200-201 Network Intrusion Analysis Practice Question
An analyst observes repeated TCP SYN packets to various ports on a target IP with no SYN-ACK responses. What type of scan is most likely being performed?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
SYN scan
A SYN scan sends SYN packets and observes responses; incomplete handshakes indicate scanning.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
UDP scan
Why it's wrong here
UDP scans use UDP packets, not TCP SYN.
- ✗
Ping sweep
Why it's wrong here
Ping sweep uses ICMP or ARP to check host availability, not port scanning.
- ✓
SYN scan
Why this is correct
Correct. SYN scan sends SYN packets and does not complete the handshake.
- ✗
TCP connect scan
Why it's wrong here
TCP connect scan completes the full handshake.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-201 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-201 exam.