H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. In the switching network as shown in the figure, all three switches only have the default VLAN1, the interconnection ports of the three switches are trunks, and all VLANs are allowed to pass, and the three switches have the global and port GVRP functions enabled. VLAN 10 is created on the switch SWA, VLAN 20 is created on the switch SWC, and the GVRP registration mode of the Ethernet1/0/1 port on the switch SWA is set to Fixed, and the VLAN existing on the SWA is executed on the display vlan SWA (select one or Multiple)

A) VLAN20
B) VLAN 10
C) VLAN1

2. In the networking shown in the figure, the interconnection lines between RT1, RT2, RT3 and RT4 are all 1000Mbps links except for the 10Mbps link sharing the Ethernet part, and the four routers run OSPF protocol to make the routing interoperable. The PIMSM protocol is running between them, and the RP is 1.1.1.1. There are receivers on the downstream interfaces of RT1 and RT2, and IGMP is enabled on the corresponding interfaces. Then, when the receiver (Received) sends a group join request, which of the following routers exist (*, G) table entry

A) RT1
B) RT3
C) RT4
D) RT2

3. Regarding the rapid switching mechanism of designated ports in RSTP, what are the correct statements?

A) When the designated port in RSTP is in Discarding state, RSTBPDU with Proposal set to be sent
B) The designated port fast switching mechanism must be on the point-to-point link
C) The purpose of the synchronization process is to eliminate the possibility of loops locally on the bridge, and all designated ports need to be blocked during the synchronization process
D) The designated port receives the RST BPDU with the Proposal bit set, and the disadvantage is that this port is a follower port, the port will send the RST BPDU with the Agreement bit set

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) 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
B) After topology convergence, SWD will have one port as an alternate 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) 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

5. The two routers are connected through the LAN to form a VRRP backup group. The VRRP timer configuration on each interface is as follows:
[RTA-GigabitEthernet1/0]vrrp vrid 1 timer advertise 5
[RTB-GigabitEthernet1/0]vrrp vrid 1 timer advertise 5
VRRP backup group 1 is operating normally, RTA is the Master and RTB is the Backup. If the router RTA fails after the device runs for a period of time, the time for the router RTB to change from Backup to Master may be

A) 3 seconds
B) 5 seconds
C) 12 seconds
D) 20 seconds

Solutions: