Definition, advantages and disadvantages of LAN
By : UnknownCommonly abbreviated Local Area Network LAN is a computer network that covers only a small area networks, such as campus computer networks, buildings, offices, in homes, schools or smaller. Currently, most LANs based on the IEEE 802.3 Ethernet technology using a switch device, which has a data transfer speed of 10, 100, or 1000 Mbit / s. In addition to Ethernet, the current technology is 802.11b (or so-called Wi-Fi) is also often used to form a LAN. Places that provide LAN connectivity with Wi-Fi technology is commonly called a hotspot.
On a LAN, each node or computer has the computing power of its own, different from the concept of terminal dump. Each computer can also access resources on the LAN in accordance with the permissions that have been set. Such resources can be either data or devices such as printers. On a LAN, a user can also communicate with other users by using the appropriate application.
In contrast to Wide Area Networks or Wide Area Network (WAN), the LAN has the following characteristics:
1. Rapidly have higher data
2. Covers a narrower geographical area
3. Do not require leased telecommunication lines from the computer operator telekomunikasiBiasanya one of the computer's network server that will be used to manage all the systems in the network.
Excess LAN:
LAN can be connected in various ways such as pair cable, fiber optic, telephone cables, and infrared light, and radio signals. Configuring connectivity between multiple computers known as topology. Each topology needs to implement cooperation are commonly encountered in the network, a message from one computer to another computer or user in order to perform tasks that are stored in the network
LAN Disadvantages:
LAN can only connect a number of computers that are in a particular area such as a campus, in a building, and in a space that is often associated with a minicomputer. However, rarely LAN covers more area than a single building.
On a LAN, each node or computer has the computing power of its own, different from the concept of terminal dump. Each computer can also access resources on the LAN in accordance with the permissions that have been set. Such resources can be either data or devices such as printers. On a LAN, a user can also communicate with other users by using the appropriate application.
In contrast to Wide Area Networks or Wide Area Network (WAN), the LAN has the following characteristics:
1. Rapidly have higher data
2. Covers a narrower geographical area
3. Do not require leased telecommunication lines from the computer operator telekomunikasiBiasanya one of the computer's network server that will be used to manage all the systems in the network.
Excess LAN:
LAN can be connected in various ways such as pair cable, fiber optic, telephone cables, and infrared light, and radio signals. Configuring connectivity between multiple computers known as topology. Each topology needs to implement cooperation are commonly encountered in the network, a message from one computer to another computer or user in order to perform tasks that are stored in the network
LAN Disadvantages:
LAN can only connect a number of computers that are in a particular area such as a campus, in a building, and in a space that is often associated with a minicomputer. However, rarely LAN covers more area than a single building.
Understanding The Topology and The Types
By : UnknownNetwork
topology is a section that describes the relationship between computers
that were built based on usability, resource constraints and cost
limitations, network topologies means that there can be tailored to the
circumstances on the ground.There is some form of network topology as follows.
1. Bus TopologyThis topology is the initial topology is used to connect a computer. In this topology each computer will be connected to a long cable with a terminal, and at the end of the Kable must end with a terminator. This topology is very rarely used in building a network of ordinary computers because it has some shortcomings such as its collision possibility of a data stream, if one device is broken or there is damage to one part of the computer network will not function immediately before the damage is solved.
Figure bus topologyThis topology uses Kable Coaxial initially as a medium of instruction data and information. But at the moment this topology in computer networking by using cabal fiber optic (fiber optic), but combined with other network topologies to maximize performance.
2. Ring TopologyAtay ring topology is often called the ring topology is a network topology in which each computer connected to make a circle. With a sense every computer that is connected into a network of inter-connected to two other computers to form a network similar to the shape of a ring.
The advantages of this topology is the cable used can be saved. But the lack of this is the development of the network topology will be difficult because each computer will be connected to each other.
3. Token Ring topologyThis topology is similar to the ring topology but making more perfected. Can be seen from the difference image.
4. Star TopologyStar topology or more often called star topology. In this topology we have to use another tool to help connect computer networks. Examples of tools in use here is a hub, switch, etc..
The advantage of this topology is very much all of them allows admin to manage the network, allowing the addition of a computer or terminal, ease of detecting defects and errors in the network. But with its many advantages in terms of topology is not without shortcomings. The drawback to such extravagance cables, centralized control on the hub sometimes be critical problems that in case of damage to the network hub, then all will not be in use.
