What is a wifi router? Structure and function of wifi router

Router is a network device used to broadcast wifi for users to access the Internet, from which you can connect to the network on your phone or laptop more easily. Let’s learn more about what a wifi router is and their structure and function in detail!

What is a wifi router?

A wifi router, also known as a wifi router, is a device that allows you to share your Internet connection with your tablet, TV, smartphone and other wifi devices in your home through wifi waves.

From there, they allow these devices to access the Internet for reading newspapers, watching movies, playing games and daily online work needs.

Structure of wifi router

Each line of wifi routers has a different design to attract user tastes and improve broadcasting speed. However, in general, they include the following indispensable typical characteristics:

• 1 WAN port : Responsible for creating a private network layer, granting IP ranges according to Default Gateway (usually blue or yellow for easy identification).
• 2 LAN ports : Allows users to connect from the main modem to terminal devices such as laptops, computers, and TVs to use the Internet via network cables. The network transmission speed of each LAN port is different: There are 10/100Mbps, 10/100/1000Mbps types.
• Antennas : There are 2 types (external antenna and underground antenna). However, routers with external antennas are more commonly used, the greater the number of antennas, the greater the speed of wifi broadcasting.

Working principle

Router wants to broadcast wifi, you need to connect the router to the modem via RJ45 cable (LAN wire). This modem will be connected to the service line of Internet service providers.

The network cable connects from the LAN port on the main modem through the WAN or LAN ports to connect the modem and wifi router. Most devices in the network have a separate IP , helping to route and transmit signals in the most accurate Internet environment.

The router’s data transmission time is very short, certainly will not interrupt the transmission or disconnect when using Internet services.

Router is responsible for packets (packets) between 2 or more network systems together. It is a wifi hotspot so that electronic devices such as phones, tablets, TVs can connect via wifi waves.

Main function of wifi router

The router has the function of sending network data packets between 2 or more networks, from one to many final destinations from the router.

Or to put it more simply, the router can both connect wifi to phones , tablets and connect to a wired network with computers, laptops, and TVs.

Types of Routers

Wired router (Wired router)

The router is wired through a cable to connect directly to the computer. To receive Internet data packets, one port of the router connects to the modem, and to distribute Internet data packets, there must be another port connected to the computer.

In the process of transferring data packets in the network, the wired router uses a firewall (SPI) for security purposes.

Wireless router (Wireless Router)

The wireless router uses a cable to connect directly to the modem and receive Internet data packets. Wireless routers use one or more antennas to deliver data instead of transmitting data over a cable to a computer.

Virtual router (Virtual Router)

Unlike wired and wireless routers, virtual routers act as the default router for computers sharing the same network.

They use virtual router redundancy protocol (VRRP) to work, this protocol will be activated when the main router has a failure, damaged or disabled.

Core router and Edgerouter

Core routers are known as wired or wireless routers, they just distribute internet data in the same network.

Edgerouter is also a wired or wireless router, but instead of distributing data on the same network, it distributes data between one or more different networks.

How to choose and use

To choose to buy a wifi router that suits your needs, you can refer to the following factors:

• Broadcast range: This is the most important factor, this is reflected in the number and performance of the antenna. You should buy a router with the ability to penetrate walls for thick walls.
• Single band, dual band : The number of frequencies on which the wireless network can operate. Dual band is more stable and durable than single band, but the cost is relatively high.
• The maximum connection speed of the router: The highest speed that the device can handle, about 150 – 1000 Mbps or more, this depends on the package and provider.

• Security of wifi : To increase security, users should choose WP2 , this is the line that is rated as the highest safety.
• RAM, processor : The larger the RAM, the more powerful the processor, the faster and smoother the data transfer rate.
• Standard wifi connection : The most commonly used today are the N standard and the AC standard.
• Product brands: Some reputable brands such as: Asus, Tp-Link, D-Link.

To use the router, you need a piece of LAN wire (8 cores) , you plug 1 input into the modem and 1 input to the wifi router to be able to broadcast wifi or share the port for many devices.

Hopefully through the above article you will basically gain a little more knowledge about wifi routers. At the same time, through that, we know more about the functions and uses of wifi routers in daily life.