单项选择题

A. It ensures that data is retransmitted if an acknowle……

Network equipment supporting the use of flow control mechanisms has been recently installed. What is the purpose of flow control in a data network?（）

A. It ensures that data is retransmitted if an acknowledgment is not received.
B. It reassembles segments in the correct order on the destination device.
C. It provides a mechanism for the receiver to control the transmission speed.
D. It regulates the size of each datagram segment.
E. All of the above are functions of flow control

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单项选择题The command ip route 192.168.24.64 255.255.255.192 192.168.8.2 100 was configured on a router named TK1. No routing protocols or other static routes are configured on the Corporate router yet.Based on this information, which statement is true about this command?（）

A. This command sets a gateway of last resort for the TK1 router.
B. The number 100 indicates the number of hops to the destination network.
C. The interface with IP address 192.168.8.2 is on the TK1 router.
D. The command creates a static route for all IP traffic with the source address 192.168.24.64.
E. Packets destined for host 192.168.24.124 will be sent to 192.168.8.2.
F. None of the above

单项选择题A PC on a network segment sends data to another PC on a different segment.Which of the following correctly describe the correct order of how this data will be encapsulated?（）

A. Data, Frame, Packet, Segment, Bit
B. Data, Frame, Segment, Packet, Bit
C. Data, Packet, Frame, Segment, Bit
D. Data, Packet, Segment, Frame, Bit
E. Data, Segment, Frame, Packet, Bit
F. Data, Segment, Packet, Frame, Bit

单项选择题What term is used to describe the process where one frame is placed into a different type of frame?（）

A. Framing
B. De-encapsulation
C. Encapsulation
D. De-framing
E. None of the above

多项选择题Regarding PAR (Positive Acknowledgement and Re-transmission), which of the answer choices below are correct?（）

A. The source device will only retransmit lost packets on the request of the destination device.
B. The source device starts a timer when it sends a segment and retransmits if an acknowledgment is not received before the timer expires.
C. The destination device acknowledges receipt of a segment by sending a packet with a new sequence number and the ACK bit sent.
D. The destination device acknowledges receipt of a segment by sending a packet that indicates the next sequence number it expects.
E. If the destination device does not receive a segment, all segments are retransmitted.
F. The source device keeps a record of all segments sent and expects and acknowledgment of each.

单项选择题Error detection schemes check errors in the data packets by reading which field frame IDs?（）

A.MTU
B.PDU
C.FCS
D.Flag
E.MAC
F.BRI