25 how many hosts

This ensures you can identify the value of 2 n Answer: C is correct. It indicates a subnet mask of The formula to determine how many hosts can operate on a network is 2 n -2, where n is the number of 0 bits in the subnet mask. A subnet mask has 32 bits. Using the 2 n -2 formula, or 2 5 — 2, or 32 — 2, you see the answer is This is how many hosts you can have on the network. A is incorrect.

Using the 2 n -2 formula, or 2 7 — 2, or — 2, you see the answer is This is much more than the 24 needed and wastes IP addresses. B is incorrect. Using the 2 n -2 formula, or 2 6 — 2, or 64 — 2, you see the answer is D is incorrect.

Using the 2 n -2 formula, or 2 4 — 2, or 16 — 2, you see the answer is Instead, they are part of the explanation of how to determine how many hosts are supported in a subnet when given the subnet mask or CIDR notation.

You must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. This excerpt includes the introduction and Chapter 1. Can you identify how many hosts can fit on a subnet given the CIDR notation? Note that two IP addresses cannot be assigned to any host: Using the Formula to Determine How Many Hosts The formula for determining the number of hosts a network supports is 2 n -2, where n is the number of bits used for the host.

Both indicate 2 raised to the power of n. You subtract two to reserve one IP for the network ID and one for the broadcast address.

A subnet is a division of an IP network internet protocol suite , where an IP network is a set of communications protocols used on the Internet and other similar networks.

The act of dividing a network into at least two separate networks is called subnetting, and routers are devices that allow traffic exchange between subnetworks, serving as a physical boundary.

IPv4 is the most common network addressing architecture used, though the use of IPv6 has been growing since An IP address is comprised of a network number routing prefix and a rest field host identifier. A rest field is an identifier that is specific to a given host or network interface. CIDR is a method used to create unique identifiers for networks, as well as individual devices. For IPv4, networks can also be characterized using a subnet mask, which is sometimes expressed in dot-decimal notation, as shown in the "Subnet" field in the calculator.