What is subnet mask in Linux?

How do I find my subnet mask Linux?

Ubuntu Linux

  1. Launch the Terminal application.
  2. Type “ifconfig” at the terminal prompt, then press the “Enter” key. The IP address is labeled as “inet addr.” The subnet is labeled as “Mask.”
  3. Type “netstat -r” at the command prompt, then press the “Enter” key to view the gateway address.

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.

What is a 255.255 255.0 subnet?

A subnet mask of 255.255. 255.0 allows for close to 256 unique hosts within the network (since not all 256 IP addresses can be used). … This is the default subnet mask used by Class B networks and provides up to 65,536 IP addresses (256 x 256). The largest Class A networks use a subnet mask of 255.0.

Is netmask and subnet mask the same?

Netmask and subnet mask are often used as if they’re the same thing, but subnet masks are mostly used in network configurations, while netmasks often refer to classes of IP addresses. They’re used to define a range of IP addresses that an ISP or other organization can use.

Why is subnet mask important?

The purpose of the subnet mask is to split the IP address into the two components. When you combine, using a logical AND, the IP address and the mask you reveal the network address.

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What is subnet number?

A subnet number is a specific part of a subnet address in an IP address that identifies one among several subnets as the recipient or originator of a data packet. The subnet number helps browsers to accurately use the Internet to deliver messages to specific parts of a party’s full network.

What is IPv4 and IPv6?

IPv4 uses a 32-bit address for its Internet addresses. … IPv6 utilizes 128-bit Internet addresses. Therefore, it can support 2^128 Internet addresses—340,282,366,920,938,463,463,374,607,431,768,211,456 of them to be exact. The number of IPv6 addresses is 1028 times larger than the number of IPv4 addresses.