Five minutes after issuing the show running-config command, a technician enters the command again and notices that several access list statements have been altered. Because of this, the technician believes that the router is being configured by an unknown person through Telnet. Before changing the router passwords, the technician would like to discover if anyone is connected to the router by Telnet and stop them from making further changes.Which commands will accomplish these options?（）

Which Frame Relay feature is responsible for transmitting keepalives to ensure that the PVC does not shut down because of inactivity?（）

What should the configuration register value be after successfully completing the password recover procedure and returning the router to normal operation? （）

A Class C network address has been subnetted with a /27 mask.Which of the following addresses is a broadcast address for one of the resulting subnets?（）

What is the purpose of pressing the Ctrl+Break keys during the router password recover procedure?（）

The following access list was applied outbound on he E0 interface connected to the 192.168.1.8/29 LAN:access-list 123 deny tcp 192.168.1.8 0.0.0.7 eq 20 anyaccess-list 123 deny tcp 192.168.1.9 0.0.0.7 eq 21 anyWhat effect will this access list have?（）

Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational? （）

Which connections allow the use of full-duplex Ethernet?（）

Which command is used to display the placement and direction of an IP access control list on a router?（）

Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to network hosts?（）