The MPLS label is a 20-bit local identifier. When the administrator configures a static LSP, the incoming label and outgoing label can be manually specified. The value range is 0~1048575.

In an IPLS network, when the S field value of the MPLS message received by the Egress device is (), it indicates that the label is the bottom label of the stack and IP forwarding is performed directly.

As shown in the figure, VLAN aggregation is deployed in a switching network, where Sub-VLAN
10 and Sub-VLAN 20 are added to Super-VLAN 100. If PC1 and PC2, PC1 and PC3 are to be able to communicate with each other, which of the following descriptions about the L3 Switch interface type and the VLAN that should be allowed is correct?

The network and VPN planning of a certain enterprise is shown in the figure. Please match the sites through which business traffic can communicate one by one.

When a device is abnormal or fails, it will generate a variety of information. According to the severity or urgency of the information, the information is divided into 8 levels. Which of the following has the highest severity level?