Information Technology Reference
In-Depth Information
The access-list numbers range from 1000 to 1099. The network number is a valid 32-bit IPX
network number. A network number of -1 indicates any network. The service-type is a valid
16-bit SAP number. The access list can be applied as an output-sap-filter or input-sap-filter .
Example 12-11 shows an example of a SAP access list. An input SAP filter is configured on
Ethernet 0 by using access list 1000.
Example 12-11 SAP Access List
interface ethernet 0
ipx network 8CAF3C00
ipx input-sap-filter 1000
!
access-list 1000 permit 8CAF3C00.00aa.0056.3527 3FC
access-list 1000 permit -1 4
access-list 1000 permit -1 47 PRINTSVER
access-list 1000 deny -1
Windows NT
Although newer implementations of NT (2000) implement TCP/IP protocols and move away
from WINS and NetBIOS, the CCIE candidate must still have knowledge of the legacy
protocols in NT.
Windows NT organizes clients and servers into NT domains. Each domain has a Primary
Domain Controller (PDC) and one or more Backup Domain Controllers (BDC). Resources are
given names that clients use to reach them. The four methods for a device to resolve friendly
device names to IP addresses follow:
LMHOSTS configuration file
NetBIOS broadcast
NetBIOS local cache
Windows Internet Naming Service (WINS)
The LMHOSTS file is statically configured on the local computer.
NetBIOS
NT uses the session layer NetBIOS protocol for file and print sharing, messaging, and name
resolution. By default, Windows computers send NAME_QUERY broadcasts to all devices on
a segment. The device with the NetBIOS name that is being requested responds with its IP
address. This produces broadcast traffic on the network. The device might also keep a table of
NetBIOS names and corresponding IP addressing in its local cache.
NetBIOS runs over NetBIOS Extended User Interface (NetBEUI). With this method, the
broadcasts are not routable and are only bridged. NetBIOS can also run over IPX; in NT
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