A packet sent to a multicast address reaches what destinations?

An engineer uses Postman and YANG to configure a router with:
OSPF process ID 400
network 192.168.128.128/25 enabled for Area 0
Which get-config reply verifies that the model set was designed correctly?

An engineer is designing an enterprise campus network.
The LAN infrastructure consists of switches from multiple vendors, and Spanning Tree must be used as a Layer 2 loop prevention mechanism.
All configured VLANs must be grouped in two SIP instances.
Which standards-based Spanning Tree technology supports this design solution?

Refer to the exhibit.

A network engineer must design a multicast solution based on:
* Many-to-many communications between the users and sources
* Support of up to 50 multicast sources
* Users that must register for steams
Which multicast solution must the engineer select?

Which design consideration must be made when using IPv6 overlay tunnels?