Networking: A Beginner’s Guide Fifth Edition- P25 doc

... Usenet reader (also called a news reader) and a Usenet server. It also provides for message formatting, so messages can be text-based or can also contain binary attachments. Binary attachments ... just as data packets do over the Internet. Also, available circuits would be used more efficiently, allowing more calls to be routed within a particular geographic area. VoIP also has some...

Ngày tải lên: 05/07/2014, 04:20

... are usually accomplished with a stand-alone computer—called a gateway server—that handles the e-mail interface between the two systems, by using gateway software that is part of the file-based ... server-based applications that are packaged together to make them more economical for smaller companies. N Use mailboxes from a service provider that runs a high-end e-mail system (and h...

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... physical layer so the network layer (layer 3) can transmit its data. The data-link layer typically includes error detection and correction to ensure a reliable data stream. The data elements carried ... part of the physical layer. Data-Link Layer The data-link layer, layer 2, defines standards that assign meaning to the bits carried by the physical layer. It establishes a reliable prot...

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... guessed it a much thicker coaxial cable called RG-8. Figure 4-6 shows an example of coaxial cable. Fiber-optic cable uses a glass strand and carries the data signals as light instead of electricity. ... using connectors and patch cables that also meet that level of performance. For example, for a Cat-5 installation, you must have Cat-5 cable, connectors, patch panels, and patch cabl...

Ngày tải lên: 05/07/2014, 04:20

... This area is continuing to evolve very rapidly, and a solution purchased today may not be compatible with equivalent hardware available in a couple of years. Chapter Summary In this chapter, ... equipment transmits its information through the power wiring, and all that’s needed is to plug a special adapter into an available outlet near each computer. Be aware that powerline networks...

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... model, the application layer. Network layer units of data, such as those carried by IP, are called datagrams. Units of data carried at the data-link layer (layer 1) are called frames. All of these ... than IP, at the transport layer. TCP manages connections between computers. TCP messages are carried (encapsulated) in IP datagrams. The User Datagram Protocol (UDP) serves the same role as...

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... time is available to make the backup? Make sure that you avoid situations where you need to back up terabytes of data using a system that can handle only megabytes per hour. N If a partial or ... cost/MB 170 Networking: A Beginner’s Guide N Protect against backup media failure N Protect the data from an environmental failure, such as a fire, that destroys the original system...

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... them. And if a computer does not, then it can be added as a network interface card. NICs are also usually specific to the cable media you have installed. For example, Ethernet NICs are available ... dialog box in Windows Vista 203 Chapter 14: Purchasing and Managing Client Computers You can also improve serviceability if you standardize on a particular manufacturer because then you...

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... You are asked whether to perform an upgrade installation or a custom (clean) installation of Windows Server 2008, as shown in Figure 16-5. If you are installing on a computer that has an upgradable ... log in. 12. After you set your password and log in, you will soon see the new server’s desktop, along with the Initial Configuration Tasks window (which appears automatically), as show...

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... checkbox. You can choose any combination of roles that you need, and the wizard will walk you through any necessary additional setup with a minimum of hassle. In this example, we are installing Windows ... networking 246 Networking: A Beginner’s Guide CAUTION Join an existing forest only if you are the network administrator responsible for the existing Active Directory forest, a...

Ngày tải lên: 05/07/2014, 04:20