22
Differences:
•
TCP/IP combines the presentation and session
layers
into
its application
layer.
•
TCP/IP combines the OSI data link and physical layers
into
its network access
layer.
•
TCP/IP appears simpler because it has fewer layers.
•
The
TCP/IP
transport
layer
using
UDP
does
not
always
guarantee
reliable
delivery of packets, as the transport layer in the OSI model does.
2.4 Internet Protocol
Interne t Protocol (IP)
is a data-oriented protocol that
is
used widely on the Internet. IP
is
mainly used as a unique identifier assigned to each interface on an IP network.
So
basically, the ideal use of IP network is that each computer has a unique IP address.
Just
think an IP address is similar to phone number that relates to a person or the location of
home.
For example, take a phone number such as: +62 21 769 3678.
The
+62
part
identifies
the
country
that
it
resides. For
this
example,
it
is
in
Indonesia.
21 means that the location is in Jakarta
769 identifies that the number is in Jakarta Selatan area.
Last, 3678
is a unique
identifier
for that particular
house/office.
So, based on the
initial example, can be concluding that
the phone
number
is
located at a
house/office that is in Jakarta, Indonesia, and it is in Jakarta Selatan area.
There
are
two
versions
of
IP
addressing
that
are
available
today,
version
4
(Ipv4),
and
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