What is an IP address and how does it even work you ask? Well, I answer that question in this video. I show you exactly how an IP address works, how you get your IP address, and why IP addresses are so important in making the entire internet work. I also talk about how DHCP servers work and why they are important for IP addresses!
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About this video: So, what is an IP address? Well, IP stands for ‘Internet Protocol’, and the Address refers to the number itself. Every device on the internet has an IP address. Just like putting a letter in the mail and addressing it to someone, computers use the unique identifier to send data to specific computers on a network and know where it is supposed to go.
Most networks today use TCP/IP protocol as the standard for how they communicate with each other on the network. In this protocol, the unique identifier for a device on the network is called an ‘IP Address’. That is where the name we all know and love comes from.
There are two standards for IP addresses: IP Version 4 (IPv4) and IP Version 6 (IPv6). All computers with IP addresses have an IPv4 address, and many are starting to use the new IPv6 address system as well. Here’s what these two address types mean:
IPv4 uses 32 binary bits to create a single unique address on the network. An IPv4 address is expressed by four numbers separated by dots. Each number is the decimal (base-10) representation for an eight-digit binary (base-2) number, also called an octet. For example: 216.27.61.137
IPv6 uses 128 binary bits to create a single unique address on the network. An IPv6 address is expressed by eight groups of hexadecimal (base-16) numbers separated by colons, as in 2001:cdba:0000:0000:0000:0000:3257:9652. Groups of numbers that contain all zeros are often omitted to save space, leaving a colon separator to mark the gap (as in 2001:cdba::3257:9652).
So that’s basically what an IP address is, but how does your computer get its IP address?
Well, an IP address can be either dynamic or static. A static address is one that you configure yourself by editing your computer’s network settings. This type of address is rare, and it can create network issues if you use it without a good understanding of TCP/IP.
Dynamic addresses are the most common. They’re assigned by the Dynamic Host Configuration Protocol (DHCP), a service running on the network. DHCP typically runs on network hardware such as routers or dedicated DHCP servers.
These dynamic IP addresses are issued using a leasing system, meaning that the IP address is only active for a limited time. If the lease expires, the computer will automatically request a new lease. Sometimes, this means the computer will get a new IP address, too, especially if the computer was unplugged from the network between leases. This will happen without you even knowing it. That is one of the great things about dynamic IP addresses. They just work.
Nevertheless, I hope you enjoyed this video and it helped you learn what an IP address is and exactly how IP addresses work. If it did, please give the video a thumbs up and be sure to subscribe to the channel if you haven’t already. It really helps us out, and it means a lot!
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