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H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. The label value 3 has a special meaning in the MPLS network , which means ______ .

A) As a result of the forwarding equivalence class MPLS label forwarding entry of the label 3 , showing the device is the inverse of the forwarding equivalence class of the second hop device
B) As a result of the forwarding equivalence class MPLS label forwarding entry into label 3 , indicates that the device is a reciprocal of the second hop forwarding equivalence class of device
C) As a result of the forwarding equivalence class MPLS label forwarding entry of the label 3 , showing the device is the inverse of the forwarding equivalence class of the first hop device
D) As a result of the forwarding equivalence class MPLS label forwarding entry into label 3 , showing the device is the inverse of the forwarding equivalence class of the first hop device

2. Which of the following descriptions of the traditional telephone system is correct is ______ .

A) Electric as telephone ringing tone dial tone, is a pair of end PBX to provide voltage and central office switches completed.
B) pass the real machine is FXS ordinary telephone devices can be connected to the central office switch via an ordinary telephone line FXO interface.
C) electrically telephone subscriber loop access through the PBX or central office switches, are connected to the telephone subscriber loop and the PBX a line between the pair comprising TiP and Ring , wherein Ring ground, TiP then PBX negative electrode.

3. Which statement about RED ( Random Early Detection ) is correct?

A) flat average queue length is greater than the maximum discard threshold, packets are dropped randomly
B) In discarded after a congested port
C) flat average queue length is less than the minimum discard threshold, less than the maximum discard threshold, packets are dropped randomly
D) The higher the priority of the packet , the lower the drop probability.Which means less discarded
E) flat average queue length is less than the minimum discard threshold, discarding packets not

4. respect to common data stream, a voice stream is more sensitive to delay and jitter, in order to give priority to ensure the forwarding of voice data, the following technique may be employed queue scheduling ____

5. When the link type of the ONU port is Trunk , its processing method for downstream messages is _____ .

A) Only allow tagged messages to pass
B) only allowed without Tag packets to pass through, and the packets add the default VLAN of Tag
C) Only allow the packets with the default VLAN tag to pass and remove the tag
D) for without receipt of the Tag message, add the default VLAN Tag ; for received with Tag packets forwarded directly

Solutions: