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There are four types of ip address

• Local ip
• Public ip
• Dynamic ip
• Static ip
• Local ip - An external or public ip address is used across the entire Internet to locate computer systems and devices. A local or internal ip address is used inside a private network to locate the computers and devices connected to it is known as local ip.

• public IP address a public ip address that can be accessed over the Internet. Like postal addresses to deliver a postal mail to your home, a public ip address the globally unique ip address assigned to a computing device. Your public ip address can be found at What is my ip Address page .

Dynamic ip- A dynamic IP address is an IP address that's automatically assigned to each connectionof a network, like your smartphone, desktop PC, wireless tablet... whatever.

This automatic assignment of IP addresses is done by what's called a DHCP server A DHCP server assigned IP address is called dynamic because it will often be different on future connections to the network.

The "opposite" of a dynamic IP address is called a static IP address (one that was configured manually).

Static ip - A static IP address is an IP address that was manually configured for a device, versus one that was assigned via a DHCP server. It's called static because it doesn't change. It's the exact opposite of a dynamic IP address, which change. Routers, phones, tablets, desktops, laptops, and any other device that can use an IP address can be configured to have a static IP address. This might be done through the device giving out IP addresses (like the router) or by manually typing the IP address into the device voice the device itself.

Static IP addresses are also sometimes referred to as fixed ip address dedicated ip address.

Another way to think of a static IP address is to think of something like an email address, or a physical home address. These addresses don't ever change - they're static - and it makes contacting or finding someone very easy.

Similarly, a static IP address is useful if you host a website from home, have a file server in your network, are using networked printers, are forwarding ports to a specific device, are running a print server, or if you use a remote access program. Because a static IP address never changes, other devices always know exactly how to contact a device that uses one.

For example, say you set up a static IP address for one of the computers in your home network. Once the computer has a specific address tied to it, you can set up your router to always forward certain inbound requests directly to that computer, such as FTP requests if the computer shares files over FTP.

Not using a static IP address (using a dynamic IP that does change) would become a hassle if you're hosting a website, for example, because with every new IP address that the computer gets, you'd have to change the router settings to forward requests to that new address. Neglecting to do this would mean nobody could get to your website because your router has no idea which device in your network is the one that's serving the website.

Another example of a static IP address at work is with DNS servers. DNS servers use static IP addresses so that your device always knows how to connect to them. If they changed often, you'd have to regularly reconfigure those DNS servers on your router or computer to keep using the internet like you're used to.

Static IP addresses are also useful for when the device's domain name is inaccessible. Computers that connect to a file server in a workplace's network, for instance, could be set up to always connect to the server using the server's static IP instead of its hostname. Even if the DNS server is malfunctioning, the computers could still access the file server because they'd be communicating with it directly through the IP address.

With remote access applications like Windows Remote Desktop, using a static IP address means you can always access that computer with the same address. Using an IP address that changes will, again, require you to always know what it changes to so that you can use that new address for the remote connection.

The opposite of a never-changing static IP address is an ever -changing dynamic IP address. A dynamic IP address is just a regular address like a static IP is, but it's not permanently tied to any particular device. Instead, they're used for a specific amount of time and then returned to an address pool so that other devices can use them.

This is one reason that dynamic IP addresses are so useful. If an isp were to use static IP addresses for all of their customers, that would mean that there'd constantly be a limited supply of addresses for new customers. Dynamic addresses provide a way for IP addresses to be reused when they're not in use elsewhere, providing internet access for many more devices than what would otherwise be possible.

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Static IP addresses limit downtime. When dynamic addresses obtain a new IP address, any user that's connected to the existing one will be kicked off from the connection and have to wait to find the new address. This wouldn't be a wise setup to have if the server is hosting a website, a file sharing service, or an online video game, all of which normally require constantly active connections.

The public IP address assigned to the routers of most home and business users is a dynamic IP address. Larger companies usually do not connect to the internet via dynamic IP addresses; instead, they have static IP addresses assigned to them which do not change.

The major disadvantage that static IP addresses have over dynamic addresses is that you have to configure the devices manually. The examples given above with regards to a home web server and remote access programs require you not only to set up the device with an IP address but also to properly configure the router to communicate with that specific address.