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

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? （）

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

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

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 is a global command?（）

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?（）

A network host is configured as follows: Host IP address: 192.168.16.183 Subnet mask: 255.255.255.224 Default gateway: 192.168.16.190 Which of the following statements describe the network to which this host is attached?（）

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