Просто образец работы студентов

1. Author:

2. Features of OSI model
Description of OSI layers
Defects of OSI model

3. Features
 Provision with communications and the
development of network protocols
 Representation of a computer network in
terms of abstraction layers
 Easy collaboration network hardware
and software

4. OSI layers
 physical layer
 data link layer
 network layer
 transport layer
 session layer
 presentation layer
 application layer

5. Layer 1: physical layer
 Main function:
Media, signal and binary transmission
 Protocols of layer:
X.25 (X.21bis, EIA/TIA-232, EIA/TIA-
449, EIA-530, G.703)

6. Layer 2: data link layer
 Main function:
Physical addressing
 Protocols of layer:
ISO/IEC 7666, X.25 (LAPB), Token Bus,
X.222, ISO/IEC 8802-2 LLC Type 1 and 2

7. Layer 3: network layer
 Main function:
Path determination and logical addressing
 Protocols of layer:
ISO/IEC 8208, X.25 (PLP), ISO/IEC
8878, X.223, ISO/IEC 8473-1, CLNP
X.233

8. Layer 4: transport layer
 Main function:
End-to-end connections, reliability and flow
control
 Protocols of layer:
ISO/IEC 8073, TP0, TP1, TP2, TP3, TP4
(X.224), ISO/IEC 8602, X.234

9. Layer 5: session layer
 Main function:
Interhost communication, managing
sessions between applications
 Protocols of layer:
ISO/IEC 8327, X.225, ISO/IEC 9548-1,
X.235

10. Layer 6: presentation layer
 Main function:
Data representation, encryption and
decryption, convert machine dependent data
to machine independent data
 Protocols of layer:
ISO/IEC 8823, X.226, ISO/IEC 9576-1,
X.236

11. Layer 7: application layer
 Main function:
Network process to application
 Protocols of layer:
FTAM, X.400, X.500, DAP, ROSE, RTSE,
ACSE, CMIP

12. Defects of OSI model
 Unmeaning concepts of protocols
 Incomplete specification
 Slow and difficult for realization protocols

13. Contact