Which of the following As_Path attribute values of path-filter1 permit* (100|400)$ command can the AS-Path filter configured with IP match? (Multiple Choice)

When there are multiple matching rules in the ACL of the VRP, which of the following statements is correct about the matching order?

When a packet is forwarded to the public network in the MPLS BGP VPN network in the domain, it will be encapsulated with two layers of MPLS labels. Which of the following description about the two-layer label is wrong?

Which of the following options may affect the establishment of IBGP neighbors? (Multiple Choice)

As shown in the figure, three switches SW1, SW2 and SW3, where SW1 is the root bridge, the link between SW1 and SW2 is congested, and SW2 cannot receive the configuration BPDU sent by the root bridge. Which spanning tree protection mechanism does the administrator need to configure to prevent link congestion?