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H3C Constructing H3C High-Performance Campus Networks Sample Questions:
1. Regarding TC protection, the following statements are correct
A) The system monitors whether the number of TC-BPDU packets received during this time period is greater than the threshold. If it is greater than the threshold, the device will delete the address table entry again after the time expires, so as to avoid frequent deletion and forwarding Address table entry
B) After the TC protection function is enabled, within 10 seconds after receiving the TC-BPDU message, the device allows the number of address table item deletion operations immediately after receiving the TC-BPDU message can be controlled by the user
C) After the switch receives the TC-BPDU message, it will delete the MAC address table entry
D) TC protection is configured in the system view
2. In the network as shown in the figure, the corresponding configuration is completed on the switch SWA, and the switch SWA and each PC have learned the corresponding ARPPCA to access the PCB and send the ICMP request message, and the switch SWA forwards this MAC address to the PCB as
A) MAC_A
B) MAC20
C) 0000.0000.0000
D) MAC10
3. After executing the display interface Ethernet 1/0/1 command on the switch SWA, the output information is as follows:
[SWA]display interface Ethernet 1/0/1
Ethernetl/0/1 current state: UP
PVID: 10
Mdi type: auto
Link delay is 0(sec)
Port link-type: trunk
VLAN passing: 1 (default vlan), 10
VLAN permitted: 1 (default vlan), 2-4094
Trunk port encapsulation: IEEE 802.1q
Port priority: 0
It can be judged from the above output
A) Data with VLAN1 tags will be discarded when entering port Ethemet1/0/1
B) Data frames with VLAN10 tags will be stripped of tags when they leave port Ethemet1/0/1
C) Data frames with VLAN20 tags cannot be forwarded from port Ethemet1/0/1
D) Data frames with VLAN10 tags will be discarded when they enter the port Ethernet1/0/1
4. As shown in the network, the switch enables RSTP, assuming that the cost of each link is the same, the following statements are correct:
A) If there are multiple alternate ports on the SWD, when the root port is down, SWD will select the port with the highest priority from these alternate ports as the new root port
B) Assuming that the spanning tree operating mode of SWB and SWC is modified to STP, the Alternate port of SWD can still enter the forwarding state directly after it becomes the new root port
C) If the SWD port EO/1 is down, the SWD port E0/2 will immediately change from the Alternate port to the new root port
D) After topology convergence, SWD will have one port as an alternate port
5. The customer's six switches SWA, SWB, SWC, SWD, SWE, and SWF are connected together through the LAN to form an RRPP ring. Check the RRPP status on SWB as follows:
<SWB>dis rrpp verbose domain 1
Domain ID: 1
Ring ID: 1
Ring Level: 0
Node Mode: Transit
Ring state:-
Enable Status: YesActive Status: Yes
Primary port: GigabitEthernet2/0/1 Port status: UP
Secondary port: GigabitEthernet2/0/2 Port status: UP
Ring ID: 2
Ring Level: 1
Node Mode: Edge
Ring state:-
Enable Status: YesActive Status: Yes
Common port: GigabitEthernet2/0/1 Port status: UP
GigabitEthernet2/0/2 Port status: UP
Edge port: GigabitEthernet2/0/3 Port status: UP
Ring ID: 3
Ring Level: 1
Node Mode: Edge
Ring state:-
Enable Status: YesActive Status: Yes
Common port: GigabitEthernet2/0/1 Port status: UP
GigabitEthernet2/0/2 Port status: UP
Edge port: GigabitEthernet2/0/4 Port status: UP
Know from the above information
A) GigabitEthernet2/0/1 is the edge port of RRPP subring 2
B) SWB is connected to 3 sub-rings
C) GigabitEthernet2/0/4 is the edge port of RRPP subring 3
D) SWB is the transit node of RRPP sub-ring 2
Solutions:
Question # 1 Answer: A,B,C,D | Question # 2 Answer: B | Question # 3 Answer: B,C | Question # 4 Answer: A,D | Question # 5 Answer: C |