RFC, ALE & Data Distribution

What characterizes synchronous RFC (sRFC) regarding availability and waiting?

What does queued RFC (qRFC) add over tRFC?

How do inbound vs outbound RFC connections use the gateway?

What do RFC destination connection types 3, T, R, L, G, and H mean?

What does the SM59 Connection Test actually verify, and what does it NOT verify?

What authorization objects and transaction set up a trusted RFC connection?

Why should RFC quotas be set, and which parameter activates them?

What does Transaction SARFC analyze, and what's the caveat about RZ12 changes?

What does Transaction SM58 list, and what can you do with the entries?

What do qRFC queue statuses SYSLOAD, CPICERR/ARETRY, and ANORETRY/SYSFAIL mean?

Where is the QIN (inbound) scheduler configured, and what must its destination be?

How is bgRFC configured, and what's the supervisor destination?

What does the bgRFC Scheduler Count control, and what do -1 and 0 mean?

How does ALE couple systems, and what carries the data?

What are the three components of an IDoc?

What does the ALE distribution model specify, and where is it maintained?

What does ALE auditing (message type ALEAUD) provide, and what does it require?

What is the SAP S/4HANA migration cockpit for, and how does it transfer data?

How does direct input (BMV0) differ from batch input, and what's the trade-off?

How does transactional RFC (tRFC) let the remote system be unavailable, and what's its ordering limitation?

What is bgRFC, and who decides the RFC variant?

Where are RFC connections configured, and what goes in Technical Settings vs Logon & Security?

In async communication, what's the difference between the push and pull principles, and what are the three methods?

How does the QOUT scheduler process outbound queue entries, and how can processing be redirected?

What does the local data queue (LDQ) do, and where is it monitored?

How does qRFC move data from sender to receiver, and which schedulers are involved?

What are the basis administrator's ALE setup tasks?

What do partner profiles define, and what trade-off does the output mode control?

What's the difference between BD87, BD73, and WE05 for IDoc processing?

Why isn't the gateway in the work-process list, even though it runs in every dialog instance?

Why is asynchronous RFC (aRFC) preferred over synchronous RFC?

What does the Authorization for Destination field on an RFC connection add?

What do trusted RFC connections avoid transmitting, and what's their directionality?

What are RFC server groups for, and what can't they be used for?

Which transactions administer qRFC outbound vs inbound queues?

How does bgRFC improve on qRFC in dependency handling and scheduling?

What does Application Link Enabling (ALE) do, and how does it differ from EDI?

What status values does an IDoc pass through from sender to receiver?

How does batch input transfer data, and why is consistency guaranteed?

What does LSMW do, and what's the recommended migration tool now?