H3C
Exam Name: Constructing Enterprise-level Switching Networks
Exam code: GB0-323
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Question:
1.
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STP is a routing protocol.
A. True
B. False
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Answer: B
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Question:
2.
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802.1D defines the Disabled
state of STP. Which of the following is correct about the port in the Disabled
state? ( )
A. It does not
receive/send any packet.
B. It does not
receive/forward data. It receives but does not send BPDUs, and does not learn
addresses.
C. It does not
receive/forward data. It receives and forwards BPDUs, and does not learn
addresses.
D. It does not
receive/forward data. It receives and forwards BPDUs. It begins to learn
addresses.
E. It receives or forwards
data. It receives and forwards BPDUs. It begins to learn addresses.
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Answer: A
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Question:
3.
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The reason why RSTP can
implement fast restoration of the network is that ( ).
A. RSTP reduces the delay
from the Blocking state to the Forwarding state.
B. The port will enter the
Forwarding state immediately if the old Root port turn in the Blocking state
and the remote end of the new Root port is in the Forwarding state.
C. A non-edge Designated
port needs only one handshake with the downstream bridge to transfer from the
Blocking state to the Forwarding state quickly.
D. Soon after the bridge
is started, the edge port enters the Forwarding state without delay.
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Answer: A,B,C,D
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Question:
4.
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On the H3C S
middle-end/low-end switches, STP is enabled by default. ( )
A. True
B. False
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Answer: B
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Question:
5.
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In STP, it is suggested to
modify the value of Max Age indirectly through setting the network diameter. (
)
A. True
B. False
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Answer: A
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Question:
6.
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Multicast protocols fall
into group member management protocols and multicast routing protocols. Which
of the following is a group member management protocol? ( )
A. GVRP
B. GMRP
C. IGMP
D. PIM
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Answer: C
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Question:
7.
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IGMP is a signaling
protocol between hosts and the router, which defines the mechanism to establish
and maintain the multicast membership between hosts and the router. ( )
A. True
B. False
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Answer: A
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Question:
8.
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Which of the following
statements is correct? ( )
A. igmp timer query
seconds is used to set the interval of the query packet sending on the switch.
B. igmp timer query
seconds is used to set the maximum response time in the query packet.
C. igmp max-response-time
seconds is used to set the maximum response time in the query packet.
D. igmp timer
other-querier-present seconds is used to set the timeout time of the snooping
querier on the switch.
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Answer: A,C,D
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Question:
9.
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Which of the following is
correct about the PIM Hello message? ( ):
A. The Hello message is
sent periodically to all PIM routers in multicast group 224.0.0.13 to establish
PIM neighbourship.
B. The Hello message is
used to select the DR on the multi-access network.
C. As the IGMP message,
the Hello message is used to maintain the relationship between interfaces and
host members.
D. When IGMP V1 is adopted
on the interface, the Hello message is used to select the DR as the IGMP V1
querier.
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Answer: A,B,D
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Question:
10.
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SwitchA is an H3C S
Layer-2 switch. PC1, PC2 and PC3 connect to E0/1, E0/2 and E0/3 of SwitchA. The
three ports belong to VLAN 10, VLAN 20 and VLAN 30 respectively. A server
connects to port G1/1 of the switch, which belongs to VLAN100. The PCs are
required to isolate from each other, and the PCs shall be able to access the
server. After completing the configuration, which of the following statements
is right about the switch ports? ( )
A. E0/1 is an access port,
with the PVID VLAN 10.
B. E0/2 is a hybrid port,
with the Untagged VLAN ID 100, and the Tagged VLAN ID 10.
C. E0/2 is a Hybrid port,
with the Untagged VLAN IDs 20 and100, and the Tagged VLAN ID none.
D. G1/1 is a Hybrid port,
with the Untagged VLAN IDs 10, 20, and 30, and the Tagged VLAN ID 100.
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Answer: C
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