FROM: Network Devices (Hub, Repeater, Bridge, Switch, Router, Gateways and Brouter) 1. Repeater(中繼器) – A repeater operates at the physical layer. 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. An important point to be noted about repeaters is that they do not amplify the signal. When the signal becomes weak, they copy the signal bit by bit and regenerate it at the original strength. It is a 2 port device. Summary: 是一個在網路傳輸訊號時，當訊號變弱後 這個設備就重新產生後疊加，達到訊號可以延伸傳輸距離的目的。(位 於 physical layer ) 2. Hub – A hub is basically a multiport repeater. A hub connects multiple wires coming from different branches, for example, the connector in star topology which connects different stations. Hubs cannot filter data, so data packets are sent to all connected devices. In other words, collision domain of all hosts connected through Hub remains one. Al
