350-401 Question #279: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. A GRE tunnel has been created between HQ and BR routers. What is the tunnel IP on the HQ router?

Options

• A10.111.111.1
• B10.111.111.2
• C209.165.202.130
• D209.165.202.134

Explanation

The tunnel IP on the HQ router is the address assigned to the logical GRE tunnel interface, establishing the virtual network segment for the tunnel.

Common mistakes.

• B. 10.111.111.2 would typically be the tunnel IP address assigned to the tunnel interface on the other end of the point-to-point GRE tunnel (e.g., the BR router).
• C. 209.165.202.130 is likely the public IP address of the physical interface on one of the routers, which serves as the tunnel source or destination, not the logical tunnel interface IP itself.
• D. 209.165.202.134 is likely another public IP address for a physical interface, either on the same router or the other end, but not the GRE tunnel interface IP address.

Concept tested. GRE tunnel interface IP addressing

Reference. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/15-mt/ir-15-mt-book/ir-tunnel-int-cfg.html

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