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Question ID 6380

What is the purpose of flow control?

Option A

To ensure data is retransmitted if an acknowledgement is not received.

Option B

. To reassemble segments in the correct order at the destination device

Option C

. To provide a means for the receiver to govern the amount of data sent by the sender

Option D

To regulate the size of each segment.

Correct Answer c
Explanation Flow control is the management of data flow between computers or devices or between nodes in a network so that the data can be handled at an efficient pace. Too much data arriving before a device can handle it causes data overflow, meaning the data is either lost or must be retransmitted. For serial data transmission locally or in a network, the Xon/Xoff protocol can be used. For modem connections, either Xon/Xoff or CTS/RTS (Clear to Send/Ready to Send) commands can be used to control data flow. In a network, flow control can also be applied by refusing additional device connections until the flow of traffic has subsided. Reference: http://whatis.techtarget.com/definition/flow-control


Question ID 6382

Which IP addresses are valid for hosts belonging to the 10.1.160.0/20 subnet? (Choose three.)

Option A

10.1.168.0

Option B

10.1.176.1

Option C

10.1.174.255

Option D

10.1.160.255

Option E

10.1.160.0

Option F

10.1.175.255

Correct Answer acd
Explanation All IP address in IP ranges between: 10.1.160.1 and 10.1.175.254 are valid as shown below Address: 10.1.160.0 00001010.00000001.10100000.00000000 Netmask: 255.255.240.0 = 20 11111111.11111111.1111 0000.00000000 Wildcard: 0.0.15.255 00000000.00000000.0000 1111.11111111 Which implies that: Network: 10.1.160.0/20 00001010.00000001.1010 0000.00000000 HostMin: 10.1.160.1 00001010.00000001.1010 0000.00000001 HostMax: 10.1.175.254 00001010.00000001.1010 1111.11111110 Broadcast: 10.1.175.255 00001010.00000001.1010 1111.11111111

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