RPC stands for remote procedure call, a mechanism that allows a client to execute procedures on other systems. The RPC mechanism is often used in a distributed client/server model. The server defines a service as a collection of procedures that may be called by remote clients.

No. DCE and ONC both use the concept of the Remote Procedure Call, but the wire protocols that they use are not compatible. You will need to use either DCE for both client and server, or ONC for both client and server; both products are available for most platforms. It is possible for a single program to use both DCE and ONC. Thus a server could be built to server both DCE and ONC clients, or a gateway could be built to accept one kind of RPC and forward to a server of another kind.

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p02: Add information on IBM enhancements to security server to permit large number of DCE principals to be created.

DCE-RPC is synchronous. The way to make an asynchronous call is to create a thread for each RPC call. You should be able to have dozens, if not hundreds, of threads with no problem. Q 2r-07: How can a server keep track of multiple clients? For example, to know what information has already been provided to a client, and thus vary subsequent responses. The DCE RPC mechanism includes a "context handle" which can be created by a server and returned to a client.

Performance testing at several user organizations has shown that DCE RPC performance is similiar to other RPC implementations when doing the same things. The throughput and response times for a series of remote procedure calls is similiar. The use of features in DCE not present in other implementations may consume additional time and resources. For example, name-based binding may required additional time, depending on the number of directories traversed.

First have you considered the advantages of using all protocol sequences? RPCs work the same either way. DCE's implementation provides the same security and reliability over all communication protocols. In most cases the performance is about the same as well. For some applications and some platforms, there may be reasons to prefer one protocol over another. For instance, if your platform has a poor implementation of UDP, that could be a reason to prefer TCP, or vice-versa.

RPC over HTTPS is a secure protocol for MAPI client (Outlook 2003) access to Exchange 2003 servers. Traffic between Outlook and the Exchange servers currently uses RPC over TCP/IP and is not secured; however, with RPC over HTTPS all traffic between the Outlook client and the Exchange servers is secure and protected by SSL encryption.

Here's an example call of DDR VALIDATOR: Param param = new Param(); param.setValue(".DDR"); param.setPType(Param.list); param.setMult(0, "\"FILE\"","80001"); param.setMult(0, "\"IENS\"", "3,"); param.setMult(0, "\"FIELD\"", ".01"); param.setMult(0, "\"VALUE\"", "G-RESEARCH"); String[] res = null; try { res = wRPCBroker1.call("DDR VALIDATOR",param); } catch (Exception ex) { ex.printStackTrace(); } When the call returns, variable res will contain a multiline result.

Most of the latest Windows operating systems support the Remote Procedure Call (RPC) protocol, which allows a remote program to execute code locally. One of the interfaces to the RPC protocol is the Direct Component Object Model (DCOM), which listens on RPC ports and handles RPC requests. A vulnerability in the DCOM interface with RPC allows an attacker to execute arbitrary code and perform arbitrary actions with System privileges on the target system.

The Java API for XML-Based RPC (JAX-RPC) enables Java technology developers to build Web applications and Web services incorporating XML-based RPC functionality according to the SOAP (Simple Object Access Protocol) 1.1 specification.

Yes, you can, since Perl has access to sockets. An example of the rup program written in Perl can be found in the script ruptime.pl at the scripts archive on ftp.cis.ufl.edu. I warn you, however, that it's not a pretty sight, as it's used nothing from h2ph or c2ph, so everything is utterly hard-wired. Some System V based systems, notably Solaris 2.X, redefined some of the standard socket constants. Since these were constant across all architectures, they were often hardwired into the perl code.

By default the port used for the RPC replication is dynamically set as a secure measure. It may be desirable to set the port however (for the purposes of monitoring data etc.) and this can be enabled by performing the following registry change: Double click the new entry and set to the port you want it to use (make sure its not in use, e.g. 1352) After monitoring is complete be sure to remove this entry to regain the security of dynamic RPC port allocation.

The binding handle is an opaque type and cannot be marshalled as data. A parameter of type handle_t must be the first parameter and will serve to specify the binding of the RPC; an attempt to use a handle_t as other than the first parameter will be flagged as an error by the IDL compiler. To send a handle from one process to another, convert it to a string binding and pass the string as a parameter.

XML-RPC is a protocol that uses XML messages to perform Remote Procedure Calls. Requests are encoded in XML and sent via HTTP POST; XML responses are embedded in the body of the HTTP response. Because XML-RPC is platform independent, diverse applications can communicate with one another. For example, a Java client can speak XML-RPC to a Perl server. To get a quick sense of XML-RPC, here is a sample XML-RPC request to a weather service (with the HTTP Headers omitted): <?xml version="1.