Shulou(Shulou.com)06/01 Report--

This article mainly explains "what is the function of routers and switches". The content of the explanation is simple and clear, and it is easy to learn and understand. let's follow the editor's train of thought to study and learn "what is the role of routers and switches"?

The role of routers

Putting aside the gaudy functions, back to the original mind, routers are devices launched to connect heterogeneous networks.

So the question is-what is a heterogeneous network?

Now the network is dominated by Ethernet, and most of the lines you can see are network cables or optical fibers; but at the beginning, the network was divided, including Ethernet protocol, X.25 protocol, frame relay protocol, ATM protocol and other protocols. The corresponding interfaces are telephone interface, low-speed serial port, high-speed serial port, E1 interface, Ethernet port and so on. The device that connects these networks with different protocols, different interfaces and different structures is the router.

For example, a router is like an interpreter of the online world.

The translator listens to the Chinese of Chinese customers, converts it into English, informs British customers, and helps Chinese and British customers exchange information; and so on, there is also the conversion of languages such as China and Japan, China and Russia, Britain and Japan, Japan and Russia.

After the conversion of the language and the negotiation of the transaction, the translator can also help the customer plan the delivery route of the goods to the UK through China, or from Beijing, China, to Dubai, United Arab Emirates, and finally to London, England.

And how to choose the function of the line is the so-called routing, which is also the origin of the router name.

With the development of network technology, routers are gradually given more functions, such as: IP address management, network address translation (NAT), VPN, QoS, basic firewall functions and so on.

The original translation of border trade has grown into a generalist who integrates customs, border inspection, security, transportation and other important tasks.

The greater the ability, the greater the responsibility; the greater the responsibility, the more you live; the more you live, the more tired you are.

The role of the switch

Routers are connected to heterogeneous networks and switches are connected to homogeneous networks. For example, in a local area network, computers equipped with Ethernet cards communicate with Ethernet protocols, and the network devices that connect these computers are switches.

Since there is no protocol conversion, the role of the Ethernet switch is very clear-to connect the terminal devices that support Ethernet and provide fast communication services to build a non-blocking data exchange network.

Yes, speed is the core indicator of the switch. The reason for the high speed is also very simple-the switch is equipped with a dedicated switching chip (switching engine) to send and receive data packets. It can be said that the switch chip is the soul of the switch, which determines the performance and grade of the switch.

It can be seen that the router is rich in functions, while the switch is more focused on the communication of internal devices. The router is responsible for external connection, overall management and control, while the switch is responsible for network access and internal forwarding.

Question and answer session

See here, for the title of this article-"there are 20 employees in the new office, if you want to build a network, which router or switch?" You should be able to deal with it easily.

"buy a router, act as an exit gateway, connect the operator's broadband lines externally, and provide DHCP services internally; buy a 24-port switch, connect routers and 20 computers. If you still have a budget, you can also consider buying some security products."

Thank you for your reading. the above is the content of "what is the role of routers and switches". After the study of this article, I believe you have a deeper understanding of what the role of routers and switches is. Specific use also needs to be verified by practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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