Computer Network and Internet

Computer network (the network) is a system that consists of computers that are designed to share resources (printers, CPU), communicate (email, instant messaging), and access to information (web browser)

Computer Networks Purposes is:

In order to achieve its goal, every part of a computer network to request and provide the service (service). The party requesting / receiving the service are called clients (client) and providing / sending service called servers (server). This design is referred to as client-server systems, and is used in almost all computer network applications.

Two computers each have a network card, then connected via a wired or wireless data transmission medium, and there is a network operating system software to form a simple computer network. If you want to create a computer network wider scope, it would require additional equipment such as Hub, Bridge, Switch, Router, Gateway as interconnection equipment.

Computer Network Concept:

In recent years, computer technology has grown very rapidly. Perkemabangan this rapid technological, associated with other technologies. Especially for the technology of this type of personal computer (PC) to a super computer continues to experience growth, thereby increasing the capacity and data processing. Merger between computers and communication technology affect all the forms of organization of computer systems. Single computer model that serves the entire computational tasks of an organization has been replaced by a collection of computers and a large number of separate but interrelated still in performing their duties. This system is referred to as a network computer (Computer Network).
Computer networks can be defined as a set of interconnected computers. Two computers are said to form a network where they can exchange information. In other words, the computer network is a group of autonomous computers interconnected with each other using a communication protocol through the medium of communication so that they can share information, programs, use of shared hardware such as printers, hard drive and so on. In addition, a computer network can be defined as a system that consists of computers that are designed to share resources (printers, CPU), communicate (email, instant messaging), and access to information (web browser). In order to achieve its goal, every part of a computer network to request and provide the service (service). The party requesting / receiving the service are called clients (client) and providing / sending service called servers (server). This design is referred to as client-server systems, and is used in almost all computer network applications.
Two computers each have a network card, then connected via a wired or wireless data transmission medium, and there is a network operating system software to form a simple computer network. If you want to create a computer network wider scope, it would require additional equipment such as Hub, Bridge, Switch, Router, Gateway as interconnection equipment. Set a communication terminal located in various locations which consist of several interconnected computers. 

Network Internet:

The Internet is a computer network that could be categorized as WAN, connecting millions of computers around the world, without borders, where everyone who has a computer can join the network by simply connecting to the internet service provider (Internet service provider / ISP)
 Internet can be translated as the international networking (international network), for connecting computers internationally, or as internetworking (tissue between networks) for connecting millions of networks around the world. Internet, a network that is so complex but it was amazing.

Internet network logically divided into multiple domains, which by the standards of IPv4 (Internet Protocol version 4) is identified by IP number or 4 32-bit binary numbers separated by dots (eg 192.168.10.25). Standard domain types include:

. com = commercial organizations
. edu = educational institutions in the United
. ac = academic institutions
. gov = government institutions
. mil = military organizations
. net = network access provider
. org = non-profit organizations

Beside the domain that is also shared by the state, for example:

. au = Australia
. ca = Canada
. id = Indonesia
. jp = Japan
. my = Malaysia
. sw = Sweden
. th = Thailand  

How to Connect Computers with Internet Network

How to Connect Computer with Internet network is as follows:

1. Through the Network
To connect a computer with a large network can use smaller networks that LAN.cara connecting computers to the Internet through a network used to serve usage amounts banyak.contoh cafes, colleges, schools, public and private companies and other-lai.
Liaison with the network system is to use a computer as a server connected to the internet service provider via telephone either wired or non kabel.Sistem network has the advantage that access charges incurred will be less expensive, because the cost will be divided by the number of access users.

2. Through direct telephone line
Another connection system is to dial up directly, where the modem directly connected to the telephone network that connects to the Internet network. Excess Access is a network that broad. while drawback is the relatively high cost of access.

3. Through GPRS 
GPRS stands for General Pocket Radio is a radio Service. network as connecting computers to the network using radio waves as internet. with computer connecting to the network using radio waves internet. with then access with GPRS it has the advantage of access can be executed even though the means of communication or de active. within user access based costing much data is accessed without access. and limited amount of time to be able to access through GPRS only do computers and mobile phones are equipped GPRS. shortage facility of GPRS is to get an internet connection, we have to pass a certain setting on the phone, but every brand mobile phones and mobile operators have the own way to activate GPRS.

