Coaxial Cable For Internet

Coaxial cable is the kind of copper cable used by cable TV companies between the community antenna and user homes and businesses. Coaxial cable is sometimes used by telephone companies from their central office to the telephone poles near users. It is also widely installed for use in business and corporation Ethernet and other types of local area network. Now, coaxial cable used to internet networks or computer networks.

Coaxial cable is called "coaxial" because it includes one physical channel that carries the signal surrounded (after a layer of insulation)
Coaxial cable is called "coaxial" because it includes one physical channel that carries the signal surrounded (after a layer of insulation) by another concentric physical channel, both running along the same axis. The outer channel serves as a ground. Many of these cables or pairs of coaxial tubes can be placed in a single outer sheathing and, with repeaters, can carry information for a great distance.
Coaxial cable was invented in 1929 and first used commercially in 1941. AT&T established its first cross-continental coaxial transmission system in 1940. Depending on the carrier technology used and other factors, twisted pair copper wire and optical fiber are alternatives to coaxial cable.

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Computer Networks

Often we hear the word - COMPUTER NETWORKS, actually what COMPUTER NETWORKS?

Computer network is a collection of some of the computers that are interconnected with one another to take advantage of the resources that have together in the same time. A resource or device that we can be used together in the same time, such as hard disk, printer, optical drive, and many other devices.

What is the advantage of the network is Computer? Many! Yes, such is the ease in data management, resource management, maximize resources, ease of management in the computers in the network management, and many more others.

The weakness? In fact the weakness here is relatively small, for example, if on one computer in the network is exposed to the virus, the possibility that other computers in a network is exposed to the virus is very wide, especially what the computers is not protected with a good (anti-virus program installed, etc.).

Tools are needed in building a computer network?

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Definition of Internets

Simply, the Internet is a collection of millions of computers around the world who are connected between the one with the other. Media used to connect through a phone connection, fiber optic (fiber optic), coaxial cable), satellite or wireless connection with.

When we logon (in this case is connected) with the internet, we are given access to other computers around the world who are also connected to the internet. With advances in technology are rapidly increasing, this when the internet can be contacted with a wireless connection from a PC or handheld computer from a notebook.
Once connected to the internet we can do some things, such as: send and receive email, text message with the media or voice, surfing (surfing) on the World Wide Web, or other matters with a particular software application.

The simple ways of the Internet mail system the same as an introduction to the system or parcel, unless the Internet works very fast. For example, when we are in Surabaya we send email to the United States, after we press the Send (Send) before our next email will go to the mail server. (Mail server is usually not the computer that we use are at this time, but part of the service on the Internet, so that we can only exit from the Internet after pressing Send button without disrupting the process of sending the email). Then, our mail server will attempt to contact the mail servers in the United States through route Jakarta - Singapore - Japan - United States, or if the route is busy route can used Australia - United States.

Packet data in the Internet has a certain size so that when email is big enough before we can be divided in several packages and each package can be sent with a different route. Once arrived in the United States, a mail server there will be rebuilding our email into one whole section that is ready presented.

When the satellites used in the route-the route is busy mail server so we will try to send again after some time to actually send. When a maximum of up to 4 minutes more (depending on our mail server settings) email is not sent the email will be sent email notification that we do not.

Route that must be passed the data package on the Internet very long and involve lots of computers around the world, so that when we send the data is personal data and / or important, you should use a secure server, the server is equipped with the encryption of data before sending data to computer facilities and decryption when receiving data packets from another computer.

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Definition of Computer

Definition a computer is a device that accepts information (in the form of digitalized data) and manipulates it for some result based on a program or sequence of instructions on how the data is to be processed. Complex computers also include the means for storing data (including the program, which is also a form of data) for some necessary duration. A program may be invariable and built into the computer (and called logic circuitry as it is on microprocessors) or different programs may be provided to the computer (loaded into its storage and then started by an administrator or user). Today's computers have both kinds of programming.

Most histories of the modern computer begin with the Analytical Engine envisioned by Charles Babbage following the mathematical ideas of George Boole, the mathematician who first stated the principles of logic inherent in today's digital computer. Babbage's assistant and collaborator, Ada Lovelace, is said to have introduced the ideas of program loops and subroutines and is sometimes considered the first programmer. Apart from mechanical calculators, the first really useable computers began with the vacuum tube, accelerated with the invention of the transistor, which then became embedded in large numbers in integrated circuits, ultimately making possible the relatively low-cost personal computer.

Modern computers inherently follow the ideas of the stored program laid out by John von Neumann in 1945. Essentially, the program is read by the computer one instruction at a time, an operation is performed, and the computer then reads in the next instruction, and so on. Recently, computers and programs have been devised that allow multiple programs (and computers) to work on the same problem at the same time in parallel. With the advent of the Internet and higher bandwidth data transmission, programs and data that are part of the same overall project can be distributed over a network and embody the Sun Microsystems slogan: "The network is the computer."

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