As an internet user, it's important to know what IP is and its basic functions. An IP address, or Internet Protocol address, is assigned to every device connected to a computer network. It consists of a unique sequence of numbers assigned to the network by the internet service provider.
What is an IP address used for? It allows all computers, servers, and even smartphones to communicate online. Additionally, an IP address allows a device to be identified among others connected to the network.
What is an IP address and what is it used for?
Before we dive into its functions, let's explain what an IP address is . In short, it's an identifying number assigned to devices that connect to a network . It's stored as a 32-bit number using four numbers between 0 and 255, separated by periods. An example IP address for a computer might look like this: (216.58.216.154).
Knowing what IP is , we can then look at why it was created and what it is used for.
(The rest of the article can be found below the form)
The sequence of numbers assigned to a given device allows:
- network operation,
- device location,
- device identification,
- exchanging data with other network users.
Your computer's IP address and its functions
To access data shared online, every device and website must have an IP address . What does this mean? Data is routed to its destination using strings of numbers unique to each website and readable by a computer, which, after checking the IP address , can locate it online.
IP also makes it possible to restrict access to a specific website , allowing only users with specific IP address ranges to access the website . What does this mean in practice? Devices with a foreign address will not be able to access the website's content.
IP address and user privacy
The existence of an IP address is also crucial for security purposes – it allows for monitoring network activity, diagnosing technical problems, and detecting unauthorized access . Additionally, a computer's IP address can also be useful for customizing content.
Sometimes, websites can use IP addresses to determine a user's geographic location and display content in a specific language. Therefore, an IP address can further impact a website's local SEO .
What is an IP address, what are its classes and what do they mean?
It's important to know not only what an IP address is , but also what types exist. There are five IP classes, each differing in the number of bits allocated to the host and network portions.
What are Class A, B, and C IP addresses? These are addresses that can be divided into private and public. Class A addresses are assigned to networks that encompass the majority of hosts, Class B addresses are assigned to medium-sized or large networks, and Class C addresses are assigned to small networks.
What is Class D IP? This is a group of addresses known as special addresses, including multicast and multicast addresses. Next comes Class E IP—all experimental and research addresses. These are treated as a reserve.
What is IP used for? Types of addresses
Every network has three types of addresses. What is an IP address and what is it used for?
- network address – serves to identify the entire network,
- broadcast address – involves sending packets through one port to other ports connected to a given network,
- host address – is assigned to each device on the network.
Depending on the address assignment method, computers can be assigned dynamic or static IP addresses . Dynamic addresses are assigned by a DHCP server and are used in corporate and home networks because they are temporary and easy to manage. Static addresses, on the other hand, are assigned manually by the network administrator and are typically used for devices such as servers or surveillance systems.
What is public IP and what is local IP?
While these might seem like two similar terms, they actually refer to slightly different data. So what's a public IP address used for ? It's the device's visible address on the internet to all users. A public IP number is assigned to a computer, modem, or router and allows for its identification on the network.
What is a private IP? Unlike public IP addresses, private IPs are not accessible from the outside and are used to ensure user privacy and security. Such an address is assigned to devices connected to a local network and is used only within it.
What is this IP address – how to check the device's IP?
Finding your IP address is very simple. For a public address, you can do this through a web browser—for example, by typing "ip.lh.pl." Your computer's public IP will appear on your screen.
However, in the case of a private IP, it is enough to check it in the settings of the computer or phone, searching for the appropriate properties.
Online Security Through IP Addresses. What Does It Mean?
When considering what an IP address is and its role, it's impossible not to mention its impact on network security. IP addresses enable network traffic filtering and monitoring , allowing for the quick identification of IP addresses associated with suspicious network activity, such as attempted intrusions, spam, or hacker attacks.
It's also worth noting that IP is also crucial for network administrators, who can use it to register network users. Additionally, IP addresses are useful in various authentication systems , including VPN connections, which protect online identities by hiding IP addresses.