4. Through WiFi (Wireless Fidelty)
WiFi is a wireless network that use waves with high frequency (2.4GHz). Using WiFi we have to have a notebook and a PDA equipped with a WiFi card is smoothly speed WiFi. excess high access is 11Mbps. while lack of WiFi is a must use located in areas that have a WiFi signal (Regional Hot Spot)


5. Using Cable TV
 The advantages of the use of cable TV networks for Internet access is that we can access the internet at any time without any interruption telephone network entirely
Terms access internet via cable TV, among others:
a. Subscribe to the cable TV service providers have internet service
b. The device is equipped with a standard computer operating systems and other software that supports internet access.
c. Using a modem specifically designed for cable TV.

How Computer Networks Work

How Computer Networks Work - The computer network is a system that consists of computers and other network devices that work together to achieve a common goal. The purpose of the network is the computer:
 
Sharing of resources: for example, shared use of printers, CPU, memory, hard drive

The principle works, first sender to send information to the receiver via a signal encoded protocol that converts the digital signal into an analog signal and then transmitting the signal through the media and through the second protocol decoded back into digital signals before going into the receiver.

How Computer Networks Work

There are four main components that are on a network:

1. Sender (sender of data information) 
2. Protocol (which encode and decode the data information) 
3. Transmission media (data transfer medium), and
4.  Receiver (receiving data information).

The working principle above can in analogy when the Japanese and the English were chatting over the internet. When the Japanese typing a message in Japanese language the message is first converted by the protocol into English so that English people can receive the message in English and vice versa when the British reply to the message is the message the Japanese English language will be changed by the protocol first become a Japanese language prior to the Japanese people. So in this case protocols can be termed as a translator of information data.

Types of Computer Networks and His understanding

Types of Computer Networks and the His understanding - Computer network is a system or circuit that consists of two or more computers, where between one computer to another computer connected by a communication system, allowing any computer joined to the network can exchange -exchange data, programs, and other computer resources such as storage media, printers, and others.

Also through a computer network that connects computers located in remote locations, can also be established communication, such as communication via electronic mail or email, or upload the data to send and retrieve data from another place called the download. Other activities related to data communications, can also be done over the computer network.

Types of Computer Networks and His understanding

On this occasion will be published the types of computer networks and the understanding that based karaterianya can be divided into 4 parts, which are:

1. Based on the geographic range is divided into:
LAN Networkis a network that connects two computers or more in coverage such as laboratories, offices, and in one cafe.
MAN NetworksIs the tissue that covers the major cities and their local area. Examples of local telephone networks, cellular telephone systems, as well as some ISPs relay networks.
WAN NetworkIs a network with worldwide coverage. Examples PT network. Telkom, PT. Indosat, as well as Satelindo GSM Mobile, Telkomsel, and much more.
2. Based on the distribution of sources of information / data can be divided into:
Centralized networkThis network consists of client and server computer where the client computer that serves as an intermediary to access sources of information / data from one computer server
Distributed NetworkIs a combination of several centralized network so that there are multiple server computers interconnected by a network client to establish a specific system.
3. Based on data transmission media can be divided into:
Wired Network (Wired Network)In this network, to connect one computer to another computer in the form required connecting a network cable. Cable network functions to send information in the form of electrical signals between the network computer.
  Wireless Network (Wireless Network)Is a network of the medium in the form of electromagnetic waves. In this network cables are not required to connect between computers because it uses electromagnetic waves will transmit signal information between networked computers.
4. Based on the role of computers in the Process Data
Client-Server NetworkIn this network there are one or more computer servers and client computers. The computer that will be the server computer and a client computer and changed through software on the network protocol. Client computer as an intermediary to be able to access data on the server computer while the computer server providing the information required by the client computer.

Network Peer-to-peerIn this network there are no computer client or server computer for all computers can do the delivery and receipt of information so that all the computers to function as a client as well as server.
Thus articles on a variety of computer networks that have been published along with the meaning of each of these types of computer networks. Hopefully this information is probably useful. 

Advantage Internet For Teenagers

Benefits of the Internet For Teens - It is the season of youth who are full of beauty, that's the word for people who get drunk again in the beauty of the world. But unlike teenagers who can take advantage of when his young life.

