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200-201 Practice Question: Which TWO of the following are indicators of a…
Which TWO of the following are indicators of a network scan?
⚠ Common exam trap
Cisco often tests the distinction between a network scan (reconnaissance from a single source) and a denial-of-service attack (flood from multiple sources), so candidates may confuse option E (SYN flood) with a scan.
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
✓
ICMP echo requests to multiple hosts
ICMP echo requests (ping sweeps) sent to multiple hosts are a classic reconnaissance technique used to identify live hosts on a network. This type of scan maps the network topology before launching further attacks, and it is a clear indicator of network scanning activity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Single connection to a well-known port
Why it's wrong here
Incorrect. A single connection is normal traffic.
- ✓
ICMP echo requests to multiple hosts
Why this is correct
Correct. This is a ping sweep to identify live hosts.
- ✗
DNS queries for many domains
Why it's wrong here
Incorrect. This may be reconnaissance but not a network scan per se.
- ✓
Multiple connection attempts from same source to different ports on same destination
Why this is correct
Correct. This is typical of a port scan.
- ✗
Large number of SYN packets to a single port from multiple sources
Why it's wrong here
Incorrect. This is characteristic of a SYN flood attack, not a scan.
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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.