Microsoft Windows NT 4.0 Guide Manual de usuario descargar pdf (Pagina 110)

Microsoft

Windows Server

™

2003 White Paper

Windows NT 4.0 Server Upgrade Guide 105

TCP/IP and Support for Earlier Networking Protocols

Today, TCP/IP is the dominant networking protocol suite in enterprise networks and across the

Internet. When Windows NT 4.0 was first made available, this was not the case. This section

describes the networking protocols no longer supported in Windows Server 2003 so that you can

identify areas where you may encounter difficulty because of features that are no longer

supported.

Before the global growth and popularity of the Internet, various networking protocols were used in

networked environments, and the choice of protocol was often based on the size of the network or

the expertise of the IT networking staff. With today's global Internet, linking even the smallest

networks to the rest of the world, networking protocol expertise in TCP/IP is essential for

networking professionals. TCP/IP is the networking protocol of choice. As a result, many other

networking protocols have become obsolete.

With so many applications supporting TCP/IP, the protocols outlined in this section should present

little difficulty for most applications and systems when upgrading. This information was compiled

from various sources, including Microsoft Knowledge Base articles.

NetBEUI

Microsoft has removed support for the NetBIOS Extended User Interface (NetBEUI) network

protocol in Windows Server 2003. However, some NetBIOS calls remain to assist with application

compatibility. These interfaces are no longer tested and Microsoft cannot guarantee the level of

functionality. It is recommended that you change your application’s NetBEUI-specific calls to

corresponding NetBIOS calls and run it over another network protocol, such as TCP/IP or IPX.

Data Link Control (DLC)

Support for the Data Link Control (DLC) protocol has been discontinued in Windows Server 2003

and is not available to install.

The DLC protocol is primarily used for connectivity in IBM SNA environments for mainframes and

minicomputers such as the AS/400. The DLC interface is most commonly used by 3270 terminal

emulators to communicate with IBM mainframes. The functions that are performed by this

protocol include error detection (by using a check character), error correction (by using time-outs

and retransmissions), flow control (by using delayed acknowledgments and "receiver not ready"

response frames), and the ability to have multiple devices on the same media (by using polling

and acknowledgments).

DLC drivers that are available for Windows XP may also run on Windows Server 2003. A DLC

driver for Microsoft Windows XP is available in Host Integration Server 2000. For more

information, visit http://www.microsoft.com/hiserver. A Windows XP version of the DLC protocol is

available as a free download from the Microsoft Download Center at

http://www.microsoft.com/downloads

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Microsoft Windows NT 4.0 Guide Manual de usuario Pagina 110