Why are IP Addresses needed? How IP Addresses Work, and Why You Must have Them

Last Updated on January 19, 2024 by theadmin

Why Do you Need IP Addresses? What are IP Addresses and how do they work

Everything you need to know about IP addresses and why they’re so important in our digital world.  If you want to hide or change  yours be sure to check out this great deal from NordVPN.

What is an IP address?

An IP (Internet Protocol) address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. It serves two main functions: identifying the host or network interface, and providing the location of the host in the network. IP addresses are usually written and displayed in human-readable notation, such as There are two main versions of IP addresses in use today: IPv4 and IPv6.

Why are IP Addresses neededIP addresses identify and differentiate the billions of online devices, including computers, routers, servers, websites, and mobile phones, and help those devices communicate with one another by providing location information.

These addresses are essential for the internet to work as they are used in the TCP/IP Protocol to help devices, routers, and servers communicate with each other.

How do IP addresses work?

The way Internet Protocol works is that information is transmitted over the network in discrete chunks called packets; each packet is mostly made up of whatever data the sender is trying to communicate, but also includes a header, consisting of metadata about that packet. Among other pieces of data stored in the packet header are the IP address of the device that sent the packet and the IP address of device where the packet is heading. Routers and other network infrastructure use this information to make sure the packets get to where they’re supposed to go.

To understand how IP addresses work, it is important to understand the basics of the internet. The internet is a global network of computers that communicate by following protocols, which are rules that define how data is transmitted between electronic devices.

When a device, such as a computer or smartphone, connects to a network, it is assigned an IP address. This IP address is used to identify the device and its location on the network. Data is then sent to and from the device by addressing it using its IP address.

How do We Get an IP address?

The IP address is assigned to our device by our Internet Service Provider (ISP). All of our internet activity is routed through the ISP and back to our device using our IP address. If we are in a different location, then our IP address will change and be assigned to us by the ISP of that particular location.

In conclusion, IP addresses are essential for our online activities as they allow our devices to connect to the internet and identify our location. It also helps the internet determine where to send our requests and how to retrieve responses so that we get the data we need.

What are the different types of IP addresses

Public IP Address

A public IP address is a unique numerical label assigned to a device connected to the internet usually by an Internet Service Provider (ISP). These IP addresses are used to identify devices connected to the internet and can be used to locate and communicate with these devices.

A public IP address is globally unique, meaning that no two devices on the internet will have the same public IP address. Public IP addresses are used for devices that need to be accessible from the internet, such as servers or websites.

A public IP address can be either static or dynamic. A static public IP address is one that does not change and is assigned to a device permanently, whereas a dynamic public IP address is one that can change periodically, often assigned by DHCP.

It’s worth noting that most home networks, use a technique called Network Address Translation (NAT) to share a single public IP address among multiple devices. In this case, the router on the network is assigned a public IP address and acts as a gateway to the internet, while devices on the internal network are assigned private IP addresses and communicate with the internet through the router’s public IP address.internet protocol requirements

Private IP Address

A private IP address, often called a local or internal IP address, is an identifier assigned to a device from within a private network. These addresses are not routed on the internet and are intended mainly to work within the local network. Private IP addresses are part of a reusable pool set aside by the Internet Engineering Task Force for individual networks.

There are several ranges of IP addresses that are reserved for private use, known as the private IP address ranges.

The most common ranges are:

  1. – (
  2. – (
  3. – (

These addresses are considered private because they are only used for directing packets within the local, private network and cannot be seen by anyone outside the network.

The job of the router is to alter the origin and destination IP addresses in each packet’s headers as needed as it passes between the private network and the public internet, a process known as network address translation (NAT).

Using private IP addresses within a network, combined with Network Address Translation (NAT) allows for the efficient use of limited public IP addresses, as multiple devices can share a single public IP address to access the Internet.

Loopback Address

A loopback address is a special IP address, usually assigned the value of or ::1 in IPv4 and IPv6 respectively, that is used to establish network connections to the same device or host. This address is used for testing network interfaces and is also known as the “localhost” address.

When a process on a device sends a packet to the loopback address, the network stack on the device receives the packet as if it had been sent from another device on the network. This allows for testing of the network stack and other network-related functionality, without the need for a separate device or network connection.

Many software applications, such as web servers, databases, and development environments, use the loopback address to establish connections to the local device for testing and development purposes. It is useful for the developer to test the software without the need to connect to an external network.

