"When you install FreeBSD, you are plunged into the wonderful
world of TCP/IP. You may have heard about DNS, ports, RFCs, private
ranges, and subnet masks but may be foggy on what these are and why
you should care. This article will be a primer on the TCP/IP
protocol for the novice and a refresher with some interesting links
for those more seasoned FreeBSD users."
"First off, let's make sure you are clear on what a protocol is.
By definition, a protocol is the rules of communication. If you are
travelling in a foreign country, you need to be aware of the
customs of that country. A gesture that may seem friendly or
insignificant to you may actually be considered an insult in other
parts of the world. Awareness of protocol can save you the
embarassment of miscommunication...."
"TCP/IP is more than a protocol; it is a protocol suite, or
collection of protocols. TCP/IP was designed to allow any operating
system on any type of hardware to talk to any other computer in the
world. This is something we take for granted in the age of the
Internet, but before TCP/IP changed all of the rules, operating
systems, hardware, and protocols were proprietary. Proprietary
means that in order to exchange information with another computer,
it has to be running the same hardware and the same version of the
same operating system, which was provided by the vendor of the
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