Need Info on RPC

[Sanju Kapoor]

I am asking this for a friend of mine who does not have network access. I will
forward all replies to him.

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We have many TCP applications that currently use either sockets or TLI. 
We have machines running SUNOS, AIX, SYSTEM V, HP/UX, DG/UX, UMIPS, 386/ix
SCO UNIX and Xenix, VMS, and OS/2. For future applications we are looking 
into using RPC if possible.

My questions are :

1. What kind of applications/environments are best suited for RPC.

2. What are the limitations/problems of RPC.

3. Why would someone use RPC rather than TLI or sockets. I am interested 
   in the advantages/disadvantages of it.

4. What are the performance related questions regarding RPC.

5. How different are the various RPC mechanisms. (SUN, HP, NetWise, Xerox and 
   OSF). Can I mix RPC from different vendors in my application. 

6. What are the problems of using RPC on different platforms.

Please inform me about it. If there are sufficient replies I will post a summary
of it on the net. Thanks a lot...

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Sanju Kapoor