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Tools options on a typical Windows XP workstation These should be familiar to you Figure 1837 shows Administrative Tools the many extra tools you need to Windows 2000 and Windows XP come with a set of utilities called work with Windows 2000 Server Administrative Tools, as you know from previous chapters Refer to Every Windows system con 12 and answer these questions tains a special account called the 1 How do you access Administrative Tools administrator account This one account has complete and abso2 Which tool or tools might be useful for working with networks lute power over the entire system 3 More specifically, which tool would help you analyze network When you install Windows 2000 performance or XP, you must create a password for the administrator account Anyone who knows the administrator password has the ability to install/delete any program, read/change/delete any file, run any program, and change any system setting As you might imagine, you should protect the administrator password carefully Without it, you cannot create additional accounts (including additional accounts with administrative privileges) or change system settings If you lose the administrator password (and no other account with administrative privileges exists), you have to reinstall Windows completely to create a new administrator account so don t lose it! In Windows 2000, open the Properties window for My Computer, and select the Network Identification tab, as shown in Figure 1838 This shows your current selection Windows XP calls the tab Computer Name and renames a few of the buttons (Figure 1839) Clicking the Network ID button opens the Network Identification Wizard, but most techs just use the Change button (Figure 1840) Clicking the Change button does the same
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Figure 1837
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Figure 1839 Figure 1838
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thing as clicking the Network ID button, but the wizard does a lot of explaining that you don t need if you know what you want to do Make sure you have a valid domain account or you won t be able to log in to a domain At this point, you ve prepared the OS to network in general, but now you need to talk to the specific hardware For that, you need to load protocols
Protocols
Simply moving data from one machine to another is hardly sufficient to make a complete network; many other functions need to be handled For example, if a file is being copied from one machine to another, something must keep track of all the packets so that the file can be properly reassembled If many machines are talking to the same machine at once, that machine must somehow keep track of which packets it sends to or receives from each of the other PCs Another issue arises if one of the machines in the network has its network card replaced Up to this point, the only way to distinguish one machine from another was by the MAC address on the network card To solve this, each machine must have a name, an identifier for the network, which is above the MAC address Each machine, or at least one of them, needs to keep a list of all the MAC addresses on the network and the names of the machines, so that packets and names can be correlated That way, if a PC s network card is replaced, the network, after some special queries, can update the list to associate the name of the PC with its new network card s MAC address
Figure 1840
Using the Change button
18: Understanding Networking
Network protocol software takes the incoming data received by the network card, keeps it organized, sends it to the application that needs it, and then takes outgoing data from the application and hands it to the NIC to be sent out over the network All networks use some protocol Although many different protocols exist, three dominate the world of PCs NetBEUI from Microsoft, IPX/SPX from Novell, and TCP/IP from UNIX/Internet
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