Osi Layer #
|
Iso
Layer Name
|
TCP/IP
#
|
TCP/IP
Layer Name
|
Encapsulation
on
Units
|
Devices
or components
|
TCP/IP
Protocols
|
Keywords/Description
|
1
|
Physical
|
1
|
Network Access
|
bits
|
repeater, hub,
transciever
|
Binary transmission signals
and encoding. Layout of pins, voltages, cable specifications, modulation
|
|
2
|
Data Link
|
frame
|
bridge, switch, NIC
|
Physical addressing and
access to media. Two sublayers: Logical Link Control (LLC) and Media Access
Control (MAC)
|
|||
3
|
Network
|
2
|
Internet
|
packets
|
Router
|
IP
|
Logical addressing and path
determination. Routing. Reporting delivery errors
|
4
|
Transport
|
3
|
Transport
|
segments
|
TCP, UDP
|
End-to-end connections and
reliability. Segmentation/desegmentation of data in proper sequence. Flow
control
|
|
5
|
Session
|
4
|
Aplication
|
data
|
Interhost communication.
Establishes, manages and terminates connection between applications
|
||
6
|
Presentation
|
data
|
Standard interface to data
for the application layer. MIME encoding, data encryption, conversion,
formatting, compression
|
||||
7
|
aplication
|
data
|
PC
|
FTP, HTTP,
POP3,IMAP, telnet, SMTP, DNS, TFTP
|
Network services for
application processes, such as file, print, messaging, database services
|
Ketika data ditransfer melalui jaringan, sebelumnya data tersebut harus melewati ke-tujuh layer dari satu terminal, mulai dari layer aplikasi sampai physical layer, kemudian di sisi penerima, data tersebut melewati layer physical sampai aplikasi. Dari masing-masing layer mempunyai tugas tersendiri demi kelancaran data yang akan dikirimkan. Berikut adalah deskripsi singkat beberapa tugas dari masing-masing layer dari layer application sampai physical.