Workshop

socket 80 of the TCP/IP address 167.195.160.9). Socket 80 is the standard socket for Web services,
called HTTP (Hypertext Transfer Protocol).
HTTP is the name of the service that is usually offered at socket 80 by the program that lives there.
However, HTTP also refers to the set of rules that allow for Web transactions that Web servers and
browsers attempt to follow. It’s important to understand that there are two definitions of HTTP here: the
socket name (as in “socket 80 is the socket typically used for HTTP”) and the protocol, itself (as in “All
Web servers need to follow the HTTP protocol to ensure error-free operation”). Many other protocols and
services have this dual reference as well—for example, SMTP, which refers both to socket number 25
(typically used for mail services) as well as the Simple Mail Transfer Protocol’s rules of engagement.
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