The Importance Of Network Security

Since the rise in popularity of the Internet, we have started to use our computers for a much wider range of tasks than ever before. At home, we buy our groceries, do our banking, buy birthday presents, send communications via email, write our life story on social networking sites; at work, our businesses provide e-commerce via websites, staff send and recieve emails, phonecalls and video conferencing are done through the network using IP based servcices; all of this is done online and it would present a serious security threat if it wasn't for the fact we have various security measures at our disposal. I would like to cover some basic examples of how network security helps to keep us safe online, both at home and in the workplace.

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Map projection

A map projection is any method of representing the surface of a sphere or other three-dimensional body on a plane. Map projections are necessary for creating maps. All map projections distort the surface in some fashion. Depending on the purpose of the map, some distortions are acceptable and others are not; therefore different map projections exist in order to preserve some properties of the sphere-like body at the expense of other properties. There is no limit to the number of possible map projections.
 

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Cartography

Cartography (from Greek , chartes or charax = sheet of papyrus (paper) and graphein = to write) is the study and practice of making maps. Combining science, aesthetics, and technique, cartography builds on the premise that reality can be modeled in ways that communicate spatial information effectively.

The fundamental problems of traditional cartography are to:

• Set the map's agenda and select traits of the object to be mapped. This is the concern of map editing. Traits may be physical, such as roads or land masses, or may be abstract, such as toponyms or political boundaries.
• Represent the terrain of the mapped object on flat media. This is the concern of map projections.
• Eliminate characteristics of the mapped object that are not relevant to the map's purpose. This is the concern of generalization.
• Reduce the complexity of the characteristics that will be mapped. This is also the concern of generalization.
• Orchestrate the elements of the map to best convey its message to its audience. This is the concern of map design.

Modern cartography is closely integrated with geographic information science (GIScience) and constitutes many theoretical and practical foundations of geographic information systems.

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IP Address

An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing. Its role has been characterized as follows: "A name indicates what we seek. An address indicates where it is. A route indicates how to get there". The designers of the Internet Protocol defined an IP address as a 32-bit number and this system, known as Internet Protocol Version 4 (IPv4), is still in use today. However, due to the enormous growth of the Internet and the predicted depletion of available addresses, a new addressing system (IPv6), using 128 bits for the address, was developed in 1995, standardized as RFC 2460 in 1998, and its deployment has been ongoing since the mid-2000s.

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Uniform Resource Locator (URL)

In computing, a uniform resource locator (URL) is a specific character string that constitutes a reference to an Internet resource.

A URL is technically a type of uniform resource identifier (URI) but in many technical documents and verbal discussions URL is often used as a synonym for URI.
 

History

 
In computing, a uniform resource locator (URL) is a specific character string that constitutes a reference to an Internet resource. A URL is technically a type of uniform resource identifier (URI) but in many technical documents and verbal discussions URL is often used as a synonym for URI.
 

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