(1) See transparent LAN service.
(2) (Transport Layer Security) A security protocol from the IETF that is based on and supersedes Secure Sockets Layer 3.0 (SSL 3.0). Very similar to SSL, TLS uses digital certificates to authenticate the user as well as authenticate the network (in a wireless network, the user could be logging into a rogue access point). TLS adopted a more secure message authentication code (see HMAC) and added new alert messages. The TLS client uses the public key from the server to encrypt a random number and send it back to the server. The random number, combined with additional random numbers previously sent to each other, is used to generate a secret session key to encrypt the subsequent message exchange. For more details, see SSL. See EAP and TLS.