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The NetWare Core Protocol (NCP) is a network protocol used in some products from Novell, Inc. It is usually associated with the client-server operating system Novell NetWare which supported primarily MS-DOS client stations, but more recently a support of other platforms such as Microsoft Windows, Mac OS, Linux, Windows NT and various flavors of Unix was added. The NCP is used to access file, print, directory, clock synchronization, messaging, remote command execution and other network service functions. It originally took advantage of an easy network configuration and a little memory footprint of the IPX/SPX protocol stack. Since mid-1990s the TCP/IP implementation is available. Novell eDirectory uses NCP for synchronizing data changes between the servers in a directory service tree. == Technical Information == The original IPX/SPX implementation was provided only for Novell NetWare platform and now is obsolete. The TCP/IP implementation uses TCP/UDP port 524 and relies on SLP for name resolution. For NCP operation in IPX/SPX networks the bare IPX protocol was used with Packet Type field set to 17. On the workstation (client station) side the IPX socket number of 0x4003 was used, on the server side the socket number of 0x0451. The NCP PDU has the following structure: The NCP Type field determines the type of operation: Individual requests are identified by the Sequence Number (modulo 256). The Connection Number identifies an individual client station connection on the server. Novell Netware servers of version up to 2.x supported up to 255 connections and the Connection Number occupied only 1 octet. Later it was extended to 2 octets. Task number has value 3 in requests and 1 in replies. The Data field starts with NCP Function number octet which distinguishes individual services. The contents and the length of the rest of the Data field depends on the NCP Function. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「NetWare Core Protocol」の詳細全文を読む スポンサード リンク
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