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Cisco S2-C2

Cisco S2-C2. Wide Area Networks. 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. WAN Physical Standards.

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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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