winsock2

Ответ от =Serge=[гуру]
Here is a list of the new features that WinSock 2 provides:
1.Multiple Protocol support: WOSA architecture let's service providers "plug-in" and "pile-on"
2.Transport Protocol Independence: Choose protocol by the services they provide
3.Multiple Namespaces: Select the protocol you want to resolve hostnames, or locate services
4.Scatter and Gather: Receive and send, to and from multiple buffers
5.Overlapped I/O and Event Objects: Utilize Win32 paradigms for enhanced throughput
6.Quality of Service: Negotiate and keep track of bandwidth per socket
7.Multipoint and Multicast: Protocol independent APIs and protocol specific APIs
8.Conditional Acceptance: Ability to reject or defer a connect request before it occurs
9.Connect and Disconnect data: For transport protocols that support it (NOTE: TCP/IP does not)
10.Socket Sharing: Two or more processes can share a socket handle
11.Vendor IDs and a mechanism for vendor extensions: Vendor specific APIs can be added
12.Layered Service Providers: The ability to add services to existing transport providers
In a nutshell, WinSock 2 is WinSock 1.1 on steroids, it's a superset of 1.1's APIs and architecture In addition to its new features, it also clarifies existing ambiguities in the 1.1 WinSock specification and adds new extensions that take advantage of operating system features and enhance application performance and efficiency. Finally, WinSock 2 includes a number of new protocol-specific extensions. These extensions--such as multicast socket options--are relegated to a separate annex, since the main WinSock 2 protocol specification is protocol-independent.
Источник: