To benefit from the central resources and communications, a remote user usually has at least one wide area connection to the central site. The bandwidth requirements for the wide area connection depend on the kind of network services that the employers want to use in their job. If remote employees are part of the IP telephony network, a call manager device may need to be placed remotely. The network architect must think through whether the remote users need access to video resources concurrently. This kind of access will impact bandwidth. For instance, streaming video may be used for a business meeting. These design decisions involve evaluating the bandwidth at the central site wide area connection as well.
Selecting a Permanent or On Demand link
The net architect chooses whether it is superior to use permanent or on-demand links to the central location. The architect works with the client to consider security, cost as well as availability requirements.
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.
Selecting a Permanent or On Demand link
The net architect chooses whether it is superior to use permanent or on-demand links to the central location. The architect works with the client to consider security, cost as well as availability requirements.
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.
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