When a network is designed using IS-IS protocol, which two circuit types are supported? (Choose two.)

Refer to the exhibit.

Which solution decreases the EIGRP convergence time?

An engineer must design a QoS solution for a customer. The network currently supports data only, but the customer will roll out VoIP and IP video in conjunction with the new QoS solution. The engineer plans to use DiffServ. To ensure priority for voice services, which model must the design include?

An architect is designing a network that will utilize the spanning tree protocol to ensure a loop-free topology.
The network will support an engineering environment where it is necessary for end users to connect their own network switches for testing purposes. Which feature should the architect include in the design to ensure the spanning tree topology is not affected by these rogue switches?

Which design consideration should be observed when EIGRP is configured on Data Center switches?