| Exam 200-301 | Question id=5330 | IP Connectivity |
A router is running a classful routing protocol. Which command will enable this router to select a default route when routing to an unknown subnet of a network for which it knows the major network?
| A. |
ip classless | |
| B. |
no ip classless | |
| C. |
auto-summary | |
| D. |
no auto-summary |
The ip classless command causes a routing protocol to change its default behavior of discarding any traffic that is bound for unknown subnets of a known classful network. If the command is enabled, the router tries to match the most number of bits possible against the route in its routing table. Alternatively, the router will use the default route rather than dropping the packet.