So to summarise, a loopback address is a special IP address that was created to enable a computer to communicate with itself. It is typically used for testing network configurations and is an essential tool for network administrators. It is essential because it enables the device to communicate with itself without having to expose itself to the internet.

photo of public IP address image

Broadcast Address

A broadcast address is a special type of IP address that is used to send a packet to all devices on a network or subnet. In IPv4, a broadcast address is typically the highest address in a subnet’s range, and it is identified by having all host bits set to 1 in the IP address. For example, in the subnet, the broadcast address would be

In IPv6, there’s no such thing as a broadcast address, instead, there are multicast addresses. A multicast address is used to send a packet to a group of devices, rather than all devices on a network or subnet.

Broadcast addresses are used for various purposes, including:

  1. DHCP (Dynamic Host Configuration Protocol) requests and responses.
  2. ARP (Address Resolution Protocol) requests and responses.
  3. Routing updates.
  4. Network management and monitoring.

Broadcast addresses are useful for communication between devices on a network, but they can also cause network congestion and security issues. Therefore, it’s important to use broadcast addresses sparingly and to use multicast addresses instead when possible.

In summary, A broadcast address is a special type of IP address that is used to send a packet to all devices on a network or subnet. In IPv4, it’s typically the highest address in a subnet’s range and it’s identified by having all host bits set to 1 in the IP address. in IPv6 there’s no broadcast addresses, instead, there are multicast addresses. It’s used for various purposes, but it should be used sparingly to avoid network congestion and security issues.

IPv4 Address Range

The IPv4 address range is a set of 4 numbers in decimal format between 0 and 255, separated by dots, known as “dotted decimal notation,” that makes up a 32-bit address space consisting of 4,294,967,296 possible combinations.

The valid range for each octet of an IPv4 address is 0 to 255, and the total range of valid IPv4 addresses is to However, some of these addresses are reserved for specific purposes and cannot be assigned to devices.

The IPv4 address range can be further divided into several classes, each with a specific range of addresses and a default subnet mask. The five classes are:

  1. Class A: to
  2. Class B: to
  3. Class C: to
  4. Class D: to (reserved for multicast)
  5. Class E: to (reserved for future use or research)

It’s worth noting that the number of available IPv4 addresses is limited, and some addresses are reserved for special purposes such as private networks, loopback addresses, and multicast addresses.

IPv6 Address

An IPv6 address is a unique numerical label assigned to a device connected to a network using the Internet Protocol version 6 (IPv6). IPv6 addresses are 128 bits in length, represented in hexadecimal notation, and are typically written as eight groups of four hexadecimal digits separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).

IPv6 addresses are intended to replace IPv4 addresses, which are becoming increasingly scarce. The main advantage of IPv6 is that it provides a much larger address space, with 2^128 or approximately 3.4×10^38 possible addresses, which is more than enough to accommodate the growing number of devices connected to the internet.

IPv6 addresses are divided into two types: unicast and multicast. Unicast addresses identify a single interface, while multicast addresses identify a group of interfaces. Each IPv6 address also has a subnet prefix, which is used to identify the network to which the address belongs.

IPv6 also include a feature called “IPv6 address autoconfiguration” this feature allows devices to self-configure their IP addresses, without the need for manual configuration or DHCP. This simplifies the process of connecting devices to networks and reduces the need for DHCP servers. IPv6 also has built-in quality of service (QoS) and security layer (IPsec) features which make it more secure and efficient than IPv4.

In summary, IPv6 addresses are longer, unique numerical labels assigned to devices connected to a network using the Internet Protocol version 6. They provide a much larger address space than IPv4 addresses and include features such as automatic configuration and support for multicast addresses.

Subnet Address

A subnet, short for “subnetwork,” is a logical division of an IP network into smaller network segments. It is used to partition a large network into smaller, more manageable groups of devices. Subnetting allows for the creation of multiple, distinct networks within a single IP address space.

Subnetting is typically performed by borrowing some of the bits from the host portion of an IP address to create a subnet mask. The subnet mask is a bitmask that is used to divide the IP address into two parts: the network address and the host address. By applying a subnet mask to an IP address, the network administrator can identify which part of the address refers to the network and which part refers to the host.

For example, in a typical IPv4 address, the first three octets (e.g., 192.168.1.) represent the network address, and the last octet (e.g., .1) represents the host address. By applying a subnet mask of, the administrator can divide the network into 256 subnets, each containing up to 254 host addresses.

Subnetting is an important tool for network administrators, as it allows them to segment a single IP network into multiple networks, resulting in improved network performance, scalability, and security. By creating multiple subnets, network administrators are able to limit traffic and reduce the possibility of IP conflicts.

