Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) — Question 114

What is indicated by an increase in IPv4 traffic carrying protocol 41?

Answer options

• A. deployment of a GRE network on top of an existing Layer 3 network
• B. attempts to tunnel IPv6 traffic through an IPv4 network
• C. unauthorized peer-to-peer traffic
• D. additional PPTP traffic due to Windows clients

Correct answer: B

Explanation

The correct answer is B because protocol 41 is specifically used for encapsulating IPv6 packets within IPv4, signaling attempts to tunnel IPv6 traffic. Option A is incorrect as it relates to GRE, not protocol 41. Option C is wrong because there is no direct correlation between protocol 41 and unauthorized peer-to-peer traffic. Option D is also incorrect since PPTP does not utilize protocol 41.