Check the specifications on your wireless router or access point. Look for a label stating whether it broadcasts at 2.4GHz and/or 5GHz. Log into your routers administrative interface via a web browser. Check the technical details of your wireless networks to see the frequency band.
What is difference between 2.4 GHz and 5ghz on Netgear router?
Wireless Networking.I intend to use 5 GHz band of a new router between the devices. My laptop does support 802.11ac. So I wonder how much the transfer speed would improve if I get either a router advertised as 766 Mbps at 5 GHz and 300 Mbps at 2.4 GHz or a router...

When it is finished, your wireless network adapter will disappear from the list of Network adapters. Click Action > Scan for hardware changes. Then Windows will detect the missing driver for your wireless network adapter and reinstall it automatically.
Just like other network interfaces, the wireless ones are controlled with ip from the iproute2 package. Managing a wireless connection can be accomplished using network manager which will use wpa_supplicant or iwd for wireless authentication, or using wpa_supplicant or iwd directly.

As we can see from the illustration, Ghz Router Wireless Network Configuration For Speed has many fascinating aspects to explore.
21. Wait several minutes for wireless network configuration to finish and display a confirmation message.Network 5 GHz. See your router documentation or contact your internet service provider for instructions.