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Name 7 layers of OSI models and define their functionality.
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Name 7 layers of OSI models and define their functionality.
10,414 Views | (42 votes, avg: 2.79)
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Layer# name Functionality
7 Application program-to-program communication
6 Presentation Manages Data representation and conversions
5 Session Establishing and maintaining communications channels
4 Transport end-to-end integrity of data transmission
3 network Routes data from one node to another
2 data link physically passes the data from one node to another
1 physical putting the data on the network media and taking the data off
7 Layers of OSI Architechture
—————————–
1. Application Layer
2. Presentation Layer
3. Session Layer
4. Transport Layer
5. Network Layer
6. Link Layer
7. Electrical/Physical
7. Electrical/Physical
———————-
Responsible for defining various Electrical
standards, like standardized Cables, Bit
Stream Standards etc, to be used while
communicating between HOSTS (Computers).
6. Link Layer
————-
Responsible for Encoding & subsequent
De-Coding of Data Packets at various
Network points.
5. Network Layer
—————-
Responsible for providing LOGICAL paths for
Data packets to pass through. It basically
provides SWITCHING & ROUTING facilities.
4. Transport Layer
——————
Responsible for TRANPARENT flow of data
between HOSTS (Computers), without due
consideration to HARDWARE details. This
layer is not concerned as to which
applications are sharing data; rather it
is only concerned with TRANSFERRING
DATA PACKETS FROM ONE POINT TO ANOTHER-
3. Session Layer
—————-
Responsible for maintaining a REGISTRY of
all currently active connections from
various HOSTS (Computers).
2. Presentation Layer
———————
Responsible for isolating different Data
formats from each other. Ex.: Encryption
process involves the AUTOMATIC conversion
of Application data Format to Network Format
& Vice-Versa.
1. Application Layer
——————–
Responsible for END-USER friendly protocols,
like HTTP, FTP, TELNET etc. Software
Developers directly interact with this
layer of protocol to write programs.
I have one interesting line to remember all these layer names,hope this will help!! :-
Please (Physical)
Do (Data Link)
Not (Network)
Touch (Transport)
Steve’s (Session)
Pet (Presentation)
Alligator (Application)
We were given the saying “Please Do Not Throw Sausage Pizza Away,” Physical, Data link, Network, Transport, Session, Presentation, Application. Having it relate to food seemed to help.
a short cut way to remember the 7 layers
Please (Physical)
Do (Data Link)
Not (Network)
Trust (Transport)
Sales (Session)
Persons (Presentation)
Advise (Application)
physical layer-to program communication
For all punjabi Guys
A-nu
P-reet
S-ingh
T-ruck
N-aal
D-elhi
P-ahuncheya
Here’s one that worked for me
Application = All
Presentation = People
Session = Should
Transport = Transport
Network = Network
Data= Data
Physical = Physically
All
People
Seem
To
Need
Data
Processing
OSI is open system connectivity model.There are 7 layers in OSI model.they are:-
1. Physical layer
2. Data link layer
3. Network layer
4. Transport layer
5. Session layer
6. Presentation layer
7.application layer
Now the functionality of each layer are as followes:-
1.Network layer is responsible for movement of individual bits from one hop(node) to the next.
2.Datalink layer is responsible for moving frames from one hop(nodes) to next.
3.Network layer is responsible for delivery of individual packets from the source host to destination host.
4.Transport layer is responsible for delivering of a message from one process to another.
5.Session layer is responsible for dialog control and synchronization.
6.Presentation layer is responsible for translation,compression and encryption.
7.Application layer is responsible for providing services to user.
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