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Exam Name: Huawei Certified Datacom Professional - Fast Certification - ENU
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Last Update: 2014-09-09
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NO.1 How many port states are defined by STP?
A. 3
B. 4
C. 5
D. 6
Answer: C
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NO.2 Which of the following statements about the Smart Link group is false?
A. A Smart Link group has two interfaces at most. The two interfaces if configured are an active
interface and a standby interface.
B. Among the two interfaces in a Smart Link group, one is in the active state and the other one in
the standby state in normal situations.
C. When the active interface goes down, the Smart Link group automatically blocks it and changes
the status of the standby interface to active.
D. When the active interface recovers from a fault, traffic will be switched back to it immediately.
Answer: D
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NO.3 Which of the following statements about the firewall technology are true? (Select 3 Answers)
A. The network gateway of the application layer checks application-layer data carried in packets
passing through the gateway.
B. The network gateway for session status detection checks session information carried in packets
only at the session layer.
C. During packet filtering, the session status is checked and the whole data stream is analyzed.
D. Address proxy replaces IP addresses and port numbers of hosts within the network with the IP
address and port number of the proxy device or router.
Answer: A,B,D
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NO.4 Which statements about VLAN mapping are true?(Select 2 Answers)
A. When sending a frame from the local VLAN, the switch replaces the VLAN tag in the frame with
another VLAN tag.
B. When receiving a frame from another VLAN, the switch replaces the VLAN tag of the frame with
the local VLAN tag.
C. When an interface receives a frame from another VLAN, it does not replace the VLAN tag of the
frame. The interface replaces the VLAN tag of the frame with another VLAN tag only when it sends a
frame.
D. The interface replaces the VLAN tag of only the frame received from another VLAN, but does not
change the VLAN tag of the frame it sends out.
Answer: A,B
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NO.5 Which of the following packet drop policies can be applied to the congestion avoidance
mechanism? (Select 3 Answers)
A. Tail-drop
B. RED
C. WRED
D. WFQ
Answer: A,B,C
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NO.6 How many multicast IP addresses can be represented by an IP multicast MAC address?
A. 1
B. 23
C. 32
D. 24
Answer: C
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NO.7 Which of the following statements about RSTP and STP is true?
A. STP has more port states than RSTP .
B. The port roles used in RSTP is less than the port roles used in STP .
C. Since RSTP adopts fast convergence mechanism, it does not have Learning state which is available
in STP .
D. Same as STP , the ports will enter into Listening state once the RSTP has been enabled. Then, the
ports can receive BPDU and calculate the spanning tree.
Answer: A
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NO.8 Which of the following statements about the link failure detection in STP protocol is not true?
A. When network topology is stable, the Designated Port sends BPDU packet at every Hello Time
interval.
B. When network topology is stable, BPDU packets will be transmitted periodically.
C. When the port does not receive new BPDU within a certain interval, the old configuration BPDU
will time out and the link failure can be detected.
D. The port sends Configuration BPDU at every Hello Time interval. When the link fails,
Configuration BPDU cannot be sent out. As a result, this port can detect the link failure.
Answer: D
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