Wireless cards enable users to access networks and the Internet wirelessly. These cards are standard and built-in on all new laptops and are also frequently used in desktops, handheld devices and phones.
5GHz versus 2.4GHz
- Less crowded than 2.4GHz; less interference
- Higher data rates
- Affected by microwaves
- Longer range than 5GHz
- Better at penetrating concrete walls and floors
How do I tell which frequency I am on?
If you are using a Macintosh laptop, hold the option key while clicking the wireless icon at the top. A few lines down, under the channel listing, it will either say 5GHz or 2.4GHz.