When all interconnected ports are UP and STP and OSPF calculations are complete, which of the following descriptions of network connectivity are correct?

SWA/SWB/SWC are in the same MSTP region and configured with the same region configuration

Stp region-configuration region-name h3c

Instance 1 vlan 10

Instance 2 vlan 20

Instance 2 vlan 30

Active region-configuration

The ports of the three interconnected links are all Access and belong to the VLANs identified in the figure. The three switches create VLAN virtual interfaces corresponding to the Access links and run OSPF on the virtual interfaces. The IP addresses of the VLAN virtual interfaces are assigned as follows:

SWA: vlan-interface 10 (192.168.10.1); vlan-interface 30 (192.168.30.1)

SWB: vlan-interface 10 (192.168.10.2); vlan-interface 20 (192.168.20.1)

SWC: vlan-interface 20 (192.168.20.2); vlan-interface 30 (192.168.30.2)

When all interconnected ports are UP and STP and OSPF calculations are complete, which of the following descriptions of network connectivity are correct?
A . The three switches can establish OSPF neighbor relationships between each other
B . Two of the three switches cannot establish an OSPF neighbor relationship
C . All interconnected addresses of the three switches are reachable to each other
D . Among the 6 interconnected addresses, at least two interconnected addresses are unreachable to each other

Answer: A

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