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? （）

TestKing.com has allocated the IP add 199.144.27.0 is its network, to provide flexibility for the LAN design, a subnet mask of 255.255.255.240 has been chosen. Which of the following address can be assigned to LAN on the resulting subnets.（）

Which of the following statements regarding routed and routing protocols are true?（）

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?（）

Which of the following contribute to congestion on an Ethernet network?（）

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

A technician at TestKing needs to update the network documentation. One of the tasks includes documenting the name of the IOS image file of each router in the network.Which commands could be used to find this information?（）

Which of the following correctly describe steps in the OSI data encapsulation process?（）

A Router with a BRI/T interface will be used for an ISDN Connection what other ISDN device is required to complete this connection? （）

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?（）