H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. In the switching network as shown in the figure, VLAN10 is set as Isolate-user-vlan on switch SWA, VLAN2 and VLAN3 are set as Secondary VLAN of VLAN 10; VLAN2-VLAN20 is created on switch SWB, and VLAN20 is set as Isolate-user-vlan , VLAN4 is the Secondary VLAN of VLAN20. After setting the IP address of each device as shown in the figure, the following statement is correct (choose one or more)

A) SWB packets enter from SWA's GigabitEthem1/0/3 port, and after exiting from GigabitEthem1/0/1 port, the VLANTag carried is VLAN2
B) The PCA packet comes out of the GigabitEthem1/0/3 port of SWA and enters the GigabitEthe1/0/3 port of SWB, and the VLAN Tag carried is VLAN2
C) The packet of PCA enters from the GigabitEther1/0/1 port of SWA, and does not carry the VLAN tag after exiting from the GigabitEther1/0/3 port
D) When SWB accesses PCA, the VLAN tag carried by GigabitEthem1/0/4 of SWB is VLAN 1

2. As shown in the networking, SWB and SWC enable STP, SWC is the root, SWA does not enable STP, initially Link 2 is not connected, PCB can send data to PCA, if Link 1 fails at this time, maintenance personnel will link 2 is connected, the statement about the recovery process of the PCB to PCA data transfer service is correct (assuming that the PCA will not actively send data)

A) SWA port E0/1 will not send TCN BPDUs to SWC after the link is interrupted
B) The SWB port E0/1 enters the Forwarding state to trigger the topology change process, which shortens the MAC address aging time, so the business recovery from PCB to PCA requires a total of 45 seconds by default.
C) SWB port E0/1 needs to wait for the default 30 seconds to enter the forwarding state, so the business recovery from PCB to PCA requires a total of 30 seconds by default
D) Since SWA does not enable STP, service recovery needs to wait for the MAC address of SWC to age, which takes 300 seconds by default

3. The multicast IP address is 229.130.130.1, and its corresponding MAC address is:

A) 01-00-5E-02-82-01
B) 00-00-5E-02-82-01
C) 01-00-5E-82-82-01
D) 00-00-5E-82-82-01

4. In the switching network as shown in the figure, all three switches only have default VLAN1, the interconnection ports of the three switches are all Trunks, and all VLANs are allowed to pass, and all three switches have the global and port GVRP functions enabled. VLAN 10 is created on the switch SWA, VLAN 20 is created on the SWC, and the GVRP registration mode of the Ethemet1/0/1 port is set to Fixed on the switch SWA, and the status information of each Tmnk port is checked on the three switches. The correct one is displayed below (Choose one or more)

A) [SWB]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 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
B) [SWB]display interface Ethernet 1/0/2 Ethernet1/0/2 current state: UP ...... PVID: 1 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
C) [SWA]display interface Ethernet 1/0/1 Ethernetl/0/1 current state: UP ...... PVID: 1 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
D) [SWC]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 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

5. 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 frames with VLAN10 tags will be discarded when they enter the port Ethernet1/0/1
B) Data frames with VLAN20 tags cannot be forwarded from port Ethemet1/0/1
C) Data frames with VLAN10 tags will be stripped of tags when they leave port Ethemet1/0/1
D) Data with VLAN1 tags will be discarded when entering port Ethemet1/0/1

Solutions: