Ethernet Networking- P7

Ethernet Networking- P7:One of the biggest problems when discussing networking is knowing whereto start. The subject of computer networks is one of those areas for whichyou have to "know everything to do anything." Usually, the easiest way toease into the topic is to begin with some basic networking terminology andthen look at exactly what it means when we use the word Ethernet.
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Ethernet Networking- P7168 Network Servers: Files, the Web, and PrintersShared Printer Architectures There is more than one way to connect a printer to a network: $ Connect a printer to a desktop computer and share that comput- er with other users. $ Connect a printer to a server and use that computer as a print sever. $ Connect a printer to the network, perhaps with a stand-alone print server as an intermediary. Why do you need a print server? Because a printer is much slower than the network. Users can send print jobs to the printer much faster than the print- er can print them. The solution to traffic jams on the way to the printer is print spooling, a technique in which the print server places copies of the print jobs on disk in a waiting area, known as a print queue. A print server is software, running either on a computer or on a small, stand-alone device, that manages the print queue. It takes care of adding jobs to the queue, sending them to the printer as the printer becomes available, and providing an interface for a system administrator to manage the queue. The last printing o p t i o n ~ a stand-alone print s e r v e r ~ i s the easiest to in- stall and maintain. The printer server, which is usually no bigger than an eight-port unmanaged switch, attaches between the printer and the net- work. You then configure each workstation that will use the network-at- tached printer. (Windows machines typically need to have a printer driver installed before searching the network for the printer; Mac OS X machines usually wont need a driver but will still need to search the network to rec- ognize and add the printer.) The print-server has enough intelligence to accept print jobs from across the network. It requires no maintenance.Occasional Printer Sharing If you have printer that needs to be shared infrequently, then you may want to attach that printer to a workstation and share that printer through the workstation, rather than through a print server. To make it happen, the own- er of the workstation has to turn on the printer sharing service.Print Serving 169 Note: Every time you turn on an operating system service, you open a hole that a malicious hacker can sneak through. Al- though printer sharing through a workstation may be conve- nient, it may also be dangerous. Consider carefully whether you want to allow it because of the security exposure.Windows By default, current versions of Windows turn off printer sharing as a secu- rity measure. (It disables all remote access to a computer.) This means that you must first use the Network Setup Wizard to allow remote access before you can actually share the printer. To allow other computers to share a workstation-attached printer: 1. Launch the Network Setup Wizard. 2. Continue to click the Next button until you reach the panel in Figure 8-7. 3. Complete the Network Setup Wizard, save the settings, and then re- start the computer. Figure 8-7: Turning on Windows printer sharing At this point you are ready to allow other users access to any printer con- nected to the computer: 1. Open the Control Panel. 2. Open Printers and Faxes.170 Network Servers: Files, the Web, and Printers 3. Select the icon for the printer you want to share. 4. Click Share This Printer in the Printers task pane. The printers prop- erty sheet opens, typically with the Sharing tab selected. 5. Click the Share This Printer radio button (Figure 8-8) 6. Click the OK button, and you re finished. Figure 8-8: Sharing a specific printerMac OS X If you are sharing a workstation-attached printer running Mac OS X with other Mac OS X or Windows machines, you can perform the configuration using the Mac OS X GUI. As you might expect, things become a bit more complicated when you want Linux computers to share the printer. It is quite simple to enable the sharing of printers from a single workstation ...