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Lesson 1: Configuring Local Area Network (LAN) Connections . . . . . . . . . . . 15-3 Lesson 2: Configuring Dial-Up Connections . . . . . . . . . . . . . . . . . . . . . . . . 15-19 Lesson 3: Configuring Wireless Connections . . . . . . . . . . . . . . . . . . . . . . . 15-30 Lesson 4: Configuring Internet Connection Sharing (ICS) . . . . . . . . . . . . . . 15-42 Lesson 5: Configuring Windows Firewall . . . . . . . . . . . . . . . . . . . . . . . . . . 15-46

To complete this chapter, you must have a computer that meets the minimum hardware requirements listed in the preface, About This Book. You must also have installed Microsoft Windows XP Professional on the computer and have a network adapter and modem installed.

If you need disjunction (or), there are two options. The first is to use Restrictions.or() together with Restrictions.and():

15-3

Windows XP Professional makes configuring LAN connections easy. When you install a network adapter, Windows creates a LAN connection automatically; it is just up to you to configure it. This lesson shows you how to view the LAN connections on a computer and how to configure those connections.

session.createCriteria(User.class) .add( Restrictions.or( Restrictions.and( Restrictions.like("firstname", "G%"), Restrictions.like("lastname", "K%") ), Restrictions.in("email", emails) ) );

View LAN connections on a computer running Windows XP Professional. Configure a LAN connection. Troubleshoot a LAN connection. Use the New Connection Wizard to configure a connection.

Windows XP Professional provides a central location for viewing and configuring network connections: the Network Connections window, shown in Figure 15-1. You can open the Network Connections window in several ways, including the following:

The second option is to use Restrictions.disjunction() together with Restrictions.conjunction():

In Control Panel, click Network And Internet Connections, and then click Network Connections. In the Start menu or the desktop (if it is displayed), right-click My Network Places, and then select Properties. Directly from the Start menu if you first configure the Start menu to display the Network Connections folder.

A router is a device that connects one network to another, passing traffic between the two as needed. Enterprise networks can have dozens of routers, and the Internet has thousands. When a user accesses a Web site on the Internet, the traffic might pass through 20 or more routers on its way from the source to the destination. Each one of the routers along the way is referred to as a hop. When a router malfunctions, the computers on each side are isolated from each other. Depending on the design of the networks, the effect of a router failure can be minimal or catastrophic. If the router that connects an enterprise network to the Internet should fail, internal systems are cut off from Internet resources. For a user in the enterprise, this can mean an annoying delay in accessing a Web site, but for a company, this can also mean that customers on the Internet are unable to place orders, which makes it a much more critical failing.

The icons that are used for each connection provide visual clues for the type and status of the connection. These visual clues include the following:

session.createCriteria(User.class) .add( Restrictions.disjunction() .add( Restrictions.conjunction() .add( Restrictions.like("firstname", "G%") ) .add( Restrictions.like("lastname", "K%") ) ) .add( Restrictions.in("email", emails) ) );

Dial-up connections (such as the Contoso.com connection in Figure 15-1) have a small picture of a phone and modem. LAN or high-speed Internet connections (such as the Local Area Connection in Figure 15-1) have a small picture meant to represent a network cable connection. Disabled or disconnected connections (such as the Contoso.com connection in Figure 15-1) are dimmed to show that they are disabled or disconnected. Connections that are protected with Windows Firewall have a small picture of a lock (such as the Contoso.com connection in Figure 15-1). You will learn more about Windows Firewall in Lesson 5, Configuring Windows Firewall.

15-4