TLS vulnerability is also known as Return of Bleichenbacher’s Oracle Threat.

TCP means Transmission Control Protocol, is a communications standard for delivering data and messages through networks. There are four layers of the TCP/IP model: network access, internet, transport, and application. Used together, these layers are a suite of protocols. The TCP/IP model passes data through these layers in a particular order when a user sends information, and then again in reverse order when the data is received.