Network Security
In order to provide better security when transferring data over a network, Windows Vista provides enhancements to the cryptographic algorithms used to obfuscate data. Support for 256-bit, 384-bit and 512-bit Elliptic curve Diffie–Hellman (ECDH) algorithms, as well as for 128-bit, 192-bit and 256-bit Advanced Encryption Standard (AES) is included in the network stack itself. Direct support for SSL connections in new Winsock API allows socket applications to directly control security of their traffic over a network (such as providing security policy and requirements for traffic, querying security settings) rather than having to add extra code to support a secure connection. Computers running Windows Vista can be a part of logically isolated networks within an Active Directory domain. Only the computers which are in the same logical network partition will be able to access the resources in the domain. Even though other systems may be physically on the same network, unless they are in the same logical partition, they won't be able to access partitioned resources. A system may be part of multiple network partitions.
Windows Vista also includes an Extensible Authentication Protocol Host (EAPHost) framework that provides extensibility for authentication methods for commonly used protected network access technologies such as 802.1X and PPP. It allows networking vendors to develop and easily install new authentication methods known as EAP methods.
A planned feature in the new TCP/IP suite known as "Routing Compartments", utilized a per-user routing table, thus compartmentalizing the network according to the user's needs, so that data from one segment would not go into another. This feature however was removed before the release of Windows Vista, and is slated to be included possibly in a future release of Windows.
Read more about this topic: Windows Vista Networking Technologies
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