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


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1.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

2.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.

4.单项选择题Which frame field do error detection schemes view to perform their function?()

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

5.单项选择题Which of one the following fields is contained within an IEEE Ethernet frame header?()

A. source and destination MAC address
B. source MAC address and destination network address only
C. source and destination network address only
D. source network address and destination MAC address
E. source and destination MAC address and source and destination network address

7.多项选择题What functions do routers perform in a network?()

A. Packet Switching
B. Access Layer Security
C. Path Selection.
D. VLAN Membership Assignment.
E. Bridging between LAN segments.
F. Micro-segmentation of Broadcast Domains.

8.单项选择题If NVRAM lacks boot system commands, where does the router look for the Cisco IOS by default?()

A.ROM
B.RAM
C.Flash
D.Bootstrap
E.Startup-.config

9.多项选择题When selecting a Network Interface Card (NIC), which of the following factors need to be considered?()

A. The type of application used on the network
B. The type of system bus used by the computers
C. The type of memory installed in each computer
D. The type of media used in the network topology
E. The type of protocols used in the network
F. The physical layout of the network hosts

10.多项选择题On a Cisco network, which of the following modes of flow control are commonly used to mitigate the effects of busy data networks?()

A. Source Quench.
B. Learning.
C. Buffering.
D. Windowing.
E. Cut-Through.

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