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Exam 300-101 topic 1 question 99 discussion

Actual exam question from Cisco's 300-101
Question #: 99
Topic #: 1
[All 300-101 Questions]

Refer to the exhibit. After configuring GRE between two routers running EIGRP that are connected to each other via a WAN link, a network engineer notices that the two routers cannot establish the GRE tunnel to begin the exchange of routing updates. What is the reason for this?

  • A. Either a firewall between the two routers or an ACL on the router is blocking IP protocol number 47.
  • B. Either a firewall between the two routers or an ACL on the router is blocking UDP 57.
  • C. Either a firewall between the two routers or an ACL on the router is blocking TCP 47.
  • D. Either a firewall between the two routers or an ACL on the router is blocking IP protocol number 57. A
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Suggested Answer: Explanation 🗳️
by GuramM at Sept. 22, 2019, 12:21 p.m.

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GuramM
Highly Voted 5 years, 8 months ago
Correct Answer A
upvoted 5 times
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