|Every now and then we come across terminology
that leaves us scratching our heads as to the meaning of certain acronyms, buzzwords or
new IT terms emanating from our friends at Redmond (or Reading!). With this in mind, we've
put together a glossary of terms for you to use, print off or cut-n-paste to your desktop
which will help you sort out your ASPs (Active Server Pages) from your ASPs (Application
Global Catalog (GC) is a database that contains every object in the Active Directory (AD),
but with a limited number of attributes for each object. Win2K automatically creates a GC
on the first domain controller in the forest. This GC contains a complete replica of all
the AD objects on the host domain and a partial replica of every other domain in the
forest. Users (with the exception of domain administrators) can't log on to the network if
a GC isn't available. A GC provides universal group information to domain controllers at
logon and lets network users locate resources in the AD throughout the forest.
Address Resolution Protocol (ARP) is a TCP/IP utility that ensures the uniqueness of a
clients IP address. A Win2K DHCP-enabled client can automatically self-configure an
IP address when a DHCP server isn't available. But before a client uses the IP address,
the client uses a gratuitous ARP to verify that no other client on the network segment is
using the same address.
Routing Encapsulation (Cisco)
computers Globally Unique Identifier (GUID), a special ID that computer
manufacturers supply, consist of 32 hexadecimal text digits--8 digits followed by 4, 4, 4,
and 12 digits (e.g., hhhhhhhh-hhhh-hhhh-hhhh-hhhhhhhhhhhh, where h is a hexadecimal
digit). Valid entries are limited to 0123456789 abcdef-ABCDEF. You can find a
computers GUID either on the machine's case or in the BIOS. If you're using Windows
2000's (Win2K) Remote Installation Services, you can pre-authorize a computer by using its
GUID. This is a 32 digit number that consists of the computers hardware address
(i.e. MAC address) preceded by 24 zeros (e.g. 00000000000000000000-0060979C6AB9).
Windows 2000 (Win2K) Hardware Compatibility List (HCL) is a list of devices that Win2K
supports. Hardware vendors perform certain tests on their devices to ensure that their
products work reliably with Win2K before submitting the results to Microsoft. Before you
install a device on your Win2K computer, you should ensure that the device is on the HCL.
If you don't see a device on the HCL, don't conclude that the device wont work
reliably with Win2K--it might simply mean that the manufacturer has not designed or tested
the product to meet Microsofts compatibility standards. Nevertheless, it's a good
idea to use only products on the HCL.
Protocol/asynchronous transfer mode (IP/ATM) is a group of services that includes three
main components: an IP/ATM client, an ATM ARP server, and a Multicast Address Resolution
Server (MARS). The IP/ATM client contains the ATM adapter for contacting the MARS server.
The ATM ARP server, which contains a database of IP and ATM addresses of all the clients,
resolves broadcast and multicast IP addresses to ATM addresses. MARS resolves multicast IP
addresses to ATM addresses of those clients that have joined a multicast group. Windows
2000 Server (Win2K Server) includes an ATM ARP/MARS service.