A router connects devices within a network by forwarding data packets between them

Routers let multiple computers share a common Internet connection from your ISP (Internet Service Provider).When you order service from an ISP,they provide a box called wireless router,which has capabilities to make muliple wifi connections.

Technical Definition of Router

Technically,a router connects devices within a network by forwarding data packets between them. These data can be sent from the internet to devices and from devices to the internet. The router does this by assigning a local IP address to each of the devices on the network. This ensures that the data packets end up in the right place, rather than getting lost within the network. Normally routers are with one antenna. If two identical antennae router is used, It does not increase the speed (Mbps )of Wi-Fi but covers more area. Say if you have a router on the ground floor with two antennae, one kept horizontal will cover the ground floor and another vertical antenna can cover the 1st floor. To capture 802.11b,g and n radiowaves, Modern Routers have antennae ( Plural of the antenna is antennae) so that there is dual frequency access, 2.4GHz, and 5GHz radio waves. The two antennae in the router help improve the propagation of the signal.

Receiving capabilities of router for Wi-Fi

The router may support the faster 5GHz network but the device might not have the right wireless network adapter. When purchasing a device say computer, one should ensure the capabilities of its Wi-Fi card. The 2.4Ghz network is, at this moment, the standard used for most consumer devices to communicate, With this configuration one may have frequency congestion, which leads to lower speeds and a less stable connection.
The 5Ghz frequency band was introduced as a solution to this. Nowadays modern routers are with the 5GHz protocol. The device should have a 5Ghz card to communicate with the router.

If the wireless network specifications in a device are “BGN” or “802.11b/g/n”, then it supports 2.4GHz.only.If only “N” then it may support either 2.4GHz or 5GHZ. You need to check it. For checking whether your device supports only 2.4GHz or both 2.4GHz and 5GHZ, find out” Supported PHY Modes” in Mac and “Radio types Support ” in windows. It should read something like this

Mac           Supported PHY modes      802.11a/b/g/n/ac
Windows    Radio Types Support        802.11b,802.11g,802.11n

When a router connects the internet to various devices at home, the router creates a hotspot and create Wireless Local Area Network (WLAN).

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