The Option field in OSPEv3 appears in all LSAs

Which nationality meets the following two conditions: 1] BGP Router A can choose whether the Ulpdate message is based on the nationality. ( ) If Router B receives a Updae message containing a cross-hatch, run-by B does not have an identified solidity, but will also contain a multifaceted] Ulpdate retracts the advertisement to Router C.
Router C may recognize and apply this attribute. (Multiple choice questions).

Regarding how the device handles messages in the MPLS network model, what is the following description of the error?

What designs in the router can improve the reliability of the router?

There is an As-path-filter.ip as-path-filter 1 permit*(100l400) $, which As-path-filter can match which of the following AS_PATH Attribute?( Confirmed).