What does the subway rep repeater mean?
Increases the maximum number of nodes.Each segment can use different communication rates.Improved reliability. When a network fails, it usually affects individual segments only.Performance has been improved.The disadvantage is that the relay increases the delay when the received signal is restored (restored) to the state at the time of transmission.The MAC sublayer of the CAN bus does not have the flow control function. When the load on the network is very heavy, it is possible to overflow due to insufficient storage space in the buffer in the repeater, resulting in frame loss.If a repeater fails, it will have an impact on the work of the two adjacent subnets.
The function repeater (Repeater) works at the physical layer of OSI, the center of all nodes on the LAN. Its function is to amplify the signal, compensate the signal attenuation, and support long distance communication.The advantage extends the communication distance, but the cost is to increase some storage and forwarding delay.
As a result of loss, the signal power transmitted on the line will be gradually attenuated, attenuation to a certain extent will cause signal distortion, and this will lead to a reception error. Repeaters are designed to solve this problem. It completes the connection of the physical circuit, amplifies the attenuated signal and remains the same as the original data. In general, both ends of the repeater are connected to the same media, but some repeaters can also do the switching of different media. In theory, the use of repeaters is unlimited, and the network can therefore be indefinitely extended. In fact, this is impossible, because the network standards are specific to the delay range of the signal, the repeater can only work effectively within this set of regulations, otherwise it will cause network failure.
Repeater (RP) is a device that connects network lines and is often used for two-way forwarding of physical signals between two network nodes. The repeater is the most simple network interconnection equipment, mainly to complete the physical layer, is responsible for the physical layer of two nodes according to a transmission of information, copy, adjust and complete the signal amplification function, in order to prolong the network length.
