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Emerging Multiservice Network Architecture

Table of Contents:
Definition and Overview
1. Introduction
2. Major Market Trends Affecting Carrier Network Architectures
3. Provisioning Integrated Services on Legacy Platforms
4. The New Converged Multilayer Switch Platform
5. Multilayer Switching Architecture
6. Conclusion
Self-Test
Glossary
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Self-Test
1. Data traffic is characterized as which of the following?
a. a predictable stream, like voice traffic
b. a predictable stream, unlike voice traffic
c. bursty, like voice traffic
d. bursty, unlike voice traffic
2. Statistical multiplexing is efficient for bursty traffic because it accomplishes which of the following?
a. fills the transmission medium with packets, which can be utilized as needed
b. allows the circuit to sit idle when nothing is being transmitted
c. dedicates connection-oriented TDM circuits to particular applications
d. devises a queue for traffic
3. The agility to respond to customers' changing needs fastest comes from which of the following sources?
a. network infrastructures with a rich set of features and functionality
b. the support of multiple interfaces
c. distributed, software-defined intelligence
d. all of the above
4. Legacy voice-data overlay networks accomplish which of the following tasks?
a. lower costs
b. duplicate equipment and facilities
c. speed up service provisioning
d. make troubleshooting easier
5. Voice, private line, and data are integrated today in the _________________.
a. TDM DCS
b. copper local loop
c. SONET transport backbone
d. none of the above.
6. Leveraging an architecture based on multilayer switching provides which of the following benefits?
a. simplifies the network
b. provides flexibility to offer a wider range of services
c. reduces the cost of infrastructure and operations
d. all of the above
7. Which of the following is an advantage of the first-generation multiservice switches?
a. support for many different protocols
b. a variety of protocol-specific hardware in each chassis to meet customer needs
c. better integration of multiple advanced services into a common chassis
d. both a and c
8. Which of the following is a disadvantage of the first-generation multiservice switch?
a. support for many different protocols
b. a variety of protocol-specific hardware in each chassis
c. better integration of multiple advanced services into a common chassis
d. no need to purchase and manage several different switches to support many different protocols
9. The breakthrough concept of the second generation of multiservice switches was which of the following?
a. SONET
b. QoS
c. ASAP@
10. The third generation of multiservice switches ________.
a. like its predecessors, provides ATM–based packet switching in the backbone
b. requires a varied inventory of protocol-specific hardware
c. scraps the software-based network infrastructure used in second-generation switches
c. requires physical manipulation of cables and connectors to configure services
Glossary >>

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