The DHCP server in Windows Server 2008 R2 (download) has invested in the areas of security, reliability, manageability and usability. Similarly on the DHCP Client in Windows 7 has invested on certain optimization for obtaining IP Address.
The DHCP client of Windows 7 has support for optimization to obtain IP Address using SSID caching: ·Supports SSID caching so that, laptop devices with Windows 7 could get IP Address in a lesser time in a Wireless LAN network during revisits to the same. ·Extended NDF and unified tracing to support additional scenario.[…]