Summary
In this chapter, you learned about modularizing the network, with a focus on the following topics:
- The hierarchical network model's three layers: access, distribution, and core
- The Cisco SONA framework that integrates the enterprise-wide network
- The Cisco Enterprise Architecture functional areas:
- — Enterprise Campus: Including the Campus Infrastructure module (composed of the Campus Core layer, the Building Distribution layer, and the Building Access layer) and the Server farm module
- — Enterprise Edge: Including the E-commerce module, the Internet Connectivity module, the Remote Access and VPN module, and the WAN and MAN and Site-to-Site VPN module
- — Service Provider: Including the Internet Service Provider module, the PSTN module, and the Frame Relay/ATM module
- — Enterprise Branch
- — Enterprise Data Center
- — Enterprise Teleworker
- The infrastructure services and application networking services used within the Cisco Enterprise Architecture modules
- Security services to protect network resources and users from internal and external threats
- High-availability services to ensure adequate connectivity for mission-critical applications
- Voice services to support VoIP and IP telephony
- Wireless services to support mobile clients connecting to the enterprise network
- ANS to make the network aware of the content carried across it and to optimally handle that content
- Network management protocols and features, including SNMP, MIBs, RMON, NetFlow, CDP, and syslog
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