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Which of the following protocols is a transport layer protocol that uses a three-way handshake to establish a connection before transmitting any data?
TCP
DHCP
SSH
SNMP
Transmission Control Protocol (TCP) is known for its handshaking process, commonly referred to as the 'three-way handshake'. This process establishes a reliable session between two devices. This protocol ensures that data is transmitted in sequence and without errors, by establishing this connection prior to any data transmission. On the other hand, protocols like SNMP and DHCP are application-layer protocols that do not themselves establish a connection and may use UDP for transmission, which does not provide the same reliability guarantees as a connection-oriented protocol. SSH, while it does use TCP to establish a secure connection, is not primarily defined by the handshaking process. It's notable here because, in this question, TCP is the so-called 'lowest' protocol that involves connection establishment.
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