24-Port Managed Gigabit Switch
response to various commands. For example, when you enter
a URL in your browser, this actually sends an HTTP command
to the Web server directing it to fetch and transmit the
requested Web page. The other main standard that controls
how the World Wide Web works is HTML, which covers how
Web pages are formatted and displayed.
Any Web server machine contains, in addition to the Web page
files it can serve, an HTTP daemon, a program that is designed
to wait for HTTP requests and handle them when they arrive.
The Web browser is an HTTP client, sending requests to server
machines. An HTTP client initiates a request by establishing a
Transmission Control Protocol (TCP) connection to a particular
port on a remote host (port 80 by default). An HTTP server
listening on that port waits for the client to send a request
message.
HTTPS
HTTPS is an acronym for H
ypertext Transfer Protocol over
S
ecure Socket Layer. It is used to indicate a secure HTTP
connection.
HTTPS provide authentication and encrypted communication
and is widely used on the World Wide Web for
security-sensitive communication such as payment
transactions and corporate logons.
HTTPS is really just the use of Netscape's Secure Socket
Layer (SSL) as a sublayer under its regular HTTP application
layering. (HTTPS uses port 443 instead of HTTP port 80 in its
interactions with the lower layer, TCP/IP.) SSL uses a 40-bit
key size for the RC4 stream encryption algorithm, which is
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