Benefits of Internet For Teenagers:

1. Public BenefitsBased on in depth in the United States prove that surfing the internet, playing online games, and social networking sites play just as well for the development of youth. Digital Youth Project sponsored by the MacArthur Foundation for three years proved the internet is good for adolescent development. The project, conducted over three years that involved 800 teens and parents to know youth technology upgrades. It also broke the assumption that parents who declare Internet playjust a waste of time.
2. Benefits of the Internet in EducationThe Internet is a service that allows us to add insight, communication, and also allows us to look for a material that may be hard to find in practice. through cyberspace internet access, we can add insight, communicate over long distances and also seek information which we desperately need. In the world of internet education can help students to access a variety of information and sharing of knowledge and research antarsiswa especially with their distant homes.
3. Negative ImpactInternet, word familiar in the ears of every person, especially the teenagers who always hang out with the luxury world of tech, luxurious, and practical, the Internet can be found wherever we are, to capitalize mobile phone that has an internet connection, the internet can be accessed with ease through mobile phone wherever you are, or if not, at every corner there is definitely a shop that sells internet services or commonly called the cafe, with the internet, or access roads to the delivery of information existing in the world can be taken with ease while reverse hand or blink, much of science is so abundant there, any information we can find in the internet universe, the teens are not spared by the name of information and knowledge, this internet is the most effective and easy to find and accessible by anyone anywhere, although there is no doubt that because of this freedom possible misuse of internet facilities as well as a means of crime or misconduct.
Students new to the internet usually use this facility to search for weird things. Such images are not indecent, or weird videos obscene others that may affect the lives and personalities of the students themselves, so that students are influenced and interfered with her concentration on learning in school, however, not all students do so, simply nosy just a handful of students who can do it because of lack of a sense of responsibility towards self and surroundings, but in general the Internet is used by each student to seek or obtain information.It can be a motivator for students to grow and can also serve as a destroyer (the younger generation), teens are creatures that are vulnerable to changes around him, he will follow the most dominant are close so the possibility of a drastic change in the period- adolescence would lead to where the teenager will run, positive or negative direction depending on where in the start.
Teens who daily along with internet will be more responsive to changes in the surrounding information because it is familiar and more aware of this information and more often than others. But other than that, teenagers who have a tendency on the negative just the opposite, he will appear as only passiveenslaved by the ease and wealth of information from the internet.
So if you can always watch your children play in order to have all the "benefits of the Internet For Teenagers" is more pronounced.

5 Benefits and Advantages of Internet

It's hard to imagine that life without Internet of sophisticated as it is now, but the amazing thing is the effect of the Internet on our lives. Believe it or not but there are still many people who do not even have a PC and connected to the internet, but now that number has decreased every year. This brings us to the idea that the internet in addition to having a negative impact but also be useful in this era of internet technology,


This is just some of what I call the "benefits" Internet era advancement of internet technology. Productivity and personal benefits that the Internet has given to the world is extraordinary. This list is not intended to be comprehensive but these are some of the benefits of my favorite internet. Here are 5 benefits and advantages of the internet.

1. Communication Equipment
Communications to differentiate into 3 parts: face to face meetings, phone conversations, and chat or mail, email is a very popular method of communication now, because this method does not directly most people prefer this method because we can choose to respond or not - and could convey your message without having face-to-face or communicate directly.

2. Online Banking
If you have not started banking online, you should definitely consider it again, the reason for doing online banking is very much, such as: You do not have to constantly write checks to pay your bills, licking envelopes, and buying stamps. You can easily pay regular bills with a few clicks and payments will be made electronically on the day to avoid late fees.

3. Search (Searching)
One day when you want to learn more and find out about the topics or news - specific news of course you would open a book, encyclopedia or dictionary, but not all the information we can find in any book or dictionary, now with the internet we can find fast search engine that can give us thousands of links based on certain keywords. or search engines like Google, yahoo, etc,

4. Shopping online
You can always find them online. if you can not find A brand clothes, shoes brand B and for other needs at the local shops why do we not try to find it online at the online store website has now mushroomed and fads may Shopping through Online Stores in today , the possibility of the need that you want can be found online without having to leave the house.