In IPv6, the subnetting is performed differently, but with the same goal, to divide an IP network into smaller segments.

Subnetting is useful for several reasons:

  1. It helps to improve network security by isolating different segments of the network from each other.
  2. It allows for more efficient use of IP addresses.
  3. It allows for the creation of smaller, more manageable networks.
  4. It facilitates the creation of virtual LANs (VLANs) which are used to segment a physical network into multiple logical networks.

How do you find your IP address?

If you’re wondering how to find your IP address, it’s actually quite simple. To locate your public IP address, simply type “What’s my IP address?” in Google Search and the address will be displayed in the search results. Alternatively, you can use websites such as whatismyipaddress.com or IP Location to get the same information.

To find your private IP address on your local network, you’ll need to dig into your device’s network settings. For Windows users, open Windows Search and type in “CMD” (without the double quotes) to access the command prompt. When the command prompt appears, type “ipconfig” to find the private IP address. For Mac users, navigate to the Network section of your System Preferences. For an iPhone, go to Settings and select Wi-Fi. Tap the letter “i” in a circle adjacent to the active network and you can locate the IP address below the DHCP tab.

You can also find the IP addresses associated with other devices in your network by accessing the router’s gateway IP address from your web browser. How you do that will depend on the brand and model of the router.

Having basic knowledge of principles related to an IP address is not mandatory, but it’s a good idea in case you run into any network-related issues. It’s amazing how knowing a little bit of networking can help troubleshooting or setting up computers and other devices. Keep this article bookmarked for easy reference in the future.

How is Geolocation data used with IP addresses?

Geolocation data is often used to determine the physical location of a device based on its IP address. This can be done by using a database that maps IP addresses to geographic locations, such as the city, state, or country where the device is located.

There are several ways that geolocation data can be used in conjunction with IP addresses:

  1. Location-based advertising: Geolocation data can be used to deliver targeted advertising to users based on their location. This can be used to display ads for local businesses or services that are relevant to the user.
  2. Fraud detection: Geolocation data can be used to detect fraudulent activity by comparing the location of a device to the location of a user’s billing or shipping address.
  3. Content delivery: Geolocation data can be used to deliver content that is tailored to the user’s location. This can include language, currency, and weather information.
  4. Network security: Geolocation data can be used to detect and block malicious traffic from specific geographic regions.
  5. Law enforcement: Geolocation data can be used by law enforcement to track down criminals or suspects using their IP address.

Geolocation data is often gathered by using a combination of different methods such as the IP address, GPS, and Wi-Fi triangulation. It’s important to note that the accuracy of geolocation data can vary depending on the method used and the database used to map IP addresses to locations. These are not always 100% accurate and it’s fairly common for people to get geolocated to the wrong country..

How Can I Spoof my IP Address?

There are a few ways to spoof your IP address, including using a virtual private network (VPN), using a proxy server, or using a peer-to-peer network like Tor. Each method has its own set of benefits and drawbacks, and the best option for you will depend on your specific needs.

For example, a VPN will encrypt your internet connection and hide your IP address, making it more secure and private. A proxy server, on the other hand, will only hide your IP address, but will not encrypt your connection. Tor is a more advanced option and can be used to access the dark web, but it can be slow and may not be suitable for all types of online activity.

Summary – Why do you need IP addresses?

1. To identify and locate computers and devices on a network

The purpose of identifying and locating computers and devices on a network with IP addresses is to establish the connection between the devices and the destination site. An IP address uniquely identifies every device on the internet, and is necessary for communication purposes. By looking at the IP number, it is possible to determine the countries, cities, longitude and latitude, and ISP (Internet Service Provider) of the people using the devices. IP address management is used to track the status and availability of every device in an organization’s infrastructure, and can be used to prevent cyber threats and assaults.

2. To route data between computers

Data routing is a process that allows data to be sent from one computer to another, regardless of the physical location of those computers. It works by assigning each computer an IP address, which is used to locate and route the data between computers. Each IP address is a unique identifier which allows data to be directed to the correct destination. Data is split up into small packets, and then sent to the destination computer, where the packets are reassembled to create the complete data. This process helps to ensure that data is delivered to the intended recipient, and is not lost or corrupted in transit.

3. To allow different networks to communicate with each other

The purpose of assigning IP addresses is to uniquely identify a device or interface on a network. IP addresses are used to route traffic between devices on the same network and to direct data from the local network to the public internet. By assigning IP addresses, it’s possible to control which users have access to particular resources. IPv4 address ranges are used on private networks where different devices are assigned the same public IP address, while IPv6 address ranges are used to create private networks that are connected to the internet via IPv4.

