Transmission Control Protocol (TCP) is a communication standard, one of the first internet protocols (TCP/IP). It is connection-oriented, for all kind of devices and applications to exchange messages through a particular network.
Data is organized in a specific way by TCP to be transmitted between client and server. The purpose is to protect the data on their trip around the network from the sending to the delivery.
TCP is a very popular protocol in network communications.
There are a lot of DNS record types, at least 50 out there! One of them is called DNS TXT record, and it has a variety of purposes. Yes, it is one simple text record, but it is widely used, so let us explain the TXT record.
TXT record is a DNS record type that has text information designed for external to the domain sources. The text could be written for people, so it would be easy to read, has enough information and logically organized, or made for computers, and has a more technical format.
Usually, you will see, inside the TXT record, a piece of general information about the domain and an additional part for a particular type of validation.