5. Marketing the product
With the popularity of the internet, there has been an explosion in online content, As a result of this there is a great advantage in marketing your products, and this is a tremendous opportunity in the online world and we could Seeking additional income through the Internet. For example, when you install the print ads mediated effort. How do I get more readers can find out more detailed profile of the products you sell, while a limited scope and course website as ingredients. While more effective and will facilitate the sale, prospective customers finding out what you have to offer, as well as the business will look more professional and not only limited to local sales only. But all over Indonesia or even international.

Advantages of Internet for Businesses

advantage of the Internet for Business is as follows:

CapitalThe capital required to build an online store is relatively small compared with the conventional business. To build a business / conventional business, we must have the capital to purchase / lease the place, remodeling, furniture, and others. And if you want to establish a branch in another place, the costs involved will also be double fold. While in E-Commerce, you simply pay for the services to build a website that is considered very low if compared with the initial capital must be spent to open a store.

Time EnterprisesBy using this website, you can go to the store non-stop 365 x 24 hours! Promotion of products and services can be displayed continuously. You do not need to pay expensive advertising costs calculated per second impression. The booking process can be done at any time either working day, Saturday / Sunday, as well as the big day. Nothing says holidays, vacation or sick leave for the online store! Even if you are asleep, your online shop remain faithful to work for you!
Business coverageConventional business is very limited by space factor. Your market would also be localized, even in the distance / range is very limited in certain areas only. While in E-Commerce, your business will not only have a regional market, it can even reach across the country and an opportunity to be an international business!
Operating CostsRoutine expenditure to be incurred by a conventional business is certainly not small. Good for venue rental costs, employee salaries (particularly if the number of employees you a lot), the cost of electricity and water, the cost of stationery (ATK), and others. Meanwhile, to maintain an online store, you can simply pay an annual fee which is considered very very cheap!
Interactive MediaGraphic design, text, image, voice, and video on the website is able to display information about products and services with a very complete and interesting, without requiring a cost / cost of printing brochures, or through various other mass media. For example, for advertising in radio, newspaper or television, the more information you put on them, the greater the cost that you need to spend. As for the website, the amount of information you can enter very much, even not limited to (depending on your hosting capacity). The information you enter will also be changed at any time according to your needs, for instance when there is a new product launch or price changes, and so forth. Thus, the actual website is much more interactive and, in addition to helping you save your cost!

Internet Definition According to the Experts

Internet Definition According to the experts interconnection-networking Internet is a global system of the entire network of computers connected together using the standard Internet Protocol Suite abbreviated as TCP / IP that allows you to serve the entire civilized world.

From the perspective of history, the Internet is a computer network that was first established by the U.S. Department of Defense in 1969, through a project called ARPANET (Advanced Research Projects Agency Network).

At its establishment, the ARPANET only connect 4 sites only, namely the Stanford Research Institute, University of California, Santa Barbara, and the University of Utah, where each site is to form a unified network in 1969 and then generally introduced in 1972 .

 Internet Definition According to the Experts

 

 

To find a scientific understanding of the internet, it helps us listen to experts opinion on the definition of Internet, and the following are excerpts from some expert opinion on the definition of the internet:

1. According to Lani Sidharta (1996): although it is the interconnection between networks fisikInternet komputernamun general Internet should be seen as a resource of information. Internet content is information, can be thought of as a multi-media library database or a very large and complete. Even the Internet is seen as the world in the form of another (virtual) because almost all aspects of life in the real world on the internet such as business, entertainment, sports, politics and so forth.

2. According to Drew Heywood (1996): the history of Internet began in the late decades of the 60's when United StatesDepartment of Defense (DoD) requires a new standard for Internet communications working. That is the standard that is capable of connecting all types of computers in the DoD with the military contractor's computer, scientific research organizations and universities. This network must be robust, secure and lasting damage that can operate in conditions of minimum due to disaster or war.

So some experts say internet definitions that can be delivered to you at the article entitled DefinisInternet According to the experts this. I hope this information is useful for those who would have the time to read it.

