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There are several command-line utilities that can be used to test a network installation The more useful of these commands are the following: Ipconfig Used to determine if a network configuration has been initialized and an IP address assigned If an IP address and valid subnet mask are returned, then the configuration is initialized and there are no duplicates for the IP address If a subnet mask of 0000 is returned, then the IP address is a duplicate Hostname Used to determine the computer name of the local computer Ping Used to query either the local computer or another computer on the network to see whether they respond If the local computer responds, you
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Microsoft Windows Server 2008: A Beginner s Guide
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know that TCP/IP is bound to the local network adapter and that both are operating correctly If the other computer responds, you know that TCP/IP and the network adapters in both computers are operating correctly and that the connection between the computers is operable Use the following steps to test a network setup with these utilities Figure 6-4 shows the results on my system 1 Click Start and click Command Prompt on the top left of the menu The Command Prompt window opens
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Figure 6-4 Testing a network with TCP/IP utilities
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2 Type ipconfig and press enter The IP address (both IPv4 and IPv6) and subnet mask of the current computer should be returned If this did not happen, there is a problem with the current configuration TIP If you type ipconfig at the command prompt, you will open Help for ipconfig and be able to see all the options that are available for this powerful command 3 Type hostname and press enter The computer name of the local computer should be returned 4 Type ping computer name and press enter, where computer name is the name of another computer on your network You should get four replies from the other computer 5 If Ping did not work with a remote computer, try it on the current computer by typing ping 127001 and pressing enter Again, you should get four replies, this time from the current computer If you didn t get a reply here, then you have a problem with either the network setup or the network adapter If you did get a reply here, but not in Step 4, then there is a problem either in the other computer or in the line connecting them 6 When you are ready, type Exit and press enter to close the Command Prompt window NOTE The 127001 IP address is a special address set aside to refer to the computer on which it is entered, also called localhost If you do find a problem here, use the steps in Check and Change Protocols earlier to isolate and fix the problem
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To set up Windows Server 2008 to support the rest of the network, the following services and facilities must be installed and configured: Dynamic Host Configuration Protocol (DHCP) Domain Name System (DNS) User accounts and group permissions Domains and Active Directory
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In the process of determining the best settings for all of these elements, you ll also explore the elements themselves in greater depth While it is not needed for Windows
Microsoft Windows Server 2008: A Beginner s Guide
Server 2008, Windows Server 2003, Windows Vista, or Windows XP, you may want to install Windows Internet Name Service (WINS) for connectivity to older Windows systems, so it will also be discussed Domains and Active Directory are the subject of 7, but the remaining elements are discussed here
Network Addressing
For networking to function, one computer must know how to address another To do this, every computer has at least two, and probably three, addresses: Physical address Address that the manufacturer builds onto each network device or network adapter (also called the hardware address) In Ethernet cards, this is the media access control (MAC) address Logical address Address assigned to a computer by a network administrator or a server and ultimately by an addressing authority In TCP/IP, the IP address is the logical address and the Internet Assigned Numbers Authority (IANA) is the addressing authority that assigns a block of addresses, distributed as needed by a server or, less frequently, by an administrator While the IANA is the ultimate naming authority, most companies and individuals get their IP address(es) from their Internet service provider (ISP) Computer name Address used in most applications and in Windows Network In earlier Microsoft Windows networking, this is the NetBIOS name In TCP/IP, this can be a two-part name The first and required part is for the current computer and is the host name; an example is server The second part is the domain name for the domain that contains the computer; for example, matthewscom, making the complete name servermatthewscom
These three addresses operate at different layers of the OSI networking model (see the 5 section The OSI Model ), as shown in Figure 6-5 The physical address operates at the Physical and Data Link layers, the logical address operates at the Network layer, and the computer name is used above the Network layer For all three of these addresses to work together, there must be a method of converting one to another Given a computer name, it must be resolved to a logical address, and the logical address must be resolved to a physical address The task of resolving a computer name into a logical address is the job of DNS or WINS, and resolving a logical address into a physical one is done by the networking protocol (for example, in TCP/IP, this is the Address Resolution Protocol, or ARP) In addition, with an ever-shorter supply of IP addresses, these addresses generally are distributed as needed by a server using DHCP Choosing and setting up a networking protocol, as well as setting up DNS and DHCP, are major topics in this chapter, so the many tasks surrounding addressing are a connecting thread throughout the chapter
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