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Session 1Network models and protocols Presented by Muhammad A. Daif 3rd year CSED CCNA
Session objectives Protocols… definition and examples   Network architectures and models.   ,[object Object]
      TCP/IP3. Encapsulation and headers. ,[object Object],[object Object]
protocols  ,[object Object],وقعت سورية وروسيا بروتوكولاً للتعاون بين البلدين من شأنه زيادة حجم التبادل التجاري وإقامة مشاريع مشتركة ويتضمن البروتوكول الذي وقع في اختتام اجتماعات اللجنة الاقتصادية السورية الروسية المشتركة على التعاون في المجالات الاقتصادية والتجارية والعلمية والفنية، اضافة إلى الجوانب الصناعية والمصرفية والطاقة والنفط والغاز والري والنقل والسياحة والاتصالات والتقانة والمجالات التجارية والاستثمارية والزراعية.  كما تضمن البروتوكول الموافقة على المشاريع المقترحة من قبل رجال أعمال البلدين حول الاستثمار المشترك في مجالات بناء السدود المائية والطاقةالكهربائية وصناعة النسيج. ,[object Object],            rules about appearance, speaking, listening and understanding.
protocols And in computer networks ?? ,[object Object],[object Object]
Vendors Defined protocols Great ! What do you mean by Vendors defined protocols ? DEC’s DECnet IBM’s SNA
Appearance of Models standardized networking models. OSI reference model.  TCP/IP. Protocol suit, protocol stack.
Layers and modularization.
Layering Benefits Less Complex. Standard Interfaces. Easier to learn. Easier to develop. Modular engineering.
OSI Reference model
OSI reference model Just a reference model … no real implementation  7 Layers model     Tips :        All People Seem To Need Data Processing Please Do Not Take Sales-People's Advice Please Do Not Throw Sausage Pizza Away Pew! Dead Ninja Turtles Smell Particularly Awful
OSI reference model Layer 1 – Physical Layer physical characteristics of the transmission medium. connectors, pins, use of pins, electrical currents, encoding, light modulation.
OSI reference model Layer 2 – Data Link Layer Defines the rules (protocols) that determine when a device can send data over a particular medium. detect transmission errors. Protocols used : X.25
OSI reference model Layer 3 – Network Layer Logical addressing Routing Path determination Protocol s :      Connectionless Network Services (CLNS)
OSI reference model Layer 4 – Transport Layer Reliable data transfer Flow control Segmentation / De-segmentation Error control Protocols :                         TP0, TP1, TP2, TP3, TP4
OSI reference model Layer 5 – Session Layer defines how to start, control, and end conversations (called sessions). Full-duplex, Half-duplex. Graceful close.
OSI reference model Layer 6 – Presentation Layer ,[object Object]
Encryption.,[object Object]
Mail Transfer clients using X.400
No protocol for web browsing.,[object Object]
TCP/IP The Internet model, supported by all OSes. 4 (may be 5) Layers .
TCP/IP
TCP/IP Network Access defines the protocols and hardware required to deliver data across some physical network. cabling, addressing, and protocols. Protocols :       Ethernet, Frame Relay, ATM Devices used: Switches
TCP/IP Internet Layer Provides unique address for each computer. defines the process of routing. Protocols :      IP (Internet Protocol) Devices used: Routers
TCP/IP Transport Layer Port Definition. Well Known Ports(0-1023) Registered Ports(1024 - 49151)  Dynamic Ports (49151 – 65535) Protocols Used : TCP, UDP Features of TCP  and UDP
TCP/IP Application Layer Provides services to the application software running on a computer. Does not define the application itself, but rather it defines services that applications need. Protocols used :       HTTP,FTP, POP3, SMTP.
TCP/IP – Application
Encapsulation Definition :        The term encapsulation refers to the process of putting headers and trailers around some data. ,[object Object],           In information technology, Header refers to supplemental data placed at the beginning of a block of data being stored or transmitted, which contain information for the handling of the data block.
Encapsulation
Encapsulation
Encapsulation
Encapsulation
Thank you

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Internet Protocols

  • 1. Session 1Network models and protocols Presented by Muhammad A. Daif 3rd year CSED CCNA
  • 2.
  • 3.
  • 4.
  • 5.
  • 6. Vendors Defined protocols Great ! What do you mean by Vendors defined protocols ? DEC’s DECnet IBM’s SNA
  • 7. Appearance of Models standardized networking models. OSI reference model. TCP/IP. Protocol suit, protocol stack.
  • 9.
  • 10.
  • 11.
  • 12.
  • 13.
  • 14. Layering Benefits Less Complex. Standard Interfaces. Easier to learn. Easier to develop. Modular engineering.
  • 16. OSI reference model Just a reference model … no real implementation 7 Layers model Tips : All