問題文
A firewall sits between two segments. An engineer runs a hop-by-hop path trace across it and the device never shows up as a step in the output. Which reading of the deployment does that result support?
選択肢
- The device is routing between two address ranges, since a routing step does not reduce the packet lifetime field unless it also rewrites the addresses in the header
- The device is routing between two address ranges, since a routing step does reduce the packet lifetime field but never reports the lifetime as spent from its own address
- The device is bridging one address range across its two interfaces, since a bridging step does reduce the packet lifetime field and is never allowed to report the lifetime as spent
- The device is bridging one address range across its interfaces, since a bridging step does not reduce the packet lifetime field and is never the step which reports the lifetime as spent