- Written by Kamala R
- Posted on September 30, 2015
- Updated on July 20, 2023
- 4595 Views
The difference between the two forms of authentication is in the level of security provided. In case of clear text authentication, the password is specified as text in the authentication TLV, making it possible for an attacker to break the authentication by sniffing and capturing IS-IS PDUs on the network.