portion of the IP address that contains location information and the portion that contains identity information. The reason why the mask given is invalid is because it is not contiguous. The binary representation looks like this: 1111 1111.1111 1111.1111 1111.0100 0000.

How do you create a subnet?

In the Subnets tab, click Create. In the Create Subnet dialog box, specify subnet details, such as the name, subnet IP address or subnet mask, range of IP addresses, gateway address, and broadcast domain. You can specify the IP addresses as a range, as comma-separated multiple addresses, or as a mix of both.

What is subnet mask and gateway?

on a network. … A gateway IP refers to a device on a network which sends local network traffic to other networks. The subnet mask number helps to define the relationship between the host (computers, routers, switches, etc.) and the rest of the network.

Why do we create subnets?

The main purpose of subnetting is to help relieve network congestion. Congestion used to be a bigger problem than it is today because it was more common for networks to use hubs than switches. When nodes on a network are connected through a hub, the entire network acts as a single collision domain.