Definition and Function of the Network Card

Network card or called NIC that we often see on almost any computer or laptop, a card jarningan that serves as a bridge from the computer to a computer network. NIC type outstanding, divided into two types, namely the physical NIC and NIC that is logical. An example of a physical NIC is NIC Ethernet, Token Ring, and more, while the NIC that is logical is a loopback adapter and Dial-up Adapter. Also called Network Adapter. Each type of NIC is numbered addresses called MAC Address, which can be static or can be changed by pengguna.d) Network Interface Card (Network)
 

 
A network card (LAN Card) installed on a server or workstation computer so that the computer can be connected to the network system. In the event of disruption or damage resulting network card on the computer can not enter in the network system. Indicators that can be seen in the network card is dead damage indicator lights located on the network card and the indicator on the hub / switch when the computer has been living and cable connectivity of the network card and hub / switch has been good.

Types of Computer Network Topology

Computer Network Topology 

1. Understanding Topology BUS
Bus Topology is a topology widely used in the cable uses sepaksi mushroomed. By using T-Connector (with a 50 ohm terminator at the end of the network), then the computer or other network devices can be easily connected to each other.

Excess 

• Save cables
•  Layout simple cable 
• easily developed

Shortage

• Detection and isolation of faults are very minor 
• Traffic density 
• If one client is broken, then the network can not function. 
• Required repeater for long distance

2. Understanding Topology RING
Token-ring method (often called the ring anyway) is how the computer so that the ring-shaped (circular). Each node has the same degree. The network will be referred to as a loop, the data is sent in each node and any information received nodes examined whether the data address for him or not.

Benefit 

• Save Cables

Costs 

• sensitive errors 
• Develop a network of more rigid

3. Understanding Topology STAR
Centralized control, all links must pass through the center channel all these data node or client of choice. Stasium called primary central node or server and the other is called secondary station or client server. Once the network connection initiated by the server, each client server sometimes can use a network connection without waiting for orders from the server.

Advantages: 

• most flexible 
• Installation / changing station is very easy and does not interfere with other parts of the network 
• centralized control 
• Ease of detection and fault isolation / damage 
• Ease of network management

Disadvantages: 

• cable loss 
• Need special handling
•  Centralized control (HUB) so critical element 

4. Understanding Topology Tree
Topology Tree (Tree) is a combination of characteristics between star topology and bus topology. This topology consists of a collection of star topology are connected in a bus topology as the backbone. Computers connected to the hub, while the other hub connecting the spine or backbone path. 

Advantages:

• Can the formation of a group that is required at all times. For example, companies can form a group consisting of terminal bookkeeping, as well as the other groups formed for the sales terminal.

Disadvantages:

• If the node is higher then not working, then other groups that are below it eventually becomes ineffective. The workings of a tree network is relatively slow. 

Advantages:

• Relationship dedicated links to ensure the data is sent directly to the destination computer without having to go through other computers so that they can more quickly because of the link is used exclusively for communicating with the destination computer only (not used beramai-ramai/sharing). 
• Robust properties, ie the event of disruption in the connection of computer A with computer B because of damage to the cable connections (links) between A and B, then the interference will not affect A computer connection with other computers. 
• Privacy and security in mesh topology more secure, because the communication that occurs between the two computers will not be accessible by other computers.
•  Facilitate the process of identifying the problems in the event of damage to connections between computers.

Disadvantages:

• Requires a lot of cable and port I / O. more and more computers in the mesh topology is needed more and more cable links and port I / O (see calculation formula needs wiring and Port). 
• It is at once also indicate that the topology of this type * Because each computer must be connected directly to another computer then the installation and configuration becomes more difficult. 
• The number of wires used also suggests the need for space that allows in the room where the computers are located. 

5. Topology Peer-to-peer Network
 
Peer meaning colleagues. Peer-to-peer network is a computer network consisting of multiple computers (usually no more than 10 computers with printers 1-2). 

In the preferred system of this network is the use of the program, data and printers together. Users can use the computer named Dona program installed on the computer Dino, and they both can print to the same printer at the same time. Network system can also be used at home.  

Computer users who have computers 'old', eg AT, and want memberli new computer, say Pentium II, no need to throw away old computers.  

He simply install a second network card in the computer and then connected by special cables used for network systems. Compared with the three methods, the system is much simpler network that is easier to learn and use.