Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) servers are optional and are only used if they are available on the network.Devices can disconnect from the network automatically without leaving state information.

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Each device must implement a DHCP client and search for a DHCP server when the device is first connected to the network.

If no DHCP server is available, the device must assign itself an address.

Universal Plug and Play (UPn P) is a set of networking protocols that permits networked devices, such as personal computers, printers, Internet gateways, Wi-Fi access points and mobile devices to seamlessly discover each other's presence on the network and establish functional network services for data sharing, communications, and entertainment.

UPn P is intended primarily for residential networks without enterprise-class devices.

No special device driver support is necessary; common network protocols are used instead.

Each UPn P product can have device-specific services layered on top of the basic architecture.

UPn P uses UDP due to its lower overhead in not requiring confirmation of received data and retransmission of corrupt packets.

HTTPU and HTTPMU were initially submitted as an Internet Draft but it expired in 2001; The foundation for UPn P networking is IP addressing.

The process by which a UPn P device assigns itself an address is known within the UPn P Device Architecture as Auto IP.