DCE

DCE

1. Commercial system with consistent environment for distributed applications

   • DCE (Distributed Compuyting Environment) was developed by OSF (Open Systems Foundation).
     • DCE's goal is to provide a consistent consistent environment as a platform for the development of distributed applications. distributed applications.
       • The basis of DCE was the existing operating systems, initially UNIX and later VMS, WINDOWS and OS/2. UNIX at first, then VMS, WINDOWS and OS/2.

2. DCE has various tools and services, as well as the infrastructure for these to work together infrastructure for these to work in an integrated manner to facilitate distributed applications.

   • DCE creates a potential market by running on different architectures, operating systems and networks. on different architectures, operating systems and networks, in addition to offering transparency to the user
     • Authentication and protection mechanisms integrated in DCE allow this system to provide network security to a workgroup.
       • DCE uses TCP/IP or OSI protocols for network communication.

3. The strucuture is the client - server is the DCE model, since user processes operate as clients to obtain a service from a server process.

   • The distributed services provided by DCE are mainly time, directory, security and file system services.
     • Other DCE features include threads and RPCs (remote procedure calls).

4. In DCE the directory service that names and registers all resources is made up of cells, each with a cell directory service (CDS).

   • Each resource has a name consisting of the name of the cell and its name in the cell. The GDS (Global Directory Service) and DNS (Domain Name System) mechanisms are used by DCE to locate cells.
     • CDS sorts cell names by hierarchy, although it also allows symbolic links. symbolic links.
       • GDS is a secondary service of DCE that allows it to locate remote cells, as well as remote cell remote cells, as well as arbitrary directory information.

5. Security in distributed systems is essential and DCE provides it effectively. Some of the security concepts involved in DCE are:

   • Main: It is a process that requires security in communication. It has a binary number associated with it as a unique user identifier.
   • Authentication: Routine to determine if a principal is really who he/she claims to be, for which DCE is based on the Kerberos system of the MIT (Massachusetts Institute of Technology).
   • Authorization: It is used to determine which resources the principal has access to and an access control list (ACL) is used.
   • Cryptography: Transforms data in such a way that it is impossible to recover the original data without a key.

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