1. Refer to the exhibit. After configuring GRE between two routers running OSPF 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?
2. An engineer is configuring a GRE tunnel interface in the default mode. The engineer has assigned an IPv4 address on the tunnel and sourced the tunnel from an Ethernet interface. Which option also is required on the tunnel interface before it is operational?
3. When the tunnel interface is configured in default mode, which statement about routers and the tunnel destination address is true?
4. A network engineer has configured GRE between two IOS routers. The state of the tunnel interface is continuously oscillating between up and down. What is the solution to this problem?
5. Which two GRE features can you configure to prevent fragmentation? (Choose two)
6. Which two statement about GRE tunnel interface are true?
7. Which of the following is a GRE Tunnel characteristic?
8. Router R1, a branch router, connects to the Internet using DSL. Some traffic flows through a GRE and IPsec tunnel, over the DSL connection, destined for an Enterprise network. Which of the following answers best describes the router’s logic that tells the router, for a given packet, to apply GRE encapsulation to the packet?
9. What is a key benefit of using a GRE tunnel to provide connectivity between branch offices and headquarters?
10. A network administrator uses GRE over IPSec to connect two branches together via VPN tunnel. Which one of the following is the reason for using GRE over IPSec?
11. Which statement is true about an IPSec/GRE tunnel?
12. What are the four main steps in configuring a GRE tunnel over IPsec on Cisco routers? (Choose four)a
13. Refer to the exhibit. A new TAC engineer came to you for advice. A GRE over IPsec tunnel was configured, but the tunnel is not coming up.What did the TAC engineer configure incorrectly?
14.

Refer to the exhibit. A new TAC engineer came to you for advice. A GRE over IPsec tunnel was configured, but the tunnel is not coming up.
What did the TAC engineer configure incorrectly?

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15. Refer to the exhibit. A new TAC engineer came to you for advice. A GRE over IPsec tunnel was configured, but the tunnel is not coming up.What did the TAC engineer configure incorrectly?