Cisco 640-821 Braindumps Exams -Just4Exams
Exam Name: Introduction to Cisco Networking Technologies
Q & A : 92 Q&As
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Exam : CISCO 640-821
Title : INTRO
1. 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
2. The Hub and Spoke routers are directly connected through their serial interfaces for purposes of testing. Based on the output shown in
the exhibit, what must be done to make the serial line operational?
A. Start the clock on the Hub router.
B. Change the IP address on the Spoke router.
C. Configure the serial 0/0 interface on the Spoke router with a clockrate.
D. Replace the broken cable between the two devices.
E. Use the no shutdown command on the Hub router.
3. What is the purpose of flow control?
A. to ensure data is retransmitted if an acknowledgment is not received
B. to reassemble segments in the correct order at the destinati