5. To enable the Internet to work

IP addresses are a set of numbers that are used to identify each device on a network, including the internet. They enable data to be sent and received quickly and accurately by routing information to the right device. Your IP address is assigned to you by your Internet Service Provider (ISP), which is responsible for providing access to the internet. Without an IP address, your device cannot communicate on the network. Your IP address can also change depending on the network that you are connected to, such as when you are traveling and you connect to a different Wi-Fi.

How IP addresses work

IP addresses are essential for ensuring that information is sent and received correctly on the internet. They act as unique identifiers for each device, similar to a mailing address, and ensure that the data requested is received. To understand how IP addresses work, we need to understand the basics of the internet.

The internet is a global network of computers that rely on protocols, or rules, to determine how data is transmitted across the network. These protocols specify how computers should communicate with each other over a network. When you make a request online, the internet uses your IP address to know where to send the request and the associated data.

To access the internet, you need to connect to a network that is connected to the internet. This could be your Internet Service Provider (ISP) for home connections, or your company network for those at work. Your ISP assigns your device an IP address that is used to communicate with the network and to ensure your internet activity goes through the correct channels. Your IP address can change, depending on the network you are connected to – for example, when you travel and connect to a new network such as a hotel or airport Wi-Fi, you will be assigned a new, temporary IP address.

By understanding how IP addresses work, you can make better decisions about online security and privacy, as well as troubleshoot network issues. IP addresses are an essential part of the internet and help ensure information is sent and received correctly.


Some of these questions have been answered in the main article but have been sent in by email. We’ll answer them again in a slightly different way!

What is an IP address?

An IP address (Internet Protocol address) is a unique string of numbers assigned to a device connected to a computer network or the internet. It works much like a regular address, pinpointing the location of any device or system in the network around the world. IP stands for Internet Protocol and is used in the TCP/IP Protocol to help devices, routers, and servers communicate with each other. IP addresses are also used to identify and differentiate the billions of online devices, including computers and mobile phones, and help those devices communicate with one another. IP addresses are broken up into IPv4 and IPv6, and are essential for how the internet works.

So what is network address?

A network address is a type of IP address that is used to identify a specific network or subnet. In IPv4, a network address is typically the first address in a subnet’s range, and it is identified by having all host bits set to 0 in the IP address.

Why are IP addresses necessary?

IP addresses are a necessary tool for modern communication and networking. They are used as a way to identify a device connected to a network and provide a secure connection with other devices. They are also important for providing accurate information on the locations of devices, something that becomes increasingly important in a world where the location of devices matters more and more.

IP addresses allow us to communicate easily with other devices across the internet, enabling us to access websites, stream services, and engage in online activity with greater safety and accuracy. They are also used to identify the source of malicious activity, which helps us to protect our networks and data from malicious attack.

Finally, IP addresses are necessary to help manage the ever-increasing number of microservices, databases, applications and technical advancements. Having accurate IP addresses is key to ensuring the proper functioning of networks and devices, and helps to ensure that all devices are connected properly and able to send and receive data properly. Without IP addresses, this level of connectivity would not be possible.

What is the difference between a static and a dynamic IP address?

Static IP addresses are permanent and remain unchanged, while Dynamic IP addresses change automatically based on available IPs. Static IP addresses are most commonly used for business devices since they keep network connections uninterrupted, while dynamic IP addresses are usually used for devices in home networks and do not require manual input or setup. Static IP addresses are usually assigned by an ISP and require an extra charge, while dynamic IP addresses are assigned via protocols like DHCP or SLAAC which help conserve IP addresses. Static IP addresses are assigned manually, while dynamic IP addresses are assigned automatically.

Why do We Need IP Addresses for the Internet to Function Properly?

IP addresses are essential for the Internet to function properly because they provide a unique identification for every device connected to the network. Without IP addresses, it would be impossible for devices to communicate with one another, and the Internet would not be able to route data packets to their intended destinations.

IP addresses allow devices to exchange information and communicate with each other by providing a way for routers and other networking equipment to direct data packets to their intended recipients. This is critical for the proper functioning of the Internet, as it enables users to access websites, send emails, and engage in other online activities.

Without IP addresses, it would be impossible to locate specific devices on the Internet, and the network would be unable to distinguish one device from another. This would lead to chaos and confusion, making it impossible for users to communicate with one another effectively. Therefore, IP addresses are a fundamental part of the Internet and are essential for its proper functioning.