A high-speed Internet link is a good choice for outworkers. It is easy to install in remote offices and is also available in many hotels. Occasionally, asynchronous dialup links are the one and only remote access solution accessible to travelers. Personnel who travel can use a laptop with a modem and the current telephone net to connect to the enterprise.
Wide area network connections at teleworker sites can use the following technologies: Asynchronous dialup, ISDN BRI, Cable modems, DSL, Wireless and satellite, VPN, Traffic Flow.
Traffic flow on a net is analogous to the car traffic flow on metropolitan streets. Vehicles move from one place to another throughout the city. Data traffic created from applications moves from one place in the net to another. The route is usually defined by a Net Layer TCP/IP address. Depending on the quality of service policies configured in the net, the route can be influenced by additional factors like Transport Layer source and destination port numbers. Let's say, a host sends a request for a shared folder to a server in one traffic flow. The server examines the request and if the user has the expected permissions, returns the data to the user in another traffic flow.
Traffic Control
Without a method of traffic control, like traffic signs or alternative roads to retain the flow, traffic on the highways becomes congested. Nets also need a path to regulate traffic flows. Quality of service mechanisms are created to guarantee the smooth traffic flow of application data traffic on the net.
Traffic flow is very important for all the networks and this is what really differentiates a good for a bad network.
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