5. Tree TopologyTopology also called tree or hierarchical topology and can also be called a multilevel topology is a topology that can be used on the network in the multi-storey office space.
The central hub or who are at the very top is the active central central while underneath is a passive central.I got here a little pemaran in this article and I will continue in the next article with great jariangan to build, and how penanggulangnan problems on the network.
1. Bus TopologyThis topology is the initial topology is used to connect a computer. In this topology each computer will be connected to a long cable with a terminal, and at the end of the Kable must end with a terminator. This topology is very rarely used in building a network of ordinary computers because it has some shortcomings such as its collision possibility of a data stream, if one device is broken or there is damage to one part of the computer network will not function immediately before the damage is solved.
Figure bus topologyThis topology uses Kable Coaxial initially as a medium of instruction data and information. But at the moment this topology in computer networking by using cabal fiber optic (fiber optic), but combined with other network topologies to maximize performance.
2. Ring TopologyAtay ring topology is often called the ring topology is a network topology in which each computer connected to make a circle. With a sense every computer that is connected into a network of inter-connected to two other computers to form a network similar to the shape of a ring.
The advantages of this topology is the cable used can be saved. But the lack of this is the development of the network topology will be difficult because each computer will be connected to each other.
3. Token Ring topologyThis topology is similar to the ring topology but making more perfected. Can be seen from the difference image.
4. Star TopologyStar topology or more often called star topology. In this topology we have to use another tool to help connect computer networks. Examples of tools in use here is a hub, switch, etc..
The advantage of this topology is very much all of them allows admin to manage the network, allowing the addition of a computer or terminal, ease of detecting defects and errors in the network. But with its many advantages in terms of topology is not without shortcomings. The drawback to such extravagance cables, centralized control on the hub sometimes be critical problems that in case of damage to the network hub, then all will not be in use.
5. Tree TopologyTopology also called tree or hierarchical topology and can also be called a multilevel topology is a topology that can be used on the network in the multi-storey office space.
The central hub or who are at the very top is the active central central while underneath is a passive central.I got here a little pemaran in this article and I will continue in the next article with great jariangan to build, and how penanggulangnan problems on the network.
Definition of Computer Networks And Benefits
By : Unknown
Definition of Computer Networks. Computer networks have the definition of a set of computers and other devices as supporting computers that are connected to each other in a single unit. Media computer network without wires and can be via cable, this allows network users to share information, such as data or documents, can print through the same printer in the same network, the user can communicate between each other (email , chat), to accessing information (web browsing).
In a computer network there are two parties interacting with each other to achieve the common goal of the client and server pihat. Client side is the party receiving or requesting service, while the server is the party who send or deliver the service. In addition there is a computer in a network of tens, thousands, and even millions of nodes. Node is any computer or other device connected to a network.
In a computer network there are two parties interacting with each other to achieve the common goal of the client and server pihat. Client side is the party receiving or requesting service, while the server is the party who send or deliver the service. In addition there is a computer in a network of tens, thousands, and even millions of nodes. Node is any computer or other device connected to a network.
Based on the function, the computer network has two types, namely client-server and peer-to-peer. Client Server is a computer that has a network of computers used as servers. Peer-to-peer network that allows each host computer can be a server and client together.
1. As sharing resources
Which aims to ensure that all equipment, programs, and other peripherals can be used by any user on the computer network.
2. As the development and maintenance of equipment
With the development of computer network equipment will be much easier and can save costs at the same time, for every purchase of components such as printer then simply buy one fruit alone, so that the printer can be used together. Besides computer network also allows users (user) in treating hard drive and other devices, such as providing protection from virus attacks, hard enough to focus on the central computer only.
3. As an effective communication medium
Computer networks can make the communication among users to one another, both for sending information or messages that are important and for teleconferences.
4. As data security
Through a computer network system, stored data will be more secure because it is stored in a central computer that can only be accessed by users who have access rights.
5. As data integration
With the computer network, the reliance on a central computer can be reduced, because each data processing is not all done by one computer, but can be processed on another computer. Therefore computer network can establish data integration that allows users to process and obtain information at any time.
Thus the discussion of the meaning of computer networks and their benefits may add insight you all :)