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Two routers are connected via their serial ports in a lab environment. The routers are configured with valid IP addresses, but they cannot ping each other. The show interface serial0/0 command shows that the serial0/0 interface is up but the line protocol is down. What could be the cause of this problem?
The no shutdown command has not been applied to the interfaces.
*The clock rate command has not been entered on the DCE interface.
The interface timers are not cleared.
The FastEthernet interface is emulating a serial interface by assigning it a timing signal.
Refer to the exhibit. When computer A sends a frame to computer D, what computers receive the frame?
*only computer D only computer A and computer D only computer B, computer C, and computer D all computers
When connectionless protocols are implemented at the lower layers of the OSI model, what is usually used to acknowledge that the data was received and to request the retransmission of missing data?
IP UDP
Ethernet
a connectionless acknowledgement
*an upperlayer, connectionoriented protocol or service
Refer to the exhibit. Host A is unable to reach host B on the remote network. A technician attempted to ping the local gateway and the ping was successful. To verify the host configuration, the technician issued the ipconfig command. What is the likely cause of the problem?
The local NIC is incorrectly configured.
The subnet mask on host A is incorrectly configured. The IP address on host A is incorrectly configured.
*The default gateway on host A is incorrectly configured.
Refer to the exhibit. Host C is able to ping 127.0.0.1 successfully, but is unable to communicate with hosts A and B in the organization. What is the likely cause of the problem?
Hosts A and B are not on the same subnet as host C.
The IP addresses