Refer to the exhibit.

Assume that no multicast optimization is done on LAN switches A and B.
Which feature can be used to optimize multicast traffic forwarding in this situation?

The Service Provider you work for wants to deploy CoS functionality on the P routers of the MPLS core, to provide a complete CoS solution to all customers that purchase services such as dedicated Internet access, MPLS Layer 3 VPN, and Layer 2 VPN (pseudowire). The design requirements are:
The network supports four service queues with equal treatment for delay, jitter, and packet loss.
Queues are numbered 03, where 0 is the default queue. Three queues have one treatment, whereas the other queue has either one or two treatments.
The Service Provider manages control traffic, whereas the customers manage business critical and best effort.
Which two statements could you recommend to allow for the appropriate level of bandwidth allocation?
(Choose two.)

Which mechanism provides fast path failure detection?

A company is planning to connect its 30 sites with a VPLS WAN backbone. A router at each site should establish neighborships with all other routers using the OSPF routing protocol. Which three points must be considered regarding DR and BDR when different router platforms are used? (Choose three.)

Which design concern should be accounted for in all Layer 3 virtualization technologies?