http://www.engr.iupui.edu/~skoskie/ECE362/lecture_notes/LNB25_html/text12.html says
There are many serial data transfer protocols. The protocols for serial data transfer can be grouped into two types: synchronous and asynchronous. For synchronous data transfer, both the sender and receiver access the data according to the same clock. Therefore, a special line for the clock signal is required. A master (or one of the senders) should provide the clock signal to all the receivers in the synchronous data transfer.
Does "serial data transfer" mean the same as sequential access, as opposed to random access?
Do both synchronous and asynchronous data transfer imply sequential access, not random access?
Can random access be either synchronous or asynchronous? Same for sequential access?
Thanks.