The catch is, by default, anyone in “earshot” can tap into your LAN as if there were one of your computers. Make sure you configure encryption, user ids and passwords to make each station log into your LAN. You must give your wireless network an name. Other wireless LAN users in your building will also see this, so keep it clean and informative e.g. “Apt 1a, 2030 Main Street”. Usually you let the configuration program pick a random encryption key. You can use my password generator to compute and unguessable one for you. Write it down in case you later have to refresh the memory of your devices.

Wireless LANs are usually slightly slower than using cable, and they are more susceptible to electical interference.

The advantage is ease of installation and lack of clutter from the cables.

A wireless LAN is not totally wireless. It will have at least a cable to the Internet modem.