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

exams 200-201 V1 200-201 exam 0 Comments

What is indicated by an increase in IPv4 traffic carrying protocol 41 ?
A . additional PPTP traffic due to Windows clients
B. unauthorized peer-to-peer traffic
C. deployment of a GRE network on top of an existing Layer 3 network
D. attempts to tunnel IPv6 traffic through an IPv4 network

Answer: D