The address of a resource on the Internet. URL syntax is in the
form protocol://host/localinfo, where protocol specifies the means
of returning the object, such as Hypertext Transfer Protocol (HTTP)
or File Transfer Protocol (FTP); host specifies the remote location
where the object resides; and localinfo is a string — often a file
name — passed to the protocol handler at the remote location.
User
Datagram Protocol (UDP)
A standard transport protocol in TCP/IP networking that
provides connectionless service for unacknowledged delivery of
packets. UDP adds port addresses to the service provided by
IP.