Consider A Network Based On Dial-up Phone Lines, Where Sites Communic

1.	Consider A Network Based On Dial-up Phone Lines, Where Sites Communicate Periodically, Such As Every Night. Such Networks Are Often Configured With A Server Site And Multiple Client Sites. The Client Sites Connect Only To The Server, And Exchange Data With Other Clients By Storing Data At The Server And Retrieving Data Stored At The Server By Other Clients. What Is The Advantage Of Such An Architecture Over One Where A Site Can Exchange Data With Another Site Only By First Dialing It Up?
Answer» With the central server, each SITE does not have to remember which site to contact when a particular data item is to be requested. The central server alone needs to remember this, so data items can be moved AROUND easily, depending on which sites access which items most frequently.Other house-keeping TASKS are also centralized rather than distributed, making the system easier to DEVELOP and maintain. Of course there is the disadvantage of a total shutdown in case the server becomes unavailable. Even if it is running, it may become a bottleneck because every request has to be routed via it. With the central server, each site does not have to remember which site to contact when a particular data item is to be requested. The central server alone needs to remember this, so data items can be moved around easily, depending on which sites access which items most frequently.Other house-keeping tasks are also centralized rather than distributed, making the system easier to develop and maintain. Of course there is the disadvantage of a total shutdown in case the server becomes unavailable. Even if it is running, it may become a bottleneck because every request has to be routed via it.

Consider A Network Based On Dial-up Phone Lines, Where Sites Communicate Periodically, Such As Every Night. Such Networks Are Often Configured With A Server Site And Multiple Client Sites. The Client Sites Connect Only To The Server, And Exchange Data With Other Clients By Storing Data At The Server And Retrieving Data Stored At The Server By Other Clients. What Is The Advantage Of Such An Architecture Over One Where A Site Can Exchange Data With Another Site Only By First Dialing It Up?

Answer»

With the central server, each SITE does not have to remember which site to contact when a particular data item is to be requested. The central server alone needs to remember this, so data items can be moved AROUND easily, depending on which sites access which items most frequently.Other house-keeping TASKS are also centralized rather than distributed, making the system easier to DEVELOP and maintain. Of course there is the disadvantage of a total shutdown in case the server becomes unavailable. Even if it is running, it may become a bottleneck because every request has to be routed via it.

With the central server, each site does not have to remember which site to contact when a particular data item is to be requested. The central server alone needs to remember this, so data items can be moved around easily, depending on which sites access which items most frequently.Other house-keeping tasks are also centralized rather than distributed, making the system easier to develop and maintain. Of course there is the disadvantage of a total shutdown in case the server becomes unavailable. Even if it is running, it may become a bottleneck because every request has to be routed via it.

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