chapter7 - Chapter 7 Networking and Security Connecting...

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CIS1000DE Chapter 7 Networking and Security: Connecting Computers and Keeping Them Safe from Hackers and Viruses
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CIS1000DE 2 Chapter Topics Networking fundamentals Network architecture Network components Peer-to-peer networks Ethernet networks Computer threats Computer safeguards Computer viruses
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CIS1000DE 3 Networking Fundamentals Computer network: Two or more computers connected together Devices connected to networks: nodes Benefits of a network: Sharing resources Transferring files A computer network is simply two or more computers that are connected together via software and hardware so they can communicate. Devices connected to a network are referred to as nodes . A node can be a computer, a peripheral (such as a printer), or a communications device (such as a modem). The main function for most networks is to facilitate information sharing, but networks provide other benefits as well. 1) they allow users to share peripherals 2). you can transfer files from one computer to another without using external storage media. If you install a device called a router to your network, you can share broadband Internet connections.
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CIS1000DE 4 Network Architecture Network designs: Locally administered: Peer-to-peer (P2P) Centrally administered: Client/server There are two main ways a network can be administered (or run): locally or centrally. A peer-to-peer network is the most common
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CIS1000DE 5 Peer-to-Peer Networks Nodes communicate with each other: Peers Share peripheral devices Used in home and small office networks In peer-to-peer (P2P) networks , each node connected to the network can communicate directly with every other node on the network, instead of having a separate device exercise central control over the entire network. Thus, all nodes on this type of network are in a sense peers. When printing, for example, a computer on a P2P network doesn’t have to go through the computer that’s connected to the printer. Instead, it can communicate directly with the printer. Because they are simple to set up, P2P networks are the most common type of home network.
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CIS1000DE 6 Client/Server Networks Client computers: Users who make requests Server computers: Provide resources to clients Central network control Internet A large, multiserver, multiclient network.
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CIS1000DE Most networks that have 10 or more nodes are client/server networks . A client/server network contains two different types of computers: clients and servers. The client is the computer on which user accomplish specific tasks and make specific requests. The server is the computer that provides information or resources to the client computers on the network. The server on a client/server network also provides central control for functions on the network (such as printing). The Internet is a client/server network. When your computer is connected to the Internet, it is functioning as a
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chapter7 - Chapter 7 Networking and Security Connecting...

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