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270 Chapter 8: AppleTalk
require SPX keepalive packets. The routers can be configured to respond to keepalive packets
with the command ipx spx-spoof.
IPX/IP Gateways
When you connect IPX clients to the Internet, you must install a TCP/IP gateway at a central
location.
The IpeXchange IPX-to-IP gateway product requires only one IP address for all IPX clients in
the network. The Cisco IpeXchange Internet gateway can be installed on a client or a server.
The client runs on a typical Windows PC, and the server version can be loaded on a NetWare
server.
Windows Networking
Windows Networking can be the most challenging of all for the CCDP. Windows relies heavily
on the NetBIOS protocol. In addition to putting lots of broadcast traffic on the network,
NetBIOS cannot be routed. In its native state, NetBIOS can be only bridged. Therefore, the
CCDP must be familiar with Windows Networking techniques that allow NetBIOS to be
encapsulated and passed across a routed network. In addition, Windows Networking uses the
concepts of domains and workgroups, which you must understand if you are to successfully
incorporate the Microsoft Network into your design. When this book refers to Windows
Networking, it is referring to the networking system shared by the following Microsoft
operating systems:
·
Microsoft LAN Manager
·
MS-DOS with LAN Manager client
·
Windows for Workgroups
·
Windows 95, 98, and Me
·
Windows NT and 2000
Domains and Workgroups
Windows Networking has three concepts of a group of related computers: workgroups,
domains, and a domain hierarchy. Workgroups can be any logical collection of computers; any
computer on the network can join an existing workgroup or create a new one.
Domains are created and managed by a primary domain controller (PDC) process that runs on
a Windows NT or Windows 2000 server. A domain has security and administrative properties
that a workgroup does not. Each domain must have at least one NT or 2000 server that is
responsible for the PDC process, user account information in the domain, and security within
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