The correct answer is: C. An Nmap scan
Explanation:
The packet capture shows a TCP three-way handshake sequence between 10.203.10.17 and 10.203.10.23 on port 22 (SSH):
1. SYN from source to destination.
2. SYN-ACK in response.
3. ACK from source to complete the handshake.
4. Then a RST (Reset) is sent, terminating the connection.
This behavior is typical of a port scan, particularly from Nmap, when used with options like -sS (TCP SYN scan) or more specifically -sT (TCP connect scan), which completes the handshake and then resets the connection without sending further data. Nmap does this to check for open ports without actually establishing a prolonged connection.
This looks like a TCP connect Scan from Nmap.
Refference:
https://nmap.org/book/scan-methods-connect-scan.html
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Justheretolook
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