Jan 212009
 

Starting Windows Vista, Windows Server 2008 and Windows 7, to prevent address scans of IPv6 addresses based on the known company IDs of network adapter manufacturers, Windows by default generate random interface IDs for non-temporary autoconfigured IPv6 addresses, including public and link-local addresses. A public IPv6 address is a global address that is registered in DNS and is typically used by server applications for incoming connections, such as a Web server.

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Dec 222008
 

If you are a UNIX/Linux system admin or a developer who  constantly works on Linux/Unix systems , then propably be interested in Xming. Xming is a fully featured free unlimited X Window Server for Microsoft Windows (XP/2003/Vista).Because it is standalone native Microsoft Windows, easily transported portable as a Pocket PC X server. Xming can be used secure with SSH optionally includes an enhanced PuTTY Link SSH client and a portable PuTTY replacement package. Xming can work completely independent of the Window's registry when used with Xming-portablePuTTY.

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Nov 042008
 

Windows Server 2008/2003, Windows Vista, Windows XP and Windows 2000 by default will respond to ARP requests only if the Ethernet address in an ARP request is unicast. The system will not respond if the incoming ARP request did not have a unicast source ethernet address.
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Oct 282008
 

By default IPv4 packets are encapsulated on Ethernet  subnets in Ethernet II or Ethernet DIX format in Windows server 2008/2003, Windows Vista/XP/2000. However, if you need to use IEEE 802.3 SNAP (Sub-Network Acces Protocol) then this can be done from Windows Registry.

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Oct 152008
 

TCP protocol can offload some of the tasks that are being processed by the system processor like Checksum calculation on header and data or IPSec Tunnel Encryptio (if supported by the NIC) onto the Network Interface Card (NIC). Task offloading is designed to improve performance and it is seen to have indeed significantly improve performance.

Windows Server 2008/2003, Windows Vista/XP by defines enables support Task Offloading. However, there may be instance where you need to troubleshoot network performance issues and need to disable the Task offloading. This can be done from the Windows Registry

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