問題文
An edge device leaves the core free of trees and copies each packet at the entry instead. Which option is correct about the tunnel identifier its route carries, about the direction from which the label in that attribute is assigned, and about the flag asking for leaf detail?
選択肢
- About a device that copies at the entry the tunnel identifier in its route names a routable address of its own, the label in that attribute leans on a downstream label, and the flag asking for leaf detail stays at nought on the wire, as the specification sets out.
- About a device that copies at the entry the tunnel identifier in its route names a reserved address of its own, the label in that attribute leans on an upstream label, and the flag asking for leaf detail stays at nought on the wire, as the specification sets out.
- About a device that copies at the entry the tunnel identifier in its route names a routable address of its own, the label in that attribute leans on an upstream label, and the flag asking for leaf detail stays at four on the wire, as the specification sets out.
- About a device that copies at the entry the tunnel identifier in its route names a reserved address of its own, the label in that attribute leans on a downstream label, and the flag asking for leaf detail stays at four on the wire, as the specification sets out.