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2.2.1 Application
Layer
The
top
layer
of
the
TCP/IP layer is the Application layer, application layer handle and
ensuring the delivering of data between layers. The application layer handles high –
level
protocols and issues of representation, encoding, and dialog control [4]. Protocols that are
used
in the application layer are:
2.2.1.1 FTP
FTP
stands
for
File
Transfer
Protocol.
The
TCP/IP
Internet
protocol
used
when
transferring single or multiple files from one computer system to another. FTP uses a
client/server
model,
in
which
a
small
client program runs
on
your computer and accesses
a larger FTP server running on an Internet host. FTP provides all the tools needed to look
at directories and files, change to other directories, and transfer text and binary files from
one system to another [6].
2.2.1.2 SMTP
SMTP stands for Simple Mail Transfer Protocol. The TCP/IP (Transmission
Control Protocol/Internet Protocol) protocol that provides a simple e- mail service and
is
responsible
for
moving e-mail messages from one e- mail server to another.
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