COMP5980_Final - 1. Describe the differences between a...

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1. Describe the differences between a local area network (LAN) and a wide area network (WAN). A local area network (LAN) is used to connect computers within a localized area, such as a single floor of an office building or a section of a manufacturing floor. A wide area network (WAN) is used to connect multiple LANs, sometimes in a world- wide network. Finally, sometimes the term metropolitan area network (MAN) is used to describe a network of LANs in a single geographic area, such as a city. Thus, a corporation with locations in Orlando, Miami, Bithlo, Gotha, and Los Angeles could have several LANs in each location, with the connection of the LANs in each location termed a MAN. The network used to connect all locations could then be called a WAN. In most usages, the term MAN is omitted in favor of WAN. 2. Describe “peer to peer” and “server based” local area networks. Discuss their relative advantages and disadvantages. Peer-to-peer networks. In this type of network, each PC (also called a node or host or workstation) can function as both a client and a server. There is no central control of the network or of the access to the various resources on the network. Instead, each PC user controls the access to the resources on his/her PC using share-level security. In this type of security, each user determines which resources on the PC will be shared, and what type of access will be granted to these resources. A password can then be assigned to any shared resource. The user is responsible for administering the password and providing it to any users who need it. Advantages of peer-to-peer networks: Low cost to set up, with no central server, no network operating system, and no dedicated network administrator Easy to set up Easy to maintain when there are less than 10 users Disadvantages of peer-to-peer networks: There is no central administration, thus leaving the administration of the network to the collective users Data is scattered across all PCs rather than being stored on a central server Security is very weak due to its design All users must be trained in how to share resources Server-based networks. Almost all business networks are server-based, meaning that there is at least one dedicated server on the network to provide centralized services and administration for the client PCs. A server is typically a more powerful workstation dedicated to one or more centralized tasks and services. Types of servers typically found on networks include: File servers: provide central storage of files which can be shared among client users. Print servers: provide central control and access for printers which can be shared by client users.
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Application servers: provide central application processing. Database servers:
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This note was uploaded on 06/09/2011 for the course BUSINESS 5970 taught by Professor Jhon during the Spring '09 term at Webster.

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COMP5980_Final - 1. Describe the differences between a...

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