Chapter 1. Network Architecture

Modern converged networks include different traffic types, each with unique requirements for security, Quality of Service (QoS), transmission capacity, and delay. Some examples include:

  • Voice signaling and bearer

  • Core application traffic, such as Enterprise Resource Planning (ERP) or Customer Relationship Management (CRM)

  • Database transactions

  • Multicast multimedia

  • Network management

  • “Other” traffic, such as web pages, e-mail, and file transfer

Cisco routers are able to implement filtering, compression, prioritization, and policing (dedicating network capacity). Except for filtering, these capabilities are referred to collectively as QoS.

Although QoS is wonderful, it is not the only way to address bandwidth shortage. Cisco ...

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