Which of the following contains the SYN and ACK flags?

The correct answer is C. TCP header. SYN (synchronize) and ACK (acknowledge) are control flags found in the TCP (Transmission Control Protocol) header. They are central to the TCP three-way handshake: SYN initiates a connection, SYN-ACK acknowledges it and continues the handshake, and ACK confirms the connection…

Networking concepts

Question

Options

AUDP header
BIP header
CTCP header
DICMP header

How the community answered

(52 responses)

A
4% (2)
B
2% (1)
C
92% (48)
D
2% (1)

Explanation

SYN (synchronize) and ACK (acknowledge) are control flags found in the TCP (Transmission Control Protocol) header. They are central to the TCP three-way handshake: SYN initiates a connection, SYN-ACK acknowledges it and continues the handshake, and ACK confirms the connection is established. UDP is a connectionless protocol with no flags for session establishment. The IP header contains fields like source/destination IP, TTL, and protocol - not session control flags. ICMP uses type and code fields for messaging. Only TCP has the control bit flags field that includes SYN, ACK, FIN, RST, PSH, and URG.

Topics

#TCP header#SYN flag#ACK flag#TCP/IP

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