Do you think all vendors will implement a standard in the same manner? Why or why not?

Answer 1

There's two basic cases to consider:

1) Everybody *wants* to implement the standard, but they manage to get it wrong somehow. In one of the more famous examples, the document that defined 100-mbit Ethernet was about 150 *pages* of updates to the old 10-mbit standard. And in one of those pages, one sentence was poorly worded. As a result, there was some confusion regarding how "auto-negotiation" should work. Almost to a one, all the *switch* vendors read it one way, and made their gear work to match their reading. And all the vendors that made cards for the computer end read it the *other* way. The end result was that if you put both ends in "auto-negotiate", it was almost guaranteed that one end would pick "full duplex", and the other would pick "half duplex" - and things would work horrendously badly (actual transfer rates on 100mbit/sec cable comparable to dialup). Fortunately, within a year or two, most vendors had come oto an agreement, andnow most gear works.

2) You may indeed have a vendor that sees monetary advantage in not following, or almost following, a standard. For instance, Microsoft has long almost-but-not-quite followed a lot of Internet standards regarding protocols - their versions were subtly tweaked so they'd work OK with other Microsoft stuff, but not any other vendor.

Answer 2

NO, because they make more money the way they do things now.