The Shape and Size of Computer Networks and the Positive and Negative Impacts
LAN (Local Area Network)
A network that has a local network that is in the same physical location that can connect computers with other computers using a cable that is connected to a device that is shared. On this network allows users to use printers and storage devices simultaneously, use programs and send messages or e-mail messages to one or more computer users in the same small office.
MAN (Metropolitan Area Network)
This is a version of Lan that is larger and includes such offices in adjacent companies or a city and can be used for personal or public purposes.
WAN (Wide Area Network)
On a computer network this one can cover a very broad geographical, often including a country or a continent.
Benefits of the Internet
In general, many benefits can be obtained if a person has access to the internet. The following are part of what is available on the internet, among others:
Information for personal life
Which include health, recreation, hobbies, personal development, spiritual, and social
Information for professional / worker life
Which include such as science, technology, trade, stocks, commodities, business news, professional associations, business associations and various communication forums.
Components forming an intranet are basically the same as forming components of an intranet, such as:
Browser applications such as Internet Explorer, Opra, Mozilla Firefox, Netscape
Network device
TCP / IP protocol
Server computer
Client computer
Programming languages like html, php, mysql, and others
Developer tools
What needs to be known in addition to the intranet if some of the organization's information is to be exposed so that it can be accessed by outside networks (the internet) is a firewall and router (this internet will become an extranet).
Internet history
In 1969 the United States Department of Defense in the ARPA - ARPANET (Advanced Research Project Agency Network) project demonstrated how to communicate without limitation (infinite distance) through telephone lines using computer hardware and software based on the UNIX Operating System. In the ARPANET project, after the network design was designed with the standardization of reliability and how much information can be transferred to share, a new protocol called TCP / IP (Transmission Control Protocol / Internet Protocol) was formed.
The original purpose of the ARPANET project was actually limited to military needs, at that time a computer network system was made to connect computers to vital areas / regions.
In 1969 the ARPANET initially only connected 4 sites including the Stanford Research Institute, the University of California, Santa Barbara, the University of Utah into an integrated network. Then in October 1972 the ARPANET was generally introduced and soon developed very rapidly throughout the region until the ARPANET had difficulty managing it.
So the ARPANET was split into two parts namely "MILNET" for military purposes and smaller ARPANET in non-military needs. Over time the combination of the two networks became known to the wider community by the name of DARPA Internet and then simplified into the Internet as we know it today. The term internet was first used in 1982 with the development of name servers that allow users to connect to a particular host.
Positive and negative impacts of the internet
The following are Positive and Negative Impacts of the Internet
Positive impact
1. Internet as a communication media, is the most widely used internet function where every internet user can communicate with other users from all over the world.
2. Data exchange media, by using email, newsgroups, ftp and www (world wide web network of web sites) internet users around the world can exchange information quickly and cheaply.
3. The media for finding information or data, the rapid development of the internet, making www as one of the important and accurate sources of information.
4. The ease of obtaining information on the internet so that people know what is happening.
5. Can be used as information land for education, culture, and others
6. Ease of transaction and business in the field of trade so that you do not need to go to the place of offer / sale.
Negative impact
Pornography
The assumption that says that the internet is identical with pornography, is not wrong. With the ability to deliver information owned by the internet, pornography is rampant. To anticipate this, the producers of browser complement their programs with the ability to choose the type of home page that can be accessed. On the internet there are pornographic images and violence that can lead to encouragement to someone to act criminally.
Violence and Gore
Cruelty and violence are also displayed. Because the business and content aspects of the internet world are unlimited, site owners use all kinds of methods in order to 'sell' their sites. One of them by showing things that are taboo.
Fraud
It infectious all aspects. The internet is not spared from fraudsters. The best way is to disregard this or confirm the information you have obtained with the information provider.
Carding
Because of its immediate nature, how to shop using a credit card is the most widely used method in the internet world. The internet criminals also commit the most crimes in this field. With an open nature, criminals are able to detect transactions (using Credit Cards) on-line and record the Card code used. Henceforth they use the data they get for the benefit of their crime.
Gambling
Another effect is the expansion of gambling. With the available network, gamblers don't need to go to a special place to fulfill their desires. You just need to avoid sites like this, because gambling sites are generally not aggressive and require a lot of approval from visitors.