問題文
A provider runs several instances of the link state protocol on one circuit, and each instance carries more than one topology. An engineer has to record which circuits a topology specific advertisement travels over, and how the adjacencies of the several topologies of one instance stand to one another. Which statement is correct?
選択肢
- It travels only over circuits where both ends name that topology in their greeting, and the topologies of one instance share one set of adjacencies belonging to that instance.
- It travels over every circuit that carries the instance, and the topologies of one instance share one set of adjacencies belonging to that instance.
- It travels only over circuits where both ends name that topology in their greeting, and each topology of one instance holds a set of adjacencies of its own.
- It travels over every circuit that carries the instance, and each topology of one instance holds a set of adjacencies of its own.