Question: How Many Subnets Are In Class A?

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 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.

How many IPs is a 16?

CIDR, Subnet Masks, and Usable IP Addresses Quick Reference Guide (Cheat Sheet)CIDRSubnet MaskTotal IPs/19255.255.224.08192/18255.255.192.016,384/17255.255.128.032,768/16255.255.0.065,53629 more rows•Aug 26, 2011

What is Class C in IP address?

Class C. In a Class C network, the first two bits are set to 1, and the third bit is set to 0. That makes the first 24 bits of the address the network address and the remainder as the host address. Class C network addresses range from to

What does 16 mean in IP address?

The `/16′ means that the first 16 binary digits is the network address, in other words, the `1.2. ‘ part is the the network (remember: each digit represents 8 binary digits). This means any IP address beginning with `1.2.

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 are the 3 classes of subnet mask?

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

How many networks are in a class A?

126 networksThe 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).

How do you find the subnet mask of a Class A?

Valid subnet address: To figure out the valid subnet address, simply subtract the subnet mask from 256. For example, if you had a Class A mask of 255.240. 0.0, the equation would be 256-240=16. The number 16 is the first subnet and also your block size.

How many subnets are in a class C?

10.0 is divided into eight subnets, each subnet has 32 total IPv4 addresses and 30 usable IPv4 addresses. Two IPv4 addresses are used in each subnet to represent the network address and the directed broadcast address. The subnet mask for three bit subnetting for a Class C network is 255.255. 255.224.

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.)

How many subnets are in a 24?

Converting /29 gives 255.255. 255.248. This shows that the fourth octet is the interesting octet. Deducting 248 from 256 gives us 8 so the subnets are 0, 8, 16, 24, 32, 40, 48……2-3 Subnetting.Dotted Decimal ValueCIDR notation255.255.255.0/24255.255.255.128/25255.255.255.192/26255.255.255.224/2719 more rows•Dec 12, 2013

How many 20 subnets are in a 16?

Network BitsSubnet MaskNumber of Subnets/17255.255.128.02 (0)/18255.255.192.04 (2)/19255.255.224.08 (6)/20255.255.240.016 (14)11 more rows•Aug 16, 2003

What are Class A networks?

Class A Class A comprises networks 1.0. 0.0 through 127.0. 0.0. The network number is contained in the first octet. The last three octets provide for a 24 bit (32 – 8) host part, allowing 256 x 256 x 256 – 2 = 16,777,214 hosts for each A class.

How many subnets are in a 16?

Class ANetwork BitsSubnet MaskNumber of Subnets/16255.255.0.0256 (254)/17255.255.128.0512 (510)/18255.255.192.01024 (1022)/19255.255.224.02048 (2046)19 more rows

What is 23 subnet?

Subnet Mask Cheat SheetAddressesNetmask/ 25128255.255.255.128/ 24256255.255.255.0/ 23512255.255.254.0/ 221024255.255.252.011 more rows

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.