Rabu, 07 November 2012

KKPI

Network topology is a way to connect computers to each other to form a network computer. In a computer network topology of the selected type will affect the speed of communication.

1. STAR Topology
Characteristics of Star Topology
1. Each node communicates directly with each node communicates directly with the concentrator (HUB) concentrator (HUB).
2. If each packet of data that goes into each data packet When coming into consentrator (HUB) then broadcast throughout very much connected nodes (eg using 32 port hub), performance (eg using 32 port hub), then the performance of the network will be more dropped. network will be down.
3. Very easy to develop
4. If one ethernet card is broken, or one of the wires on the terminal end, the network can still keseluruhhan keseluruhhan network can still communicate or do not occur down to communicate or not happening down on the overall network. the overall network.
5. Type of cable used is usually the type of UTP.


Advantage Star Topology Star Topology Advantages
1. Pretty easy to change and add and add computers to the network using a star topology without disrupting ongoing network aktvitas.
2. If one computer on the network is damaged then the computer is not going to make the whole network star dies.
3. We can use several types of cable we can use several types of cables in the same network with a hub that can accommodate different cable types.

Losses Losses Star Topology Star Topology
1. Having a single point of error, lies in the hub. If the central hub fails, the entire network will fail to operate.
2. Need more cable because all network cables to be pulled to one central point, so more need more cable than other network topologies.
3. The number of terminals is limited, depending on the existing ports on the hub.
4. Heavy data traffic may cause the network to work more slowly.

2. Topology BUS
BUS Topology Characteristics
1. Node - nodes are connected in series along the cable, and on both ends of the cable along the cable close to the terminator.
2. Very simple in installation
3. Very economical in cost.
4. Data packets intersect each other at a cable.
5. Not required hub, which is much needed Tconnector on each ethernet card.
6. The problem that often occurs is if one node is damaged, then the whole network can be down, so that all nodes can not communicate in the network.

BUS Topology Advantages
1. Save cables
2. Layout simple cable
3. Easily developed

Losses Topology BUS
when there is a disturbance in the center of the cable along the whole network will crash.

3. Topology RING
RING topology characteristics
1. Node-Node-node connected in series along the cable, the network shapes like circles.
2. Very simple in layout like the kind of bus topology.
3. Data packets can flow in one direction (left or right) so that collisions can be avoided.
4. Faced the same problem with the bus topology, ie: if one node is damaged then the whole node can not communicate with the network.
5. Type of cable used is usually cable or UTP Patch Cable (IBM type 6).

Ring Topology Advantages
1. Data flow in one direction so that the collision can be avoided.
2. Data streams flow faster because it can serve data from the left or right of the server.
3. Can serve the traffic flow data intensive, because data can be moved left or right.
4. Time to access data more optimally.

Losses Topology Ring
1. If there is one computer in the ring fails to function, it will affect the entire network.
2. Increase or decrease the computer will mess up the network.
3. It is difficult to reconfigure.

 4. MESH Topology
Characteristics of Mesh Topology
1. Mesh topology has redundant connections between existing equipment.
2. Arrangement at any existing equipment in the network are connected to each other.
3. if the number of devices connected very much, of course it will be very difficult to control compared to only a few devices are connected.

Benefits Mesh Topology
1. The main advantage of using mesh topology is fault tolerance.
2. Ensuring the communication channel capacity, because it has excess connections.
3. Relatively easy to do troubleshoot.

Losses Mesh Topology
1. The difficulty at the time of installation and reconfiguration when the number of computers and devices connected in increasing numbers.
2. Costs to maintain a surplus.

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