On 02/12/2013 08:19 PM, Mike S wrote:
On 2/10/2013 6:04 PM, Magnus Danielson wrote:
You should read "TCP/IP" as "Internet Protocols" (notice plural form
here). It points to the stack of protocols,
Actually, no. IP is Internet Protocol, singular, and is the L3 (mostly -
IP predates the ISO/OSI model layers, so IP suite protocols don't map
exactly) protocol upon which both TCP and UDP are built. It's defined by
RFC 791.
TCP/IP, simply because those are the most commonly used protocols in the
suite.
In the context it was written, it used the well spread misnomer of the
suite to be referred to TCP/IP. The protocol suite was many times
referred to as TCP/IP even if UDP was used for the particular transport
over IP. It is a confusing thing and people have become better at using
the correct terms, so in the context that "NTP used TCP/IP" is means
that NTP uses the Internet Protocol suite, not TCP over IP.
As I recall NTPv3 in RFC 1305, it only specifies UDP over IP.
The ISO/OSI model stuff is a bad fit for the IP-stack, but it got stuck
and fits the reality really bad. It's usage is discouraged.
Cheers,
Magnus
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