CCNA真题(2)基本 IOS 配置2

21: Which of the following commands would you type to see this output shown in the figure above?
B. Show ip interface detail
D. Show ip interface brief
22: Your routers at ACME, Inc., are having some connectivity issues. You issue show commands for each connecting router's interface. Why are they unable to communicate (see figures above)?
B. Wrong routing protocol
D. Encapsulation mismatch
23: You need to back up the configurations you just made, but no TFTP servers are available. Which of the following commands are options to back up your currently running configuration? (Choose two.)
B. Router1#copy running-config flash
D. Router1#copy running-config http
24: You are consulting a small business that is establishing its first WAN link. The client wants to know what encapsulation you will be using on the link. Which of the following are valid encapsulations for WAN links? (Choose three.)
B. Ethernet
D. PPP

A. Router1#service password-encryption
C. Router1#enable secret password