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Cisco S2-C2

This guide provides a comprehensive overview of Wide Area Networks (WANS), including their operation over slower speeds, connection methods, devices, and key physical standards like EIA/TIA protocols. Explore WAN technologies such as ISDN, Frame Relay, and T1/T3 lines. Learn about router fundamentals, including ROM, RAM, NVRAM, and Flash memory, as well as their functionalities in data processing and network connectivity. This resource is essential for understanding internetwork services, dynamic routing, and developing router topologies in a lab environment.

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Cisco S2-C2

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  1. Cisco S2-C2 Wide Area Networks

  2. WANS • Operate at slower speeds over wide area • Use RBOC (approximately 80% of data communications) • Use serial connections • Devices include: • Routers, Modems, ATM Switches, Communication Servers • Provide full- and part-time connectivity

  3. WAN Physical Standards • EIA/TIA-232 • EIA/TIA-449 • V.24 • V.35 • X.21 • G.703 • EIA-530

  4. WAN Protocols • HDLC – High Level Data Link Control • PPP Point to Point • ISDN Integrated Services Digital NW • Frame Relay • ATM Asynchronous Transmission Mode

  5. WAN Physical Layer • WAN physical layer describes the interface between the data terminal equipment (DTE) and the data circuit-terminating equipment (DCE). • Typically, the DCE is the service provider and the DTE is the attached device. • Services can be offered to the DTE through a modem or a CSU/DSU

  6. WAN Technologies • POTS, ISDN, X.25, Frame Relay • ATM, SMDS, T1, T3 (E1, E3 in Europe) • SDSL, Cable Modem, Dial-up Modem • Sonet, Terrestrial Wireless, Satellite Wireless • Refer to chart to study speeds (bandwidth) and comments – both are important

  7. Router Basics • ROM – startup diagnostics, stores backup O/S • RAM – where all processing takes place- stores running-config • NVRAM – stores startup-config • Flash – stores O/s and microcode • Interface – connections through which data and packets enter router

  8. Internetwork Services • consistent end-to-end addressing • addresses that represent network topologies • best path selection • dynamic routing • switching

  9. Lab • Subnet • Develop Router Topology • Startup Router

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