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In the process of creating a hardware and software inventory, it is important to document the network topology. Doing so helps identify areas of the network that might require alternate software update strategies or special attention to network bandwidth, as might be the case with branch offices. When documenting the topology and usage patterns of a network, start by creating a diagram of the network topology showing the location of each subnet, the speed of network connections, where key servers are located, and any other salient information. SMS and Microsoft Visio provide automated topology diagramming tools that can help with this task, as discussed in the Choosing Inventory Tools section later in this chapter.

Part II:

Next, obtain traffic and usage patterns by using network traffic analysis tools, analyzing performance logs, and interviewing the relevant people about business patterns, such as yearly accounting periods and recurring deadlines.

Remote access can be used to establish connections with both dial-up services that use Point-to-Point Protocol (PPP), a standard protocol for encapsulating network protocols such as TCP/IP over dialup, as well as Windows remote access servers, which also leverage PPP. Creating New Internet Connections, page 103, covers using remote access services to dial up to a standard ISP using PPP. This chapter focuses on using remote access services to connect to remote Windows networks running remote access servers.

When creating a hardware and software inventory, it is important to identify all relevant devices including the following:

Computers that connect to the network via virtual private network (VPN) or remote access server (RAS) connections.

This section examines how to configure some of Windows XP s remote access services. Windows XP does not distinguish between remote access connections to the Internet and to a private network; after all, the connection is much the same. For an Internet connection, you connect to an ISP s dial-up server. For a remote access connection to a private network, you connect to a private remote access server.

Computers in a perimeter network Computers located on a network on the edge of the local network, and (usually) not a member of any domain. Standalone computers Other computers in the organization not joined to any domain. Network devices This includes routers, firewalls, and wireless access points with updatable firmware, and Network-Attached Storage (NAS) devices, which often run Windows Storage Server.

When inventorying computers, collect the following information:

5: Using Rapid Application Development Tools with Visual C# 2008 73

Record the DNS and NetBIOS names of each computer. Record the type of each computer for example, desktop, laptop, or Record what operating system and service

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using the Group Policy setting Computer Configuration\ or User Configuration\Administrative Templates\Network\Offline Files\ Administratively assigned offline files. You can store up to 2 gigabytes (GB) of automatically cached files per computer if that much space is available; for manually cached files, you are limited only by the amount of available disk space on the drive containing the cache. Note

If the network resource is online, renaming files in the Offline Files folder takes effect immediately on the network resource.

Windows XP Professional provides Encrypting File System (EFS) support for Offline Files. The local cache of Offline Files can be encrypted if the cache directory resides on an NTFS volume. When the cache is encrypted, the local copy of a cached file is automatically encrypted. Tip

unusual for a server to function solely as a remote access server to support remote network clients.

To select this option, in the Folder Options dialog box, click the Offline Files tab, and then select the Encrypt Offline files to secure data check box. You must be a member of the Administrators group to perform this function. You can also use Group Policy to apply this option to groups of users. In the Group Policy snap-in, enable the Encrypt the Offline Files cache setting. If the setting is configured by using Group Policy, it cannot be overridden on the Offline Files tab on the local computer.

A network share automatically becomes available after being offline when three conditions are all met:

No offline files from that network share are open on the user s computer. No offline files from that network share contain changes that must be synchronized. The network connection is not a slow link.