Frame-Relay features Frame relay technology has the following characteristics: Hongkong Onice Limited , https://www.ousibangvape.com
Statistical multiplexing, frame transparent transmission, and error detection are completed at the link layer, but retransmission operations after errors are not provided. The frame number, flow control, response and monitoring mechanisms are eliminated, which greatly saves the overhead of the switch, improves the network throughput, and reduces the communication delay. The access rate of general frame relay users is between 64Kbps-2Mbps, with scalable speed.
Frame relay is an international standard, and is increasingly widely used.
Switching unit-The information length of the frame is longer than the packet length, and the maximum reserved frame length must be at least 1600 bytes / frame, which is suitable for encapsulating the data unit of the local area network. Users can effectively use the reserved bandwidth, that is, the committed information rate (CIR), and also allow users' burst data to occupy unscheduled bandwidth to improve the utilization of network resources.
The Frame Relay protocol simplifies the third layer function of X.25, greatly simplifies the processing of network nodes, and improves the efficiency of network processing of information. The transmission link used by Frame Relay to transmit data is a logical connection rather than a physical connection. Multiple logical connections can be multiplexed on one physical connection, which can realize bandwidth multiplexing and dynamic allocation, reducing the cost of network connection.
Due to the non-broadcast nature of the Frame Relay protocol, the transmission of broadcast packets must rely on the replication of the router, which will reduce the effective bandwidth utilization and reduce the performance of the network equipment.
Provide a set of bandwidth management and congestion prevention mechanisms, but this mechanism requires the cooperation of end device protocols, including routers, WAN switches, etc., otherwise there is no good congestion management.
The interoperability of equipment from different manufacturers may cause a large delay in the frame relay network.