The WEP key can be used to connect to a wireless network if the user is unable to connect to the Linksys Wi-Fi router because of an incorrect password. The WEP key can be found in the wireless security settings of the Linksys Wi-Fi router. The configuration of the router can be accessed by logging in to the configurations page through the administrator account. The actual numbers marked as "Key 1" or "Key2", whichever is relevant, have to be used instead of the password or passphrase. With the WEP key, the user should able to connect to the Linksys Wi-Fi router.