Online Access Free 642-642 Practice Test

Which three factors will affect processing delay? (Choose three.)

• A.type of media
• B.IP switching method
• C.router architecture
• D.queuing mechanism
• E.distance of media
• F.CPU speed

Refer to the exhibit. A service provider is considering several alternative provisioning schemes for a new network. One proposed scheme involves aggregating 10-Mbps links from customers into a network with multiple 100-Mbps links to ensure that the network links have at least two times the capacity of the aggregate of the customer links.
What is the most appropriate description for the proposed scheme?

• A.Bandwidth-on-Demand
• B.overaggregate
• C.oversubscription
• D.overprovisioning
• E.CIR of 0

According to the best practices, which statement is true as related to the QoS policy that should be implemented on the outbound provider (P) to provider (P) router link in a service provider network that is supporting both VoIP and data?

• A.CBWFQ and CB-WRED should be implemented on the P router egress to provide a maximum bandwidth guarantee for the VoIP traffic.
• B.LLQ and CB-WRED should be implemented on the P router egress to support both VoIP and data traffic.
• C.In the DiffServ model, ingress and egress QoS mechanisms are only required on the provider edge (PE) routers, so no QoS policy is needed on the P to P link.
• D.CBWFQ and CB-RTP header compression should be implemented on the P router egress to ensure minimum latency for VoIP traffic.

To determine the bandwidth requirement for each VoIP call, not including Layer 2 overhead, how much bandwidth per call should be added to account for the voice signaling traffic?

• A.40 bps
• B.240 bps
• C.20 bps
• D.150 bps
• E.480 bps
• F.640 bps

Which of the following configurations requires the use of hierarchical policy maps?

• A.the use of CBWFQ inside class-based shaping
• B.the use of class-based WRED within a CBWFQ class queue
• C.the use of a strict priority-class queue within CBWFQ
• D.the use of both the bandwidth and shape statements within a CBWFQ class queue
• E.the use of nested class-maps with class-based marking