CERTIFIED-IN-CYBERSECURITY Question #76: Real Exam Question with Answer & Explanation

The correct answer is C: SYN SYN/ACK ACK. TCP uses a three-way handshake to establish a reliable connection by exchanging three packets with the SYN, SYN/ACK and ACK flags. Although SYN, ACK and FIN are valid TCP packet flags, the sequence SYN ACK FIN is not the TCP handshake. Both the sequences Discover Offer Request an

Network Security

Question

Which are the three packets used on the TCP connection handshake? ()

Options

ADiscover Offer Request
BSYN ACK FIN
CSYN SYN/ACK ACK
DOffer Request ACK

Explanation

TCP uses a three-way handshake to establish a reliable connection by exchanging three packets with the SYN, SYN/ACK and ACK flags. Although SYN, ACK and FIN are valid TCP packet flags, the sequence SYN ACK FIN is not the TCP handshake. Both the sequences Discover Offer Request and Offer Request ACK are used in DHCP (but are still incomplete, since DHCP is a four-way handshake).

Topics

#TCP#Three-way Handshake#Networking Protocols#Packet Flags

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