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Exam : Nortel 920-209
Title : NCDS-Multiservice Switch 7400/15000/20000


1. You are in the process of designing a new network. You need to determine the backbone bandwidth requirements of the network. One application has network traffic of 2000 Kbps, the network packet consists of a 512 byte payload and 6 bytes of overhead. What are the bandwidth requirements for the backbone for this application?
A. 2023 Kbps
B. 2340 Kbps
C. 2347 Kbps
D. 2006 Kbps
Answer: A

2. You have determined how each of the customer traffic types map to Multiservice Switch services. You have also calculated the amount of traffic within the network. What is your next step?
A. Choose FP types.
B. Engineer the backbone.
C. Check CP requirements.
D. Verify your performance metrics.
Answer: B

3. The design and implementation of any networking product imposes constraints on the ability of the network to support the required level of service. Which statement is true?
A. Nodal engineering involves configuring enough bandwidth in the path between each pair of sites to support the traffic.
B. Backbone engineering has enough ports to support the required number of access lines, that is, hardware engineering.
C. Backbone engineering involves verifying that the backbone has sufficient processor and memory resources to accept the user traffic and switch it to its destination, that is, service engineering.
D. Backbone engineering involves calculating the amount of traffic that will flow between each pair of nodes (based on the application information and COI from the internal inputs/requirements step of the engineering process).
Answer: D

4. The level of service for a customer can be measured in many ways. Which three items are measurements for level of service? (Choose three.)
A. availability
B. throughput
C. link utilization
D. response time
E. rate enforcement
Answer: ABD

5. Path load balancing is used to increase PNNI network reliability. Which three statements are correct? (Choose three.)
A. Multiservice Switch supports two load balancing techniques.
B. Path load balancing increases network stability in case of link or node failure.
C. Load balancing is intended to produce a balanced utilization of network resources.
D. Requirements include finding multiple diverse acceptable paths and selecting one of those paths.
Answer: BCD

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