Which three statements are true about class-of-service (CoS) schedulers? (Choose three )

• A.Schedulers determine the packet transmission rate for each queue.
• B.Schedulers determine into which queue a packet should be assigned.
• C.Schedulers determine the packet markings that are used to prioritize traffic.
• D.Schedulers determine the size of buffer assigned to each queues.
• E.Schedulers determine how packets are handled during times of congestion.

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You are creating a WAN solution design for an enterprise customer. The customer will be connecting three sites in different locations. The customer wants all of the sites to be part of the same Layer 2 network.
In this scenario, what are two valid connection methods that you would provide in your design? (Choose two.)

• A.Internet WAN
• B.Layer 2 VPN
• C.Layer 3 VPN
• D.VPLS

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You are asked to design a BNG solution using MX Series routers You want to dynamically assign per-subscriber configuration parameters using VSAs.
Which external service is required to accomplish this task?

• A.TACACS
• B.802.1X
• C.RADIUS
• D.DHCP

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You are asked to design a DDoS prevention system to help mitigate denial-of-service attacks that target your customers. The management group wants to know the effect remote triggered black holes may have on current network operations if they are implemented as a solution.
Which three statements are correct in this scenario? (Choose three)

• A.RTBH can block legitimate user traffic in the network.
• B.RTBH can block all traffic based on the source of an attack.
• C.RTBH can block all traffic based on the destination of an attack
• D.RTBH can detect the origin of an attack, regardless of NAT technologies.
• E.RTBH can automatically deled denial-of-service attacks and block traffic destined to the target.

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Which two statements describe why service providers have migrated to IP/MPLS networks? (Choose two.)

• A.MPLS labels enable several logically separated networks to share a common network infrastructure.
• B.MPLS virtualization allows a service provider to use statistical multiplexing to maximize resource utilization.
• C.The MPLS ingress router encapsulates IP packets in an MPLS frame and forwards it to the next router in the path.
• D.A single router can be an ingress, egress or transit router for multiple LSPs simultaneously.

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