Online Access Free 640-821 Practice Test

A network administrator cannot get a router serial interface to become active. The administrator suspects that the problem may be the cable attached to the interface. The administrator is not at the same physical location as the router. Which Cisco IOS command allows the administrator to check the serial 0/0 cabling type?

• A.show controllers serial 0/0
• B.show startup-config
• C.show running-config
• D.show version
• E.show interfaces serial 0/0

A network administrator needs to create 29 subnetworks while maximizing the number of host addresses available on each subnet. How many bits must be borrowed from the host field of the network address to provide the required number of subnets with the most hosts per subnet?

• A.4
• B.3
• C.7
• D.2
• E.5
• F.6

DRAG DROP
drag drop

Correct Answer:

What is the purpose of flow control?

• A.to provide a means for the receiver to govern the amount of data sent by the sender
• B.to regulate the size of each segment
• C.to reassemble segments in the correct order at the destination device
• D.to ensure data is retransmitted if an acknowledgment is not received

Refer to the graphic. A network associate is planning to copy a new IOS image into the
Paden router. This new image requires 8 MB of flash memory and 32 MB of RAM. How will the IOS proceed with the copy process?

• A.IOS will issue an error message because flash memory is not large enough to hold the new image.
• B.The new IOS will be copied into flash memory and the current image will remain.
• C.During the copy process, the current IOS image will be erased.
• D.The current IOS image must be manually erased before IOS will allow the new image to be copied.