T/F

1. Horizontal APIs in northbound and southbound enable communication among groups or federations of controllers to synchronize state for high availability.

2. OpenDaylight is both a protocol between SDN controller and network devices and a specification of the logical structure of the network switch functionality.

3. An abstraction layer is a mechanism that translate a higher-level request into the low-level commands required to perform the request.

4. The goal of CloudNaaS is to give customers increased control over their providers network.