フリー問題

問題文

A provider that already runs plain Layer 3 VPNs is about to carry multicast inside them, and the core team asks what changes for the routers that sit in the middle of the provider network. What has to change for them?

選択肢

1. They have to peer with each of the CE devices that are being served
2. They have to gain a label for each of the prefixes that are served
3. They have to carry a VRF table for each of the customers being served
4. They have to hold the multicast state of each of the VPNs