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What is an IP address?
When we want to communicate with another machine on the internet we need to have a way of contacting them. It is much like a persons phone number for example to call your mum you have a unique phone number for her house. IP addresses are similar as such, as they provide a unique address to contact a device or machine that is connected to a network. IP addresses are stored as binary but they are often displayed in more readable ways, such as (for IPv4), and 2001:db8:0:1234:0:567:1:1 (for IPv6).

Recent Changes to IP address.
"Originally, an IP address was defined as a 32-bit number and this system, now named Internet Protocol Version 4 (IPv4), is still in use today. However, due to the enormous growth of the Internet and the resulting depletion of the address space, a new addressing system (IPv6), using 128 bits for the address, had to be developed. IPv6 is now being deployed across the world; in many places it coexists with the old standard and is transmitted over the same hardware and network links." (1)

How information is sent using IP addresses on a network.
To send information across a network, we first need to identify there IP address for example "" (Private).
Once we have the IP address we can then send the information to that specific person using the unique IP address in the form of data packets. Data packets are then sent across the network from the sender to the receiver using the Internet Protocol.

What is data packets?
A typical data packet has a header and a footer. The header stores information for configuration and sending the information and the footer to actually store the information. The header typically has information such as source, destination, flag, port number and some other configuration settings.

A good way to think about a data packet is similar to a letter. You first of have the envelope (HEADER) then you have the inside where you put all the information. (FOOTER) this then makes every thing contained into as such a data packet that is then able to be sent to another device on the network using the Internet Protocol.

What is the Internet Protocol?
"The Internet Protocol is responsible for routing data packets between devices on networks, and IP addresses are used to specify the locations of the source and destination devices in the topology of the routing system. For this purpose, some of the bits in an IP address are used to designate a subnetwork. An IP address can be private, for use on a LAN, or public, for use on the Internet or other WAN." (2)

You can check your own LAN IP address out by going to:
Start Menu \ run
Type "cmd" press enter
Type "ipconfig" press enter

NOTE: Don't type the quotation marks.

To find out your public IP address for WAN communication go to:
Show My IP

1/2. Packet (Information Technology)

Posted by Cyber Trunks


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