单项选择题
Which Cisco IOS diagnostics command can disrupt the operation of a router under high-load conditions?（）
A. show running-config B. show processes cpu C. debug all D. logging host ip address
单项选择题 Which command encrypts all plaintext passwords?（）
单项选择题 Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?（）
单项选择题 What is the default administrative distance of OSPF?（）
