A.The BFD one-arm echo function must be configured with local identifiers and carrier identifiers

B.After the BFD one-arm echo function is turned on, the destination IP and source IP of the BFD message are inducted

C.BFD One-Arm Echo function is suitable for scenarios where one device supports BDD and the other device does not support

D.The default destination IP address for the protocol message for BFD one-arm echo is 22400184

A.A maximum of two layers of tags need to be used in the message forwarding process.

B.VPN routes are exchanged directly between the ingress PE and egress PE and do not require an intermediate device to secure a circular VPN route.

C.VPMV4 routes are not saved on the ASBR, and VPNv routes are not advertised to each other.

D.Cross-domain VN-Optionc, which is not suitable for use when spanning multiple AS.

A.AS External LSA

B.Router LSA

C.Summary LSA

D.Network LSA

A.RSVP requests resource reservation

B.from CE Layer 2 links

C.IP prefix

D.BGP MED ?

A.Man-in-the-middle attack

B.Source P address spoofing attack

C.Flood Attack

D.Single packet attack