Specifications

CHAPTER 1
Campus Network Design
n Client-Enterprise Edge applications are located on servers at the WAN edge, reachable from outside the company.
These can include email and web servers, or e-commerce servers, for example. Access to these servers must be
secure and highly available.
Service-Oriented Network Architecture
Service-Oriented Network Architecture (SONA) attempts to provide a design framework for a network that can deliver
the services and applications businesses need. It acknowledges that the network connects all components of the business
and is critical to them. The SONA model integrates network and application functionality cooperatively and enables the
network to be smart about how it handles traffic to minimize the footprint of applications.
Figure 1-3 shows how SONA breaks down this functionality into three layers:
n Network Infrastructure: Campus, data center, branch, and so on. Networks and their attached end systems
(resources such as servers, clients, and storage.) These can be connected anywhere within the network. The goal is to
provide anytime/any place connectivity.
n Interactive Services: Resources allocated to applications, using the network infrastructure. These include:
n Management
n Infrastructure services such as security, mobility, voice, compute, storage, and identity
n Application delivery
n Virtualization of services and network infrastructure
n Applications: Includes business policy and logic. Leverages the interactive services layer to meet business needs.
Has two sublayers:
n Application layer, which defines business applications
n Collaboration layer, which defines applications such as unified messaging, conferencing, IP telephony, video,
instant messaging, and contact centers
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CCNP SWITCH 642-813 Quick Reference by Denise Donohue