How the internet workes

definations

Web cache server

  1. A web cache (or HTTP cache) is an information technology for the temporary storage (caching) of web documents, such as HTML pages and images, to reduce bandwidth usage, server load, and perceived lag.

IP address

An IP address is a unique string of numbers separated by full stops that identifies each computer using the Internet Protocol to communicate over a network.

URL

A URL is one type of Uniform Resource Identifier (URI); the generic term for all types of names and addresses that refer to objects on the World Wide Web.

ISP

  1. An ISP (Internet service provider) is a company that provides individuals and other companies access to the Internet and other related services such as Web site building and virtual hosting.

DNS

The DNS naming is used in TCP/IP networks, such as the Internet, to locate computers and services through user-friendly name.

project loon

What is a project loon ?

  1. Project Loon is a research and development project being developed by Google with the mission of providing Internet access to rural and remote areas. The project uses high-altitude balloons placed in the stratosphere at an altitude of about 32 km (20 mi) to create an aerial wireless network with up to 3G-like speeds.

How the loon moves ?

winds in the stratosphere are generally steady and slow-moving at between 5 and 20 mph,and each layer of wind varies in direction.


project loon use software algorithms to determine where its balloons need to go, then moves each one into a layer of wind blowing in the right direction .


by moving with the wind, the balloons can be arranged to form one large communication network.

How loon connects ?

Each balloon can provide connectivity to a ground area about 40 Km in diameter at speed comparable to 3G.


Each balloon is equipped with a GPS for tracking its location.

Where the loon is going ?

The project loon started with a pilot in June 2013. Thirty balloons were lunched in new Zealand's south island. The project loon pilot expanded through 2014.
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