tailieunhanh - CompTIA Network+ Certification Study Guide part 4

CompTIA’s Network+ certification Study Guide part 4 is a globally-recognized, vendor neutral exam that has helped over 235,000 IT professionals reach further and higher in their careers. The 2009 Network+ exam (N10-004) is a major update with more focus on security and wireless aspects of networking. Our new study guide has been updated accordingly with focus on network, systems, and WAN security and complete coverage of today’s wireless networking standards. | 16 CHAPTER 1 Network Fundamentals can save their work to a dedicated server in a central location. This would keep everyone s files on one or more servers allowing their work to be kept secure and regularly backed up. Decentralized Distributed When a decentralized network model is used a network s resources are distributed through different areas of the network and administration is shared by designating responsibility to system administrators or individual users. For example printers may be scattered throughout an organization with managers of each office being responsible for assigning permissions to user accounts to use specific printers. By sharing administrative burdens in this way certain resources can now be managed by other members of the organization. A decentralized network model has a variety of servers equipment and other resources distributed across the geographical area making up the network. Although a network administrator may be able to access them over the computer network such network components aren t readily accessible physically. As such a network administrator must rely on people who are designated as system administrators in those locations. These people must be properly trained on the system and responsible enough to take matters like security seriously. If not something as simple as changing a backup tape could be problematic or even disastrous. Even if an organization initially decides on having a centralized network decentralizing the network may be the only viable option if cost factors or other issues come into play. For example if a company had a slow network connection between buildings users might find logging into the network saving data to a server or accessing network resources slow. One solution would be to put a server in each building so computers would be able to be authenticated and quickly access data on the server that s closest to them. By distributing servers in this instance network performance would improve because .

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