tailieunhanh - Networking: A Beginner’s Guide Fifth Edition- P9

Networking: A Beginner’s Guide Fifth Edition- P9:I have run into many people over the years who have gained good even impressive working knowledge of PCs, operating systems, applications, and common problems and solutions. Many of these people are wizards with desktop computers. | 22 Networking A Beginner s Guide Difficult to back up Reliably backing up all the data scattered over many workstations is difficult and it is not wise to delegate this job to the user of each machine. Experience shows that leaving this vital task up to users means it will not get done. Hard to maintain version control In a peer-to-peer network with files potentially stored on a number of different machines it can become extremely difficult to manage different document versions. Pros for Client Server Networks Client server networks offer the opportunity for centralized administration using equipment suited to managing and offering each resource. Client server networks are the type commonly used for networks larger than about ten users and there are quite a few good reasons for this as follows Very secure A client server network s security comes from several things. First because the shared resources are located in a centralized area they can be administered at that point. Managing a number of resources is much easier if those resources are all located on one or two server computers as opposed to needing to administer resources across tens or hundreds of computers. Second usually the servers are physically in a secure location such as a lockable server room. Physical security is an important aspect of network security and it cannot be achieved with a peer-to-peer network. Third the operating systems on which client server networks run are designed to be secure. Provided that good security and administration practices are in place the servers cannot be easily hacked. Better performance While dedicated server computers are more expensive than standard computer workstations they also offer considerably better performance and they are optimized to handle the needs of many users simultaneously. Centralized backup Backing up a company s critical data is much easier when it is located on a centralized server. Often such backup jobs can be run overnight when the server is