Among the following types of LSAs, the ones allowed to exist in the backbone area are _________

There are two detailed routes 50.50.1.0/24 and 50.50.2.0/24 in the BGP routing table. The AS_PATH is 100 200i and 100 300i respectively. Configure the ggregate 50.0.0.0 255.0.0.0 detail-suppressed in the BGP a view. What is the AS_PATH for route 50.0.0.0/8 ?

After executing the display ospt routing command on the MSR router RTA, the router output is as follows

Judging from the above output

Which of the following actions cannot be performed by the appl clause in a PBR configuration?

Host A and Host B are on the same Ethernet link. After host A receives the NS message sent by host B, it will record the correspondence between the IPv6 address of host B and the link layer address in the neighbor cache table.
At this time, the host is on A, and the neighbor state of host B is _______.