- Installing Network Components Using Control Panel Applets
When you install network components and configure network settings, new entries are
added into the system registry. Before we open the registry editor and start exploring
these entries, let's discuss an easy method of installing network components and
specifying their settings.
In Windows NT 4.0, you use the Network applet on the Control Panel.
In Windows 2000, by combining their functionality, the Network and Dial-up
Connections Control Panel applet has replaced two independent Windows NT 4.0
administrative tools: the Network applet and the Dial-up Connections applet. In Windows
XP and Windows Server 2003, this situation has not changed significantly. To start
configuring network connections, start the Network Connections applet on the Control
Panel to open the Network Connections window. Provided that you have installed the
network adapter, and the system has correctly detected it, the Network Connections
window will look as shown in Fig. 8.1.
Figure 8.1: The Network Connections window
Note Certain conditions, such as a malfunctioning network adapter card, can keep your
LAN connection from appearing in the Network Connections folder.
Notice that the appearance of the Local Area Connection icon in this window changes
according to the status of the connection. By design, if your computer doesn't detect a
network adapter, a local area connection icon does not appear in the Network
- Connections folder. Possible states of your LAN connections and their respective icons
are summarized in Table 8.1.
Table 8.1: Local Area Connection Icons
Network adapter has been correctly installed and detected by your computer. You
are connected to the LAN (the LAN connection is active).
Network adapter is physically present, but the cable is unplugged from your
The cable is unplugged from your computer, or from the hub. This icon appears at
the taskbar at the same time as the previous one.
Local Area Connection Network adapter is present, but the driver is disabled.
None The network adapter was not detected.
To view or modify network settings, right-click the Local Area Connection and select
Properties. The Local Area Connection Properties will open (Fig. 8.2).
Figure 8.2: The Local Area Connection Properties window
- The Connect using field at the top of the window specifies the network adapter used for
local area connections. You can configure network adapters by clicking the Configure
button below the field. Notice that this method only configures network adapters that
you've already installed. If you need to install a new network adapter, use Add Hardware
on the Control Panel. The dialog that appears when you click the Configure button is the
same as the network adapter properties window that opens when you use the Device
Manager (Fig. 8.3). This window only allows you to configure network adapter
properties (if the driver has already been installed).
Figure 8.3: The network adapter properties window
The This connection uses the following items list contains network services and
protocols used by the adapter. The Install, Uninstall, and Properties buttons allow you
to install, delete, or configure network protocols and services.
The Show icon in taskbar when connected checkbox at the bottom of the Local Area
Connection Properties window (Fig. 8.2) allows you to specify a mode in which you
can view the local area connection status using the taskbar indicator (Fig. 8.4).
- Figure 8.4: The taskbar indicator displays the local area connection status
As I already mentioned, the Network and Dial-up Connections applet (Windows 2000)
and Network Connections applet (Windows XP and Windows Server 2003) combine the
functionality of two Windows NT 4.0 Control Panel applets. This change reflects the fact
that certain components of the network subsystem, such as Remote Access Service
(RAS) and Dial-Up Networking (DUN) have undergone modifications. The
improvements are listed below.
The Remote Access Service (RAS) is now closely integrated with other
components of the network subsystem. Thus, this service is easier to use. In
contrast to the method used in Windows NT 4.0 where RAS management involved
using a separate utility, both local and remote network connections in Windows
2000, Windows XP, and Windows Server 2003 are managed using the same utility
(Network and Dial-up Connections in Windows 2000, Network Connections in
Windows XP/Windows Server 2003). This enhancement simplifies the tasks for
both system administrators and end users.
The procedure for establishing and managing network connections is now much
easier. Windows 2000 has introduced a special wizard for this purpose. Windows
XP and Windows Server 2003 continue this tradition. This program contains a
large list of configuration options displaying a series of dialogs that show available
options and step-by-step instructions for configuring connections. The New
Connection Wizard is capable of establishing and configuring various types of
network connections (Fig. 8.5), including VPN (Virtual Private Network)
connections, Internet connections, corporate network connections, and connections
with the RAS server.
- Figure 8.5: The Network Connection Wizard is capable of establishing various
New networking functions implemented in Windows 2000, Windows XP, and
Windows Server 2003 include network connection sharing. A user can now
establish a remote connection (for example, an Internet connection), and then
allow other users to connect to the Internet using this connection. This is
convenient for small networks (especially home networks). Although this
functionality allows you to share a connection with any remote network, it's most
frequently used for sharing Internet connections.
Windows 2000/XP and Windows Server 2003 provide support for Virtual Private
Networks (VPN). In addition to the PPTP protocol for accessing virtual private
networks (also supported in Windows NT 4.0), Windows 2000/XP and Windows
Server 2003 support various new VPN technologies, including Layer 2 Tunneling
Protocol (L2TP) and IP Security (IPSec). IPSec is an open standard using Level 3
Stability of RRAS (Routing and Remote Access) is increased. Windows 2000,
Windows XP and Windows Server 2003 also combine RAS and RRAS features.
In comparison to Windows NT 4.0, Windows 2000, Windows XP, and Windows
Server 2003 provide an extended set of functions for customizing dial-up
As compared to Windows 2000, Windows XP and Windows Server 2003 also introduce
several improvements and new features, among which the most important are:
Institute of Electrical and Electronics Engineers (IEEE) 802.1D Transparent
Bridge-this feature enables you to add multiple network segments (usually, of
different media types) and have a single IP subnet.
DNS resolver-provides name resolution for the local network.
- Discovery and Control-allows network clients to find the Internet Connection
Sharing host, know its status, and control its Internet connection.
Personal Firewall-provides basic Internet security for the computer, or when used
in conjunction with ICS, for home or small office networks. To enable or disable
Internet Connection Firewall for a specific connection, open the Network
Connections window (see Fig. 8.1), right-click the connection that you want to
protect, select the Properties command from the right-click menu, and go to the
Advanced tab (Fig. 8.6). Set the Protect my computer and network by limiting
or preventing access to this computer from the Internet checkbox. To
configure the Internet Connection Firewall, click the Settings button at the bottom
of this window.
Figure 8.6: Enabling Internet Connection Firewall