 # Question: How Many IP Addresses Does A Class A Network Have?

## How do you know what class a network is?

The total number of networks a class address may have is calculated by subtracting the number of bits in the subnet mask from the number of bits used to determine which class of network it is.

For example, a class A network has an 8-bit subnet mask.

Only 1 bit is used to determine that it is a class A network..

## What is the 3rd number in an IP address?

Network Part This part specifies the unique number assigned to your network. It also identifies the class of network assigned. In Figure 3-1, the network part takes up two bytes of the IP address.

## How many subnets are in Class A?

The reason you would use this with a Class A mask is because it can give you up to 4,194,304 subnets with two hosts each.

## Why is 192.168 used?

Long story short, we are using 192.168. X.X IP addresses because this is best practice. The IETF has created three IP ranges for private networks, with Class C being the smallest and easiest to control and maintain. This is why most routers use exactly this IP range.

## What is the difference between Class A and Class B IP addresses?

For any given IP address, the address class is easy to determine. … If the first number is between 0 and 127 inclusive, the address is class A. If the first number is between 128 and 191 inclusive, the address is class B. If the first number is between 192 and 223 inclusive, the address is class C.

## How do you classify an IP address class?

Network Administration: Classifying IP AddressesIf the first bit is zero, the address is a Class A address.If the first bit is one and if the second bit is zero, the address is a Class B address.If the first two bits are both one and if the third bit is zero, the address is a Class C address.More items…

## Who uses Class A IP addresses?

Class A IP addresses are used for huge networks, like those deployed by Internet Service Providers (ISPs). Class A IP addresses support up to 16 million hosts (hosts are devices that connect to a network (computers, servers, switches, routers, printers…etc.)

## What is a Class A subnet?

Class A networks use a default subnet mask of 255.0. 0.0 and have 0-127 as their first octet. The address 10.52. 36.11 is a class A address. Its first octet is 10, which is between 1 and 126, inclusive.

## What does 8 mean in IP address?

The “8” denotes that there are 24 bits left over in the network to contain IPv4 host addresses: 16,777,216 addresses to be exact.

## How many IP addresses are there?

4.3 billion IPv4In fact, there are today about 4.3 billion IPv4-type IP addresses throughout the entire world.

## How many Class A networks are there?

128In a Class A network, the first eight bits, or the first dotted decimal, is the network part of the address, with the remaining part of the address being the host part of the address. There are 128 possible Class A networks.

## What is the maximum number of network IDs in Class A network?

Address Class and Network Type As a math-minded person might guess, the Class A format provides a small number of possible network IDs and a huge number of possible host IDs for each network. A Class A network can support approximately 224 hosts, which works out to 16,777,216 hosts.

## What are Class A networks?

Class A. Class A addresses are IP addresses that are assigned to network devices, such as computers, and include all addresses in which the first bit of the first octet is set to 0 (zero). … For Class A networks, the first octet represents a network ID that is defined in the address by a subnet mask.

## Are IP address classes still used?

The earlier implementation of IPv4 used address classes to divide the address space into network and node components. This arrangement was very wasteful of IP addresses and was discontinued, but the terms Class A, B and C networks are still used.

## What is a Class A network IP address?

The IP range 127. x.x.x is reserved for loopback IP addresses. The default subnet mask for Class A IP address is 255.0. 0.0 which implies that Class A addressing can have 126 networks (27-2) and 16777214 hosts (224-2). Class A IP address format is thus: 0NNNNNNN.HHHHHHHH.HHHHHHHH.HHHHHHHH.

## What are the 3 major classes of an IP network?

Currently there are three classes of TCP/IP networks. Each class uses the 32-bit IP address space differently, providing more or fewer bits for the network part of the address. These classes are class A, class B, and class C.

## What are the first 3 octets of an IP address?

The first 24 bits (the first three octets) identify the network and the remaining 8 bits indicate the host within the network. An example of a Class C IP address is 200.168. 212.226 where “200.168. 212” identifies the network and “226” identifies the host on that network.