!!! Overview When speaking about [Protocol] interactions, the [{$pagename}] is the receiver with [Protocol Client] which must initiate the [Protocol] Exchange.[Example] − Web Server ([{$pagename}]) keeps waiting for requests from [Internet] [Browsers] ([Protocol Client]) and as soon as it gets any request from a [browser], it picks up a requested [HTML] page and sends it back to that [Browser].Note that the [Protocol Client] needs to know the address of the [{$pagename}], but the [{$pagename}] does not need to know the address or even the existence of the [Protocol Client] prior to the [connection] being established. Once a [connection] is established, both sides can send and receive [data] using a [protocol]. !! [RFC 2616] [RFC 2616] defines [{$pagename}] as service requests by sending back responses. Any given program may be capable of being both a client and a server; our use of these terms refers only to the role being performed by the program for a particular connection, rather than to the program's capabilities in general. Likewise, any [server] may act as an [Web Origin] [server], [proxy], [gateway], or tunnel, switching behavior based on the nature of each request.!! More Information There might be more information for this subject on one of the following: [{ReferringPagesPlugin before='*' after='\n' }]