Data Communications Networking Devices - 4th Ed.pdf

224 __________________________________________________________ WIDE AREA NETWORKSname server will be reached that has administrative authority over the domaincontaining the host name to resorve and will return an IP address through areversed hierarchy to provide the originating name server with a response to itsquery. Most name servers cache the results of previous name queries which canconsiderably reduce off-domain or Internet DNS queries. In the event that aresponse is not received, possibly due to an incorrect name of the entry of a name nolonger used, the local name server will generate a `failure to resolve' message after aperiod of time that will be displayed on the requesting host's display.TCP/IP con®gurationThe con®guration of a station on a TCP/IP network normally requires thespeci®cation of four IP addresses as well as the station's host and domain names. Toillustrate the con®guration of a TCP/IP station, Figures 2.33 through 2.35 showthe screen settings on a Microsoft Windows NT workstation used to con®gure thestation as a participant on a TCP/IP network.Figure 2.33 illustrates the Windows NT 4.0 Network Protocols tab with TCP/IP Protocol selected. Note that in the Network Protocols box the entry NWLinkIPX/SPX Compatible Transport is shown. Windows NT has the ability tooperate multiple protocol stacks to include NWLink which is Microsoft's implementationof the Novell IPX and SPX protocols. This capability enables you touse a Windows NT computer to access a Novell network.Figure 2.33 Using the Windows NT 4.0 Network protocols tab to select the use of theTCP/IP protocol