CHapTER 25 Configuring Windows Networking
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(preshared key authentication) modes of operation for WPA2 and can connect to ad hoc wireless networks protected by WPA2 .
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Integration with NAP WPA2-Enterprise, WPA-Enterprise, and dynamic WEP connections that use 802 .1X authentication can use the NAP platform to prevent wireless clients that do not comply with system health requirements from gaining unlimited access to a private network .
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In addition, troubleshooting wireless connection problems is now easier because wireless connections do the following:
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Support the Network Diagnostics Framework, which attempts to diagnose and fix common problems Record detailed information in the event log if a wireless connection attempt fails Prompt the user to send diagnostic information to Microsoft for analysis and improvement
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For more information about troubleshooting wireless networks, see 31 . For more information about configuring wireless networks, see the section titled How to Configure Wireless Settings later in this chapter .
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Windows Vista and Windows 7 also include improved APIs that will enable more powerful networked applications . Systems administrators will not realize immediate benefits from these improved APIs; however, developers can use these APIs to create applications that are more robust when running on Windows Vista and Windows 7 . This enables developers to create applications faster and to add more powerful features to those applications .
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More applications are connecting to the Internet to look for updates, download real-time information, and facilitate collaboration between users . However, creating applications that can adapt to changing network conditions has been difficult for developers . Network Awareness enables applications to sense changes to the network to which the computer is connected, such as closing a mobile PC at work and then opening it at a coffee shop wireless hotspot . This enables Windows Vista and Windows 7 to alert applications of network changes . The application can then behave differently, providing a seamless experience . For example, Windows Firewall with Advanced Security can take advantage of Network Awareness to automatically allow incoming traffic from network management tools when the computer is on the corporate network but block the same traffic when the computer is on a home network or wireless hotspot . Network Awareness can therefore provide flexibility on your internal network without sacrificing security when mobile users travel .
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Improved APIs CHapTER 25
Applications can also take advantage of Network Awareness . For example, if a user disconnects from a corporate internal network and then connects to his or her home network, an application could adjust security settings and request that the user establish a VPN connection to maintain connectivity to an intranet server . New applications can go offline or online automatically as mobile users move between environments . In addition, software vendors can integrate their software into the network logon process more easily because Windows Vista and Windows 7 enable access providers to add custom connections for use during logon . Network Awareness benefits only applications that take advantage of the new API and does not require any management or configuration . For Network Awareness to function, the Network Location Awareness and Network List Service services must be running .
Improved peer Networking
Windows Peer-to-Peer Networking, originally introduced with the Advanced Networking Pack for Windows XP and later included in Windows XP SP2, is an operating system platform and API in Windows Vista and Windows 7 that allow the development of peer-to-peer (P2P) applications that do not require a server . Windows Vista and Windows 7 include the following enhancements to Windows Peer-to-Peer Networking:
New, easy-to-use API APIs to access Windows Peer-to-Peer Networking capabilities such as name resolution, group creation, and security have been highly simplified in Windows Vista and Windows 7, making it easier for developers to create P2P applications . New version of PNRP Peer Name Resolution Protocol (PNRP) is a name resolution protocol, like DNS, that functions without a server . PNRP uniquely identifies computers within a peer cloud . Windows Vista and Windows 7 include a new version of PNRP (PNRP v2) that is more scalable and uses less network bandwidth . For PNRP v2 in Windows Vista and Windows 7, Windows Peer-to-Peer Networking applications can access PNRP name publication and resolution functions through a simplified PNRP API that supports the standard name resolution methods used by applications . For IPv6 addresses, applications can use the getaddrinfo() function to resolve the fully qualified domain name (FQDN) name .prnp .net, in which name is the peer name being resolved . The pnrp.net domain is a reserved domain for PNRP name resolution . The PNRP v2 protocol is incompatible with the PNRP protocol used by computers running Windows XP . Microsoft is investigating the development and release of an update to the Windows Peer-to-Peer Networking features in Windows XP to support PNRP v2 . People Near Me People Near Me is a new capability of Windows Peer-to-Peer Networking that allows users to dynamically discover other users on the local subnet and their registered People Near Me capable applications, as well as to invite users into a collaboration activity easily . The invitation and its acceptance start an application on the invited user s computer, and the two applications can begin participating in a collaboration activity such as chatting, photo sharing, or game playing .