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Correct - the first version of TCP included the functionality of IP. Maybe another reason why people say "TCP/IP" is that the vast majority of the time when you're sending data over IP, you want to guarantee that all of it gets delivered and in the right order, so you use TCP. For instance, all HTTP and FTP traffic uses TCP. One category of exceptions is real-time data; Skype, for instance, uses UDP, because you'd rather get the latest packet in a conversation than stop everything to get one that you missed.
– Nathan Long
Commented Jul 21, 2012 at 15:42

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create code fences with backticks ` or tildes ~
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like so
```
add language identifier to highlight code
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def function(foo):
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```
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