Why has my IP address changed?
The IP addresses are given to us by an Internet Service Provider (ISP), who is often a cable provider like Time-Warner Cable, Cox Communications, or a phone company like AT&T. The moment you open an account with an ISP, they will immediately give you a special IP address.
You will be able to connect your computer and modem to their network and access the Internet after the ISP visits your home to install your connection. When you launch a Web browser to conduct a Google search or send an email, and everything goes smoothly, you can be sure that everything is functioning as it should. If it initially doesn't work, you might need to engage with your ISP's technical support team to have things resolved.
The majority of users are fortunate that this whole technical thing takes place in the background. That is because modern technology is so advanced that getting everything to function and putting in the necessary effort doesn't take very long. All of it is sorted out by your computer's networking hardware, modem, and comprehensive TCP/IP networking software. Nearly "plug and play."
Regarding "your" IP address.
When you establish a new connection, one of the initial things you could do is to check your IP address. Please take note of the IP address, but avoid becoming overly attached because it's possible that your ISP uses a dynamic IP address, that means it could change without warning. (It may not happen, but it could.) It could be known to as a static IP address-unchanging-if it weren't a dynamic IP address.
Why is changing necessary?
It is solely a numerical issue. There are a countless number of computer users connected to the Internet simultaneously all over the world. Some people use the Internet frequently, while others only occasionally, and occasionally only long enough to write an email.
Every person who is available on the internet needs a distinct IP address, as was already mentioned. When you consider all the logistics involved, it would have been extremely costly to assign a fixed, static IP to each and every ISP subscriber. Additionally, the number of static IP addresses might have quickly run out with the current IP address generation (officially known as IPv4).
Dynamic IP addresses were subsequently introduced to the world of the Internet. This made it possible for ISPs to give their customers a dynamic IP address as needed. Every time you go online, that IP address is essentially "loaned" to you.
Additionally, it made it possible for organizations with extensive networks to reserve static IP numbers so they could avoid the headache of managing several IP addresses for their enterprises. (The IT departments have additional means of differentiating the machines on their network.) Although it is theoretically a dynamic IP address, you'll find that it doesn't change the majority of the time. However, there are times when you change your router, it changes.
If you're a regular computer user, dynamic IP addresses end up making things simpler for your ISP. If you choose to relocate across the city, you can continue using the same Internet service provider without having to undergo the trouble and administrative work of reconfiguring your "permanent"/static IP address. Instead, a dynamic IP address that is portable is simply provided to you automatically.
Using a dial-up modem
Every time you use a modem to access the internet, you will be given a unique IP address that is currently available. Every time you connect, even though you could receive the very same IP address as a prior connection, this is not always the case. You must have a broadband connection to access the Internet if you want a static (non-changing) IP address.
Consumers of broadband connection
When using broadband to access the Internet, as opposed to a dial-up modem, you are assigned a static IP address that remains constant over time. Nevertheless, this address is subject to change; a few possibilities are listed below.
When using the same WiFi or device in different locations, does the IP address change?
Not necessary because it will alter as you walk. Let us see a brief example of an IP address from real life (IPV4).
1) Keep in mind that IP Addresses are not sufficient on their own.
2) Therefore, you will undoubtedly need to alter the host's IP address if the host (to which the IP address was allocated) moves along with the router's IP address and subnet mask (as when you connect a device to a new network).
3) Simply put, you do not need to reset your IP address if you are using a laptop to connect to wifi and move from one location to another inside the same wifi's coverage area.