Quick Answer: What Is Subnet Mask Example?

Why do we need subnet mask?

9 Answers.

We need a subnet mask for IPv4 addresses because the address doesn’t give any information on the network size.

Class sizes are not the network sizes.

Also to be clear the purpose of the subnet mask is to determine which hosts are on the local network and which are outside of the network..

How are subnets created?

Subnetting is a way to divide an IP address block into smaller portions, so fewer IP addresses are wasted. But we know we don’t need all 254 hosts created by this IP address block, so we can borrow some of the host “bits” to create a new “subnetwork,” or subnet. … This is where subnet masks come back in.

What exactly is a subnet?

A subnetwork or subnet is a logical subdivision of an IP network. The practice of dividing a network into two or more networks is called subnetting. … This results in the logical division of an IP address into two fields: the network number or routing prefix and the rest field or host identifier.

What is difference between subnet and VLAN?

A VLAN is an Ethernet level concept, a subnet is an IP level concept. A VLAN splits an Ethernet network into multiple logically seperate Ethernet networks. A subnet defines which hosts a host will try to communicate with directly verses which hosts will need to go via a router.

Why do we need 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.

What is custom subnet mask?

The custom subnet mask, also called a variable length subnet mask, is used to identify the bits used for a network address versus the bits used for a host address. ■ Custom subnet masks are used when subnetting or supernetting.

What are the 3 classes of subnet mask?

The three default subnet masks are 255.0. 0.0 for Class A, 255.255. 0.0 for class B, and 255.255. 255.0 for Class C.

What is subnet simple words?

A subnet, or subnetwork, is a segmented piece of a larger network. More specifically, subnets are a logical partition of an IP network into multiple, smaller network segments. … Each computer, or host, on the internet has at least one IP address as a unique identifier.

What is a 192.168 IP address?

Using 192.168. 192.168. 0.0 is the beginning of the private IP address range that includes all IP addresses through 192.168. … One common IP address assigned to home routers is 192.168. 1.1. This IP address is used because the router is on the 192.168.

What are the 4 parts of an IP address?

IPv4 addresses are usually represented in dot-decimal notation, consisting of four decimal numbers, each ranging from 0 to 255, separated by dots, e.g., 172.16. 254.1. Each part represents a group of 8 bits (an octet) of the address.

What is a subnet mask and how is it 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.

What do I put for subnet mask?

Most home networks use the default subnet mask of 255.255. 255.0. However, an office network may be configured with a different subnet mask such as 255.255. 255.192, which limits the number of IP addresses to 64.

What is subnetting explained with example?

Subnetting is the practice of dividing a network into two or more smaller networks. It increases routing efficiency, enhances the security of the network and reduces the size of the broadcast domain.

How do you explain subnet mask?

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.