Internet

1. What it is

1.1. a network of networks

1.1.1. made up of millions of private, public, academic, business, and government networks of local to global scope

1.2. global system of interconnected computer networks

2. Access

2.1. Wi-Fi

2.2. Fiber Optic

2.3. Satellite and Cellular Technology

2.4. broadband over coaxial cable

2.5. copper wires

3. World Wide Web

3.1. a way to access data using the internet.

3.2. Browsers

3.2.1. Internet Explorer

3.2.2. Firefox

3.2.3. Opera

3.2.4. Safari

3.2.5. Google Chrome

4. History

4.1. Research into packet switching started in the early 1960s

4.2. In March 1990, the first high speed T1 (1.5 mbs) link between the NSFNET and Europe was installed between Cornell University and CERN.

4.3. As of 31 March 2011, the estimated total number of Internet users was 2.095 billion (30.2% of world population).

4.4. In 1993 the Internet carried only 1% of the information flowing through two-way telecommunication, by 2000 this grew to 51%, and by 2007 more than 97% of all telecommunicated information was carried over the Internet.

5. Service Tiers

5.1. Tier 1: large telecommunication companies that exchange traffic directly with each other via peering agreements

5.2. Tier 2: lower level networks buy Internet transit from other providers to reach at least some parties on the global Internet, though they may also engage in peering.

5.3. Bottom Tier: end-users who only access the Internet when needed to perform a function or obtain information.

6. Communication

6.1. Emails

6.2. Internet Telephony