Network protocols
What is it




It is a set of rules which
governs the
communications between
the computers on a
networ...
The OSI model
stack





It divides the complexion
to computer to
computer.
Its simply called as
internetworking.
Layer...
Application layer.
 This

is the layer at which communication
partners are identified
 Quality of service is identified
...
How it functions.








Application layer ISO OSI protocols
are used by both the source and
destination devices duri...
Presentation layer
 Usually

it’s a part of an operating system.
 It converts the incoming and outgoing
presentations fo...
How it functions.







It communicates with
layer above and the
layer below it.
Performs encryption for
security pur...
Session layer
 This

layer sets up, coordinates, and
terminates conversations and dialogs
between the applications at eac...
How it functions…





It maps the connection to the
transport layer.
Sometimes organizes or manages
one or more connec...
Transport layer
 This

layer manages the end-to-end
control.
 It determines whether all the packets that
are transmitted...
How it functions
 Flow

control
 Multiplexing data
 Error checking and
recovery
 Virtual circuit
management
Network layer
 This

layer handles the routing of the data
 It sends packets in the right direction to
the right destina...
How it functions
 This

layer provides
data routing paths
for network
communication.
 Data is transferred
in the form of...
Its most important protocols.










IPv4: IP stands for Internet Protocol while v4 indicates that it
is the versi...
Data link layer
 This

layer provides synchronization for the
physical level and does bit-stuffing for
strings of 1's in ...
How it functions
 Physical

addressing
 It controls the flow
 Identify the errors
 Determines the
topology
Physical layer
 It

conveys the bit stream through the
network at the electrical and mechanical
level
 It provides the h...
How it functions






It transmits data into
physical media
It converts data from
the physical media
It fragments the...
References.




http://searchnetworking.techtarget.com/definition/OSI
https://www.globalsign.eu/ssl-information-center/...
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Network Protocols

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Network Protocols

  1. 1. Network protocols What is it   It is a set of rules which governs the communications between the computers on a network It configures the characteristics of a network such as the cabling types, usage, the topology and the bandwidth. OSI Model    OSI (Open Systems Interconnection) is a standard description or "reference model" for how messages should be transmitted between any two points in a telecommunication network Its purpose is to guide product implementers so that their products will consistently work with other products. The reference model defines seven layers of functions that take place at each end of a communication.
  2. 2. The OSI model stack    It divides the complexion to computer to computer. Its simply called as internetworking. Layers in the OSI model are ordered from lowest level to the highest level.
  3. 3. Application layer.  This is the layer at which communication partners are identified  Quality of service is identified  User authentication and privacy are considered, and any constraints on data syntax are identified.
  4. 4. How it functions.     Application layer ISO OSI protocols are used by both the source and destination devices during a communication session. In order for the communications to be successful, the application layer protocols implemented on the source and destination host must match accordingly. Protocols establish consistent rules for exchanging data between the relevant devices which is on the network session. Protocols specify how data inside the messages is structured and the types of messages that are sent between source and destination.
  5. 5. Presentation layer  Usually it’s a part of an operating system.  It converts the incoming and outgoing presentations format to another .  Ex: syntax layer
  6. 6. How it functions.     It communicates with layer above and the layer below it. Performs encryption for security purposes Sometimes performs data compression to reduce the bits Some of the common protocols under this layer can be jpeg,avi,mp3.
  7. 7. Session layer  This layer sets up, coordinates, and terminates conversations and dialogs between the applications at each end  The session layer establishes, manages, and terminates communication sessions between presentation layer entities.  It also communicates with transport layer below to recover a session in case of a network disrupt.
  8. 8. How it functions…    It maps the connection to the transport layer. Sometimes organizes or manages one or more connections between layers and applications. Session connection recovery.
  9. 9. Transport layer  This layer manages the end-to-end control.  It determines whether all the packets that are transmitted arrive.  It also controls the flows of the connection.
  10. 10. How it functions  Flow control  Multiplexing data  Error checking and recovery  Virtual circuit management
  11. 11. Network layer  This layer handles the routing of the data  It sends packets in the right direction to the right destination on outgoing transmissions and receiving incoming transmissions at the packet level  The main role of it is routing and forwarding
  12. 12. How it functions  This layer provides data routing paths for network communication.  Data is transferred in the form of packets via logical network paths in an ordered format controlled by the network layer
  13. 13. Its most important protocols.      IPv4: IP stands for Internet Protocol while v4 indicates that it is the version 4. Here, version 4 refers to the fourth revision of the Internet Protocol that was later widely deployed. IPv6: This is also an Internet Protocol that is of version 6. Though IPv4 is widely used these days, it is expected that this IPv6 is going to take over the rest of the attention. CLNP: CLNP stands for Connectionless Network Protocol. The service that this protocol renders is called CLNS. This routes the messages to their destination independently. IPsec: Internet Protocol Security is one such protocol that enables encryption and also authentication of every IP packet that moves in the data stream. ICMP: ICMP stands for Internet Control Message Protocol. This particular protocol is very important among all the network layer protocols.
  14. 14. Data link layer  This layer provides synchronization for the physical level and does bit-stuffing for strings of 1's in excess of 5  It furnishes transmission protocol knowledge and management.  It has two types named as Broadcast networks and Point to point networks.
  15. 15. How it functions  Physical addressing  It controls the flow  Identify the errors  Determines the topology
  16. 16. Physical layer  It conveys the bit stream through the network at the electrical and mechanical level  It provides the hardware means of sending and receiving data on a carrier
  17. 17. How it functions     It transmits data into physical media It converts data from the physical media It fragments the data into frames It communicates with data link layer above.
  18. 18. References.    http://searchnetworking.techtarget.com/definition/OSI https://www.globalsign.eu/ssl-information-center/whatis-ssl.html http://compnetworking.about.com/cs/designosimodel/ a/osimodel.html

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