200-201 Network Intrusion Analysis Practice Question
During an incident, an analyst observes the following in PCAP: (1) DNS queries with random-looking subdomains to a known malicious domain, (2) large outbound FTP transfers of .zip files, (3) HTTP POST requests with Base64-encoded data in the body. Which THREE exfiltration techniques are being used? (Select 3)
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
✓
FTP exfiltration
DNS queries with encoded subdomains indicate DNS tunneling. FTP transfers indicate FTP exfiltration. HTTP POST with Base64 indicates HTTP exfiltration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ICMP exfiltration
Why it's wrong here
ICMP exfiltration uses ping packets, not observed.
- ✓
FTP exfiltration
Why this is correct
Large FTP transfers.
- ✓
DNS tunneling
Why this is correct
Data in DNS queries.
- ✗
Steganography
Why it's wrong here
Steganography hides data in media, not evident here.
- ✓
HTTP exfiltration (POST)
Why this is correct
Data in HTTP POST body.
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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.