A computer, or any device that connects to a network (local or internet), must be properly configured to communicate on that network. Since DHCP allows that configuration to happen automatically, it's used in almost every device that connects to a network including computers, switches, smartphones, and gaming consoles.


Because of this dynamic IP address assignment, there's less chance that two devices will have the same IP address, which is common when using manually-assigned, static IP addresses.

Using DHCP makes a network easier to manage. From an administrative point of view, every device on the network can get an IP address with nothing more than their default network settings, which is set up to obtain an address automatically. The alternative is to manually assign addresses to each device on the network.

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Because these devices can get an IP address automatically, devices can move freely from one network to another (given that each device is set up with DHCP) and receive an IP address automatically, which is helpful with mobile devices.

In most cases, when a device has an IP address assigned by a DHCP server, that IP address changes each time the device joins the network. If IP addresses are assigned manually, administrators must give out a specific address to each new client, and existing addresses that are assigned must be manually unassigned before other devices can use that address. This is time-consuming, and manually configuring each device increases the chance of errors.
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