Quick answer: What Is IP Valid?

What is difference between public IP and Private IP?

What is the difference between public and private IP address.

A public IP address is an IP address that can be accessed over the Internet.

Private IP address, on the other hand, is used to assign computers within your private space without letting them directly expose to the Internet..

What happens if subnet mask is wrong?

As an example, if you create four subnets (such as in the subnetting example) but use the incorrect subnet mask of 255.255. 255.0 in your TCP/IP configuration, hosts will not be able to determine that some computers are on different subnets than their own.

Why is 192.168 always 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.

Is 172 a valid IP address?

There are lots of 172. a.b.c addresses which are perfectly fine. Specifically, anything not in the range Balakrishnan mentions is valid and should be routed as normal. The addresses in RFC1918 are designed to be used inside a company’s network, never to be seen on links between networks.

What IP address Cannot be used?

Two addresses that cannot be used in your example are 192.168. 123.0 and 192.168. 123.255 because binary addresses with a host portion of all ones and all zeros are invalid. The zero address is invalid because it is used to specify a network without specifying a host.

Can I change my IP address?

The easiest way to change your IP address is to change your location. When you connect to the internet at your workplace, you’re assigned a different IP address than when you connect at home. Also, anywhere with WiFi will provide you with a different IP address.

How many IP addresses are there?

Both IPv4 and IPv6 addresses come from finite pools of numbers. For IPv4, this pool is 32-bits (232) in size and contains 4,294,967,296 IPv4 addresses. The IPv6 address space is 128-bits (2128) in size, containing 340,282,366,920,938,463,463,374,607,431,768,211,456 IPv6 addresses.

What is a 192.168 IP address?

192.168. 1.1 is a common factory IP address for a consumer-grade router. If the router is used for connecting to the Internet then all computers and devices which access the Internet through it will use this address as their default gateway.

What are the 3 major classes of an IP network?

IP Address Classes: IP addressing supports three different commercial address classes; Class A, Class B, and Class C. In a class A address, the first octet is the network portion, so the class A address of, 10.1.

What are the 2 types of IP address?

These IP addresses are further divided into two main types: Static and Dynamic IP address.

What is a 10.0 0.0 IP address?

The Internet Assigned Numbers Authority (IANA) reserves the following IP address blocks for use as private IP addresses: 10.0. 0.0 to 10.255. 255.255. 172.16.

What are valid IP addresses?

A valid IP address must be in the form of A.B.C.D, where A,B,C and D are numbers from 0-255. The numbers cannot be 0 prefixed unless they are 0. Example: Given “25525511135”, return [“”, “”]. (

How do I know if an IP address is valid?

A valid IPv4 address is made of four octets (4 divisions of 8bits) each octet can host less than 2^8 – 1 (that is 255 valid values.) Each octet must have a number between (0 – 255) to be considered as a valid IP address. However certain values are reserved for special purposes. such as 255.255.

How do I know if my IP address is public or private?

You have to check “IPv4 Address” which is your interface IP address using gateway 192.168. 70.1. with reference to the above range (range 1), if it falls under bracket then your IP is private.

Is 192.168 private or public?

192.168. Note that only a portion of the “172” and the “192” address ranges are designated for private use. The remaining addresses are considered “public,” and thus are routable on the global Internet.

Is 172.16 a public IP?

Private addresses include IP addresses from the following subnets: Range from to — a network with a or an /8 (8-bit) mask. Range from to — a network with a (or a 12-bit) mask.

What does it mean 192.168 0.0 24?

It’s called CIDR (Classless Inter-Domain Routing) notation. It’s also commonly referred to as the prefix length. The number after the slash represents the number of consecutive 1’s in the subnet mask. For example, is equal to the network with a subnet mask.

Can you run out of IP?

Cisco, a global networking giant has predicted that by 2020, 50 billion devices will be connected to the Internet. And if a device is connected to the Internet it should have a unique IP address. … We will never run out of IP addresses.