TCP
Transmission Control Protocol
A reliable, connection-oriented transport protocol.
Transmission Control Protocol is a connection oriented transport that provides reliable, ordered, error checked delivery using sequence numbers, acknowledgments, and a three way handshake of SYN, SYN-ACK, and ACK. That handshake is abused in SYN flood denial of service attacks that exhaust half open connection resources, and predictable sequence numbers historically enabled session hijacking. It contrasts with UDP, which is connectionless and faster but unreliable. On the exam, tie the TCP handshake to SYN flood defenses such as SYN cookies.
Looking TCP up is step one. Getting tested on it is step two.
A free account opens all 4 Domain 1 objectives, 271 exam-style questions with a lesson and a lab on each, a placement check that skips what you already know, and a dated plan. No card.
Not affiliated with or endorsed by CompTIA.