What is a computer's IP and how do I change it?
Now that we've explained what a computer's IP address is , it's time to explain how we can change it. What are the benefits of using a hidden IP address? This will make it harder for anyone to track our online activity, and our privacy will be better protected.
There are several options for changing your IP.
| IP address change method | Advantages | Disadvantages |
| VPN software | great freedom in choosing the number of addresses and their location, fast network connection, data encryption, privacy protection, access to data with regional restrictions | VPN software is paid, prices vary depending on the provider's offers |
| Proxy server | a simple way to change IP, provides a degree of anonymity by hiding the real IP address, protection against attacks and eavesdropping, some servers allow changing geographical locations | usually allows changes only in applications and browsers that support proxy connections, does not fully protect online privacy, no content encryption |
| Tor network | content encryption, IP address hiding, high level of security | no control over the new IP address (randomly selected), need to use a special browser, low connection speed |
| Restart the router | a quick way to get a new IP address | only works with dynamic IP address, no privacy protection |
| Sharing the internet from your phone | a quick and easy way to change your IP address | does not protect privacy, does not allow changing location |
What is an IP address used for?
Knowing what an IP address is and what it's used for can be very useful for every user. People who are aware of their computer's IP address also realize the risks associated with using unauthorized or open networks that don't protect their online privacy.
It's worth remembering that if we're not careful, we can easily fall victim to a hacker attack on our IP address . What does this mean? Scammers exploit IP addresses and user data to obtain confidential information about you.
Knowing what private and public IP is will allow us to better secure our devices and protect our privacy.
IP Address FAQs
An IP (Internet Protocol) address is a unique numerical identifier assigned to devices (such as a computer, smartphone, router, or server) connected to a computer network or the internet. It acts like a digital home address, allowing devices to recognize each other and route data packets correctly.
- A private IP address is used for communication within your local network (e.g., home or business). It allows you to wirelessly transfer files from your phone to your laptop, or print, among other things.
- Your public IP address is your global "passport" on the internet, assigned by your internet service provider (ISP). This address is what all the websites and online services you visit see.
- A static IP is permanent and doesn't change when the network is restarted. It's essential for running your own servers, configuring certain company systems, or for IP monitoring.
- A dynamic IP changes periodically (e.g., every 24 hours) or after each router reboot. This is the standard solution for most home users.
The most common reasons are:
- Privacy Protection: IP masking makes it harder for marketing companies and cybercriminals to track your online activity.
Bypassing geoblocks: Changing your IP allows you to access services, websites or streaming platforms that are blocked in your current country of residence.
Troubleshooting Technical Issues: Sometimes changing your IP address helps if your address has been wrongly blocked by a website (so-called IP ban).
- Using a VPN: This is the most convenient and secure method. A VPN encrypts all your traffic and passes it through a server in your chosen location, completely masking your real IP address.
- Proxy servers: These act as intermediaries for network traffic. They change IP addresses but typically don't offer advanced data encryption, making them less secure than VPNs.
- Reboot your router: If your ISP uses dynamic address assignment, unplugging your router for a few minutes and restarting it may automatically assign you a new IP.
- Tor Network: A highly advanced anonymization tool that repeatedly reroutes and encrypts traffic through random nodes around the world (at the cost of significantly slowing down internet speeds).
This is the simplest part. Simply type "what's my IP address" into Google or visit any dedicated website (e.g., whatismyip.com or ip.verseo.pl). The website will instantly display your public address and its associated geolocation.
Summary
The above article covers the following topics:
- IP address structure,
- the role of the IP address in data routing,
- security and access control, i.e. the ability to filter traffic based on IP addresses,
- a hierarchy of IP address classes, dividing the pool of available numbers into 5 groups,
- three types of addresses within a subnet,
- division of IP addresses into public and private,
- identification of the device's IP address,
- techniques for changing a computer's IP address,
- the importance of IP knowledge for user safety.
