A.MPLS LDP must be enabled.
B.BGP routing protocol must be running.
C.Named access-lists must be configured.
D.Symmetrical routing is required.
E.Domain name must be defined

A.Allows incoming TCP connections destined to port 179
B.Allows incoming TCP connections sourced from port 179
C.Allows incoming TCP connections from 1.1.1.1 and destined to，or sourced from port 179
D.Allows incoming TCP connections from 1.1.1.1 that are destined to port 179
E.Allows incoming TCP connections from 1.1.1.1 that are sourced from port 179