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Exam 200-201 topic 1 question 88 discussion

Actual exam question from Cisco's 200-201
Question #: 88
Topic #: 1
[All 200-201 Questions]

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

  • 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
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Suggested Answer: B 🗳️
Reference:
https://simple.wikipedia.org/wiki/Protocol_41

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Templar
Highly Voted 2 years, 4 months ago
B is correct. Protocol 41 is a communication protocol which embeds internet protocol version 6 (IPv6) packets inside Internet protocol version 4 (IPv4) packets.
upvoted 6 times
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cliefan
Most Recent 7 months ago
Sneaky — GRE is protocol 47
upvoted 1 times
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Eng_ahmedyoussef
1 year, 6 months ago
Selected Answer: B
B is correct Protocol 41 is a communication protocol which embeds internet protocol version 6 (IPv6) packets inside Internet protocol version 4 (IPv4) packets. It is usually used to allow a computer or router with only an IPv4 address to obtain an IPv6 address (or maybe more than one address, to serve more than one computer). Most IPv6 tunnel providers support Protocol 41, including Hurricane Electric and SixXS. 6to4, 6rd, and 6in4 are all different ways of using Protocol 41. Protocol 41 does not use TCP or UDP (although the IPv6 packets inside can carry TCP and UDP traffic). It is not to be confused with TCP or UDP port number 41. https://simple.wikipedia.org/wiki/Protocol_41
upvoted 2 times
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