H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. The following statements about BSR and RP in PIMSM are correct:

A) BSR is generated through an automatic election process between C-BSR
B) After receiving the C-RP announcement message, the BSR calculates the RP to be selected by each multicast group according to the relationship between the RP and the multicast group, and multicasts the calculation result
C) C-RP routers periodically send announcement messages in multicast mode
D) During C-BSR election, the priority is first compared, and then the IP address of the bootstrap message is compared

2. In the network connection shown in the figure, SWA and SWB are Layer 3 switches, running STP+VRRP, and after the initial configuration is completed, SWA is the root of STP and Master of VRRP, and SWC is the Layer 2 switch connected to the access terminal , The following description about network link failure is correct

A) When the link between SWA and SWB is interrupted, the topology of STP will change, and both upstream ports of SWC will become Forwarding
B) After the link between SWA and SWC is interrupted, the VRRP Master will remain unchanged, but the SWC downstream terminal will not communicate with the gateway.
C) When the link between SWA and SWC is interrupted, the topology of STP will change, and G1/0/2 of SWC will become Forwarding
D) When the link between SWA and SWB is interrupted, the VRRP Master will switch, and SWB will become the new VRRP Master

3. In the networking shown in the figure, the interconnection lines between RT1, RT2, RT3, RT4, and RT5 are all gigabit Ethernet cables, running OSPF, and after publishing the corresponding network segments to achieve routing interoperability, the routers all run the PIM SM protocol. RP means that RT4 has a receiver connected and IGMP is enabled on the corresponding interface. When the initial multicast traffic forwarded along the RPT meets the conditions for switching to SPT, which of the following routers will receive the (S, G) join message?

A) RT4
B) RT3
C) RT2
D) RT1
E) RT5

4. 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. VLAN10 is created on the switch SVVA, and VLAN20 is created on the switch SWC. Check the status information of each Trunk port on the three switches. The correct one is displayed below

A) [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), 10,20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
B) [SWA]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), 10,20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
C) [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), 10,20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
D) [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), 10,20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q

5. In the switching network as shown in the figure, set VLAN10 as Isolate-user-vlan VLAN2 and VLAN3 as the Secondary VLAN of VLAN10 on the switch SWA. VLAN10 virtual interface link layer UP on the following switch SWA? (Select one or more )

A) GigabitEthernet1/0/2 port UP
B) GigabitEthernet1/0/1 port is up
C) GigabitEthernet1/0/1, GigabitEthernet1/0/2 and GigabitEthem1/0/3 are all up
D) GigabitEthernet1/0/3 port is up

Solutions: