Information Technology Reference
In-Depth Information
4. In Group Policy Management Editor (GPME), expand
Computer Configuration
,
Policies
,
Administrative Templates
, and
Network
.
5. Click
Link-Layer Topology Discovery
. In the right pane, enable the
Turn on Mapper I/O
(LLTDIO) driver
and
Turn on Responder (RSPNDR) driver
policies. For both policies, click
to enable the
Allow operation while in domain
option. Close GPME.
6. In GPMC, link
NetworkGPO
to the domain.
7. Open a command prompt window, type
gpupdate
, and press
Enter
. Close the command
prompt window when Gpupdate.exe is finished.
8. Open the Network and Sharing Center, and click
View full map
. After a moment, the net-
work map should be displayed. If your Vista computer isn't displayed in the map, start your
Vista computer and log on to the domain as Administrator, if necessary. Run
gpupdate
on
your Vista computer, and then close the command prompt window. Refresh the network
map on your server by clicking the Network Map window and pressing
F5
.
9. Note that enabling the above policies doesn't enable network discovery, only the network
map feature. Close all open windows, and stay logged on to your server.
Currently, there's no group policy setting to enable network discovery on
computers. However, you can create a script that runs at computer startup
or user logon with this command: netsh advfirewall firewall set rule
group="network discovery" new enable=yes.
8
TCP/IP is the default network protocol installed on Windows computers. Beginning with
Windows Server 2008 and Vista, two versions are installed: TCP/IPv4 and TCP/IPv6. This sec-
tion discusses TCP/IPv4, as it's still the dominant protocol used in today's networks. TCP/IPv6
is covered later in this chapter. The differences between TCP/IPv4 and TCP/IPv6 are limited to
the IP part of the protocol. Therefore, the discussion of TCP/IP in general applies to both ver-
sions; only when IP is covered is the discussion specific to version 4 or 6.
TCP/IP is a suite of protocols, so when it's installed on a computer, a number of protocols,
services, and programs are usually installed with it. Some are listed here with a brief description:
•
Domain Name System (DNS)
—DNS resolves domain names to addresses. When a network
resource is requested by its name, such as \\serverXX\Shared or
http://www.microsoft.com,
DNS client software queries a DNS server to resolve the name of the server hosting the
resource to its IP address. Windows computers running TCP/IP have the DNS client pro-
tocol installed automatically, and a DNS server can be added as a server role in Windows
Server 2008 (discussed in Chapter 9). A DNS server is required to run a Windows Server
2008 domain. By default, the DNS client protocol is installed on each computer that
installs the TCP/IP suite. The DNS server role can be installed on a Windows Server 2008
server.
•
Dynamic Host Configuration Protocol (DHCP)
—DHCP provides automatic IP address
configuration. By default, Windows computers are configured to request their IP address
configuration from a DHCP server. The client portion of DHCP is installed by default on
all computers that install TCP/IP. The DHCP server role can be installed in Windows
Server 2008.
•
Transmission Control Protocol (TCP)
—The component of the TCP/IP suite that provides
reliable data transfer between computers. TCP handles flow control, packet sequencing,
and data acknowledgements to help ensure that data transfers are completed without
error. TCP is used by applications that require reliable transfer of large amounts of data.
•
User Datagram Protocol (UDP)
—A lightweight protocol that performs some functions of
TCP but is used by applications that usually transfer a small amount of data and, there-
fore, don't require the reliability features of TCP.
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