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What Is The Difference Between An Industrial Router And An Industrial Ethernet Switch?

Shenzhen Libtor Technology Co.,Ltd | Updated: Aug 01, 2017

  What is the difference between an industrial router and an industrial Ethernet switch?

  The switch works on the second layer and the router works on the third floor. But with the development of technology, some switches integrate some of the third layer of the routing function, known as the third layer of the switch, the following analysis of the standard switch and industrial router differences:

  In the simplest words, the switch to find a computer by looking for mac address, that is, through your network card inherent in a unique identification number to find the

  · Router to find a computer is through the ip address, is the first number of your computer, send you an ip, and then through the ip to identify you that is, in the second layer of the switch is not designed to work Protocol and network address (ip) assignment

  In fact, the word exchange first appeared in the telephone system, specifically to achieve the exchange of voice signals between two different telephones, the completion of the work of the equipment is the telephone exchange. So from the original terms, the exchange is only a technical concept, that is, the completion of the signal from the equipment to the export of the import port. Thus, as long as all devices that conform to that definition can be referred to as switching devices. Thus, "exchange" is a broad term that, when it is used to describe the second layer of data network equipment, actually refers to a bridge device; and when it is used to describe the third layer of the data network Device, also refers to a routing device. industrial router We often talked about the Ethernet switch is actually a bridge-based multi-port second-tier network equipment, which for the data frame from one port to another port forwarding provides a low latency, low overhead path.

  And the industrial router is the packet switching device (or network layer relay device) in the network layer of the OSI protocol model. The basic function of the router is to transfer the data (IP packets) to the correct network, including:

  1.IP data reported gongy, including the routing and routing of routing and transmission;

  2. Subnet isolation, suppression of broadcast storms;

  3. Maintain the routing table and exchange routing information with other routers. This is the basis for IP packet forwarding.

  4. IP data reported error handling and simple congestion control;

  5. To achieve the IP datagram filtering and accounting.

  The main differences between routers and switches are reflected in the following areas:

  (1) the work level is different

  The initial switch is the data link layer of the OSI / RM open architecture, which is the second layer, and the router is designed to work at the network layer of the OSI model. Because the switch works on the second layer (data link layer) of the OSI, it works relatively well, and the router works on the third layer (network layer) of the OSI, and can get more protocol information. The router can make More intelligent forwarding decisions.

  (2) Data forwarding is based on different objects

  The switch uses the physical address or MAC address to determine the destination address of the forwarding data. And the router is the use of different network ID number (ie IP address) to determine the data forwarding address. IP address is implemented in the software, describes the network where the device is located, and sometimes the third layer of the address is also called the protocol address or network address. MAC address is usually hardware comes by the network card manufacturers to allocate, and has been cured to the card to go, in general, can not be changed. The IP address is usually automatically assigned by the network administrator or the system.

  (3) the traditional switch can only split the conflict domain, can not split the broadcast domain; and the router can split the broadcast domain

  The network segments connected by the switch still belong to the same broadcast domain. Broadcast packets are propagated on all network segments connected to the switch, which in some cases can lead to traffic congestion and security vulnerabilities. The network segments connected to the router are assigned to different broadcast domains, industrial router and the broadcast data does not pass through the router. Although the third layer of the switch has a VLAN function, you can also split the broadcast domain, but between the sub-broadcast domain is not communication between the exchange between them still need a router.

  (4) the router provides a firewall service

  The router only forwards packets of specific addresses, does not transmit packets that do not support routing protocols, and transmit packets of unknown target networks, thus preventing broadcast storms.

  Switch is generally used for LAN-WAN connection, the switch belongs to the bridge, is the data link layer equipment, some switches can also achieve the third layer of the exchange. The router is used for WAN-WAN connections, which can solve the forwarding of packets between heterosexual networks and act on the network layer. industrial router They only accept input packets from one line and then forward to another line. These two lines may belong to different networks and use different protocols. In contrast, the router's function is more powerful than the switch, but the speed is relatively slow, expensive, the third layer switches both wire-speed forwarding packet capacity, but also a good control of the router function, it can be widely used.

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