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To configure a dynamically assigned private IP alternate address 1. In Control Panel, select Network and Internet Connections. 2. In the Network and Internet Connections properties sheet, select Network Connections. 3. In Network Connections, right-click Local Area Connections and click Properties. 4. In the Local Area Connection Properties properties sheet, click the General tab. Select Internet Protocol (TCP/IP) and click Properties. 5. On the Alternate Configuration tab of the Internet Protocol Properties page, select Automatic private IP address to specify a dynamically assigned private address as your alternate IP address. 6. Click OK. To configure a static IP alternate address 1. In Control Panel, select Network and Internet Connections. 2. In the Network and Internet Connections sheet, select Network Connections. 3. In Network Connections, right-click Local Area Connections and click Properties. 4. In the Local Area Connection Properties sheet, click the General tab. Select Internet Protocol (TCP/IP) and click Properties. 5. On the Alternate Configuration tab, select User configured for a static address as your alternate IP address. 6. Enter your alternate IP address, alternate subnet mask, and alternate default gateway. 7. Type the preferred and alternate DNS server address for this network. 8. Type the preferred and alternate WINS server address for this network. 9. Click OK.

TCP/IP-based services use IP addresses to identify each other, but users and applications frequently require computer names for host identification. A name resolution mechanism must be available on a TCP/IP network to resolve names to IP addresses. To resolve a name to an IP address, the Windows XP Professional resolver first submits the name query to DNS. If DNS name resolution fails, the resolver checks the length of the name. If it is longer than 15 bytes, resolution fails. If it is not, the resolver then checks to determine whether NetBIOS is running. If it is not running, resolution fails. If it is running, the resolver then tries NetBIOS name resolution. Figure 24-4 illustrates this process. Windows XP Professional provides several types of name resolution, including DNS, WINS, Hosts and Lmhosts files, and broadcast. Generally, a Windows XP Professional based computer uses a combination of name-resolution types, to be chosen by the user.

24:

Once the invitation is accepted, the contact begins seeing your video in the Conversation window, as shown in Figure 8-13 on the next page When you are sending video, you can click the Options button under the video window and choose Show My Video As Picture-in-Picture to see what your outgoing video.

A Query goes to flowchart DNS Name Resolution, Part 1. B Query returns from flowchart DNS Name Resolution, Part 2, if DNS Name Resolution was unsuccessful.

Figure 24-4

Windows XP Professional supports DNS dynamic update. Dynamic update is a standard, specified in RFC 2136, that provides a means of dynamically updating host data in a DNS database. Updates can come from DNS clients and/or DHCP servers. For more information about dynamic update, see Configuring Dynamic Update later in this chapter.

8

Windows XP Professional provides four methods for resolving names to IP addresses:

Domain Name System (DNS), accomplished by querying DNS servers. This is for applications and services that require host-to-IP name resolution. NetBIOS name resolution, accomplished by querying WINS servers. This is included for compatibility reasons for applications and services that require NetBIOS-to-IP name resolution, such as the browsing function of Microsoft Windows NT 4.0, Windows 98, and Windows 95. IP Host and NetBIOS name resolution, accomplished through Hosts files and Lmhosts files, respectively. These provide host name-to-IP and NetBIOS name-to-IP name resolution through manually maintained local files. NetBIOS name resolution, accomplished by means of b-node broadcasts. B-node broadcasts are used for name resolution within the local subnet.

Part IV:

The sample WPF browser you just created was created this way for learning purposes. If you do real development in WPF, you can follow a set of best practices so that you can have your application translated into different languages. Other design principles apply to the best practices, so if you go on to develop applications commercially in WPF, please visit MSDN for all those best practices.

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For Windows XP Professional based clients, you need to determine whether the client needs to be configured to use DNS, WINS, or a combination of the two. In general, DNS is needed under the following circumstances: