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Chapter 3

BUS 252 Chapter Notes - Chapter 3: Hypertext Transfer Protocol, Intranet, Xml

Course Code
BUS 252

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Chapter 3: Evolution and Application of the Internet
The internet is a network of loosely connected networks whose size and number of users are growing
The internet works over virtually any type of connection ranging from dedicated fiber-optic cables to
coaxial cables to telephone lines to satellite connections.
The internet connects uniquely numbered computing devices that relay information from one point to
point using the Internet Protocol (IP).
IP is a set of rules for sending and receiving messages at the internet address level. It was created to
provide a mechanism for routing data packets to its destination. The most common protocol used in
addition to IP is the Transmission Control Protocol (TCP). TCP uses a set of rules to exchange messages
with other internet points at the data packet level.
IP provides the addressing system that enables computers to be logically connected so they can send
messages to each other, while TCP provides the mechanism for subdividing the information being sent
into small packets and correctly re-assembling those packets of information at their destination.
Internet was formed in 1968 by the US Defense Advance Research Projects Agency (DARPA). The
intention was for sharing research and development work among corporate, academic, and government
The numbering scheme for the IP addresses in use before the wide use of Internet was IPv4, that
permitted 232 unique addresses. However, as the internet exploded, a new IP system was introduced
called IPv6, which permits 2128 unique addresses.
Internet IP addresses grew in size from 232 to 2128
Packet switching: A method of transmitting data by breaking it up into small segments, or packets, and
sending the packets individually in a stream.
This is based on the TCP/IP
The Internet Architecture Board (IAB) and Internet Society (ISOC) controls and maintains the standards
of the Internet.
Electronic Mail
Email continues to be the most important internet application.
The most widely used protocol today is POP3, which stands for Post Office Protocol 3. Other commonly
used protocols are IMAP, MINE and SMTP.
The World Wide Web (WWW)
This is the second most important internet application after e-Mail.
The internet can be viewed as a very large client-server network, and is often discussed in those terms.
HyperText Markup Language (HTML)
find more resources at oneclass.com
find more resources at oneclass.com
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