LAN TRANSMISSION DEVICES

LAN Transmission

• Equipment that connecting devices on a single network, creating and connecting multiple networks or sub network in setting up some enterprise networks.

Repeater

• operates at the physical layer.

Repeater 1

• Its job is to regenerate the signal over the same network before the signal becomes too weak or corrupted so as to extend the length to which the signal can be transmitted over the same network.

Uses of Repeaters

1. Extend cable segments.

2. Extend a wireless signal.

3. Increase number of nodes beyond segment.

4. Sense a network problem and shut down a segment.

5. Connect to components in other network devices.

6. Connect segments using different media.

7. Extend backbone cable segments in LANs, WANs, and MANs.

8. Extend long, fiber-optic cable segments.

9. Increase communication distance of T-carrier lines.

Types of Repeaters

• Analog Repeaters

• Digital Repeaters

Analog Repeaters

• They can only amplify the analog signal.

Digital Repeaters

• They can reconstruct a distorted signal.

Types of Networks

• Wired Repeaters

• Wireless Repeaters

Wired Repeaters

• they are used in _ LANs.

Wireless Repeaters

• they are used in _ LANs and cellular networks.

Domain of LANs

• Local Repeaters

• Remote Repeaters

Local Repeaters

• they connect LAN segments separated by small distance.

Remote Repeaters

• they connect LANs that are far from each other.

Advantages of Repeaters

1. Repeaters are simple to install and can easily extend the length or the coverage area of networks.

2. They are cost effective.

3. Repeaters don’t require any processing overhead. The only time they need to be investigated is in case of degradation of performance.

4. They can connect signals using different types of cables.

Disadvantages of Repeaters

1. Repeaters cannot connect dissimilar networks.

2. They cannot differentiate between actual signal and noise.

3. They cannot reduce network traffic or congestion.

4. Most networks have limitations upon the number of repeaters that can be deployed.