By default, routing protocols such as RIP exchange routing tables every 30 seconds. If placed as calls, these routine updates will drive up WAN costs unnecessarily, and Snapshot…

Computer Network Tutorial

Wide – Area Network Requirements  – Minimize bandwidth costs  – Maximize efficiency  – Maximize performance  – Support new/emerging applications  – Maximize availability  – Minimize management and maintenance Manage Bandwidth to Control Cost Because transmission…

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Analog services are the least expensive type of service. ISDN costs somewhat more but improves performance over even the fastest current analog offerings. Leased lines are the costliest…

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X.25 Devices X.25 networks implement the internationally accepted ITU-T standard governing the operation of packet switching networks. Transmission links are used only when needed. X.25 was designed almost…

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Leased Line Leased lines are most cost-effective if a customer’s daily usage exceeds four to six hours. Leased lines offer predictable throughput with bandwidth typically 56 Kbps to…

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Transmission Options or WAN Services There are a number of transmission options available today. They fall either into the analog or digital category. Next let’s take a brief…

Computer Network Tutorial

Circuit Switching  – Dedicated physical circuit established, maintained, and terminated through a carrier network for    each communication session  – Datagram and data stream transmissions  – Operates like a normal telephone call…

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So, what is a WAN? A WAN is a data communications network that serves users across a broad geographic area and often uses transmission facilities provided by common…

Computer Network Tutorial