Which of the following are not included in the security protection actions that a secure MAC address can perform?

LDP messages are exchanged between LSRs running the LDP protocol. LDP messages can be divided into four types according to their functions. Which of the following is not an LDP message type?

In OSPF, ABR will convert all Type 7 LSAs in the NSSA area into Type 5 LSAs.

Which of the following functions will affect BGP neighbor establishment? (Multiple choice)

Which description is correct about the MPLS forwarding mechanism? (Multiple choice)