Basic network dictionary, components and concepts. The theory and operation of switched networks. TCP/IP network addressing and routing. IP subnets. Local Area (LAN), Wide Area (WAN) and Remote Access Services. Advanced network theory – Virtual Private Networks (VPN), Content Delivery Networks (CDN), Intranet, Extranet and wireless networks. Introduction to Cisco Internet Operating System (IOS). Initial configuration of Cisco Catalyst switches, and routers. Network management using Cisco Discovery Protocol (CDP), Telnet and Trivial FTP (TFTP). Connecting to the network via TCP/IP. Dangers of redundant switching. Spanning Tree Protocol. Concepts of VLANs and trunking. Distance Vector Routing Protocols. Link State Routing Protocols. Theory and configuration of RIP. How does IGRP work. Comparison of IGRP and EIGRP. How does OSPF work. How to use VLSM. Ways of using access lists. Configuring NAT and PAT. Point-to-Point serial encapsulation. Configuring PPP, CHAP and PAP. Establishing Frame Relay connections. Executing ISDN calls. Differences between BRI and PRI. Configuring DDR over ISDN BRIs.