Analyze the differences between bridges and switches

Analyzing the differences between bridges and switches this article will introduce the differences and similarities between bridges and switches. Many people may not understand the relationship between bridges and switches. After reading this article, you will surely have a lot of GAINS, I hope this article will teach you more things. A Bridge, also known as a Bridge, is a storage and forwarding device that connects two local networks. It can be used to connect networks with identical or similar architectures, this not only expands the distance or range of the network, but also improves the performance, reliability, and security of the network. The www.2cto.com Bridge and the switch work at the data link layer. They connect two LANs and forward Frames Based on the MAC address. They can be considered as a "low-layer Router" (the router works at the network layer, based on Network addresses such as IP addresses ). A switch is a set-line device that leads the network system. Most switches operate on the data link layer (Layer 2) of the OSI reference model. If the hub is regarded as a built-in Ethernet bus, the switch can be regarded as an interconnected system consisting of multiple Bus switches. Each vswitch port corresponds to a Core Bus, which is an order of magnitude higher than a backboard bandwidth Bus. The backboard Bus is connected to a Switch Engining engine. Data Packets between different ports are transferred to the switching engine through the backplane bus, and are exchanged through the storage forwarding, pass-through forwarding, and quasi-pass-through forwarding modes. The Development and Evolution of bridges and switches in the middle of 1980s, the first LAN bridge entered the market. In the initial stage, the bridge is mainly used for LAN segmentation, transmission distance extension, and application devices. In addition, the LAN breaks through the limit of shared network bandwidth. In order to enable LAN to meet the application requirements at that time. Www.2cto.com needs to expand the LAN system. To make the network system more reliable, a LAN system is divided into several independent physical network segments. The need to connect physical network segments and expand LAN systems leads to the development of bridges. It can be said that at that time, the bridge was successfully used. With the rapid development of microelectronics ASIC, processor and storage technology, the chip technology of bridge is becoming more and more advanced, and the technology and product of bridge have been continuously developed and upgraded. The network system design requires that high-performance bridges have multiple ports. With the simultaneous development of requirements and microelectronics technology, the design and manufacturing of multi-port bridges with 8, 12, 16, and 24 ports will become possible after 1990s. It is worth noting that the difference between the bridge and the switch lies in the market, not the technology. A switch performs network segmentation in the same way as a bridge. A switch is a multi-port bridge. Specifically, bridges with high port density are called LAN switches. The real difference between a switch and a bridge lies in the difference between a switch and an old bridge. What is the difference between a vswitch and a bridge the basic functions of a LAN switch are the same as those of a bridge. It provides Frame Forwarding, frame filtering, and Tree Algorithm generation functions. However, the switch is different from the bridge: 1. When the switch is working, it actually allows the channel between many group ports to work simultaneously. Therefore, the functions of a switch are not only a bridge function, but also a collection of multiple Bridge functions. That is, the bridge generally has two ports, and the switch has a high-density port. The difference between www.2cto.com 2 and segment capacity is that the switch can support multiple ports, so you can divide the network system into more physical network segments, so that the entire network system has higher bandwidth. The bridge only supports two ports. Therefore, the physical network segments of the bridge are quite limited. 3. Differences in transmission rate: the transmission rate of a switch is faster than that of a bridge. 4. Differences in data Frame Forwarding methods before a bridge sends a data frame, it usually starts forwarding the data frame after it receives the complete data frame and executes the frame detection sequence (FCS. Vswitch supports two Frame Forwarding modes: storage and direct forwarding. Before sending data, direct forwarding does not require waiting time after receiving the complete data frame and the 32-bit Cyclic Redundancy checksum CRC calculation check. From 51cto Network