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?（）

What feature of a networks switch allows an administrative to create separate broadcast domains?（）

The network 172.12.0.0 needs to be divided into subnets where each subnet has the capacity of 458 IP addresses.What would be the correct subnet mask to accomplish this division keeping the number of subnets at the maximum? （）

Identify three valid host addresses in the 192.168.27.0 network with a subnet mask of 255.255.255.240. （）

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

Which characteristics are representative of a link-state routing protocol?（）

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

Which of the following options lists the steps in PPP session establishment in the correct order?（）

You are configuring a new Catalyst switch that you want to manage remotely from workstations on other network segments within your enterprise.Which of the following are required to allow remote management of the switch over IP?（）

New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport.Which switching mode should be configured on the new switches to provide error-free transport to the network? （）