Chapter 11
| 1: | What does GRE stand for? |
| A1: | Answer: Generic Routing Encapsulation |
| 2: | Is it possible to use a private IP address as the “tunnel destination” IP address when using GRE to carry traffic over the public Internet? |
| A2: | Answer: No. The tunnel destination address is used to populate the destination IP address field in GRE's delivery header. This IP address needs to be routable. |
| 3: | How many pairs of routers can one GRE tunnel connect? |
| A3: | Answer: One |
| 4: | What is the most common reason for using loopback interfaces as the source of a GRE tunnel? |
| A4: | Answer: Loopbacks don't go down like normal interfaces. |
| 5: | How do you identify a GRE packet on a sniffer trace? |
| A5: | Answer: By looking for IP protocol 47, which is the protocol number used for GRE. |
| 6: |
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