Which command displays the CHAP authentication process as it occurs between two routers?（）

Which pairing reflects a correct protocol-and-metric relationship?（）

Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?（）

While troubleshooting a network problem,a technician discovers that the current copy of the Cisco IOS is outdated and needs to be updated.Which of the following commands would the technician issue to replace the Cisco router IOS with the newer version?（）

At which layer of the OSI model dose PPP perform?（）

The network administrator cannot to switch 1 over a telnet session,although the hosts attached to switch 1 can ping the interface Fa0/0 of the router.Given the information in the graphic and assuming that the router and switch2 are configured properly,which of the following commands should be issued on switch 1 to correct this problem?（）

Which IPsec security protocol should be used when confidentiality is required?（）

A network administrator is trying to add a new router into an established OSPF network.The networks attached to the new router do not appear in the routing tables of the other OSPF routers.Given the information in the partial configuration shown below,what configuration error is causing this problem?（）Router(config)#router ospf 1Router(config-router)#network 10.0.0.0 255.0.0.0 area 0

When you are troubleshooting an ACL issue on a router,which command can help you to verify which interfaces are affected by the ACL?（）

What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?（）