Wireless router

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A wireless router or Wi-Fi router is a device that performs the functions of a router and also includes the functions of a wireless access point. It is used lớn provide access lớn the Internet or a private computer network. Depending on the manufacturer and model, it can function in a wired local area network, in a wireless-only LAN, or in a mixed wired and wireless network.

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Features[edit]

Wireless routers typically feature one or more network interface controllers supporting Fast Ethernet or Gigabit Ethernet ports integrated into the main system on a chip (SoC) around which the router is built. An Ethernet switch as described in IEEE 802.1Q may interconnect multiple ports. Some routers implement liên kết aggregation through which two or more ports may be used together improving throughput and redundancy.^[1]

All wireless routers feature one or more wireless network interface controllers. These are also integrated into the main SoC or may be separate chips on the printed circuit board. It also can be a distinct thẻ connected over a MiniPCI or MiniPCIe interface. Some dual-band wireless routers operate the 2.4 GHz and 5 GHz bands simultaneously. Wireless controllers tư vấn a part of the IEEE 802.11-standard family and many dual-band wireless routers have data transfer rates exceeding 300 Mbit/s (For 2.4 GHz band) and 450 Mbit/s (For 5 GHz band). Some wireless routers provide multiple streams allowing multiples of data transfer rates (e.g. a three-stream wireless router allows transfers of up lớn 1.3 Gbit/s on the 5 GHz bands).

Some wireless routers have one or two USB ports. These can be used lớn connect printer or desktop or mobile external hard disk drive lớn be used as a shared resource on the network.^[2] A USB port may also be used for connecting mobile broadband modem,^[3] aside from connecting the wireless router lớn an Ethernet with xDSL or cable modem. A mobile broadband USB adapter can be connected lớn the router lớn share the mobile broadband Internet connection through the wireless network. Some wireless routers come with either xDSL modem, DOCSIS modem, LTE modem, or fiber optic modem integrated.

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The Wi-Fi clone button simplifies Wi-Fi configuration and builds a seamless unified trang chính network, enabling Super Range Extension, which means it can automatically copy the SSID and Password of your router.^[4]

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Operating system[edit]

The WRT54G wireless router supporting only 802.11b and 802.11g. Its OEM firmware gave birth lớn OpenWrt

The most common operating system on such embedded devices is Linux. Less frequently, VxWorks is used. The devices are configured over a trang web user interface served by a light trang web server software running on the device. It is possible for a computer running a desktop operating system with appropriate software lớn act as a wireless router. This is commonly referred lớn as a SoftAP.

In 2003, Linksys was forced lớn open-source the firmware of its WRT54G router series (the best-selling routers of all time) after people on the Linux kernel mailing list discovered that it used GPL Linux code.^[5] In 2008, Cisco was sued in Free Software Foundation, Inc. v. Cisco Systems, Inc due lớn similar issues with Linksys routers. Since then, various open-source projects have built on this foundation, including OpenWrt, DD-WRT, and Tomato.

In năm nhâm thìn, various manufacturers changed their firmware lớn block custom installations after an FCC ruling.^[6] However, some companies plan lớn continue lớn officially tư vấn open-source firmware, including Linksys^[7] and Hãng Asus.^[6]