“Cisco IOS”造句，怎么用Cisco IOS造句

After you upgrade the Cisco IOS and copy the startup-config file back to the router, the router boots up with this error message.

Which two Cisco IOS commands can be used to verify connectivity above the network layer of the OSI model?

Cisco IOS Software Release 12.2 removes this exception and ensures that non-conforming packets are only dropped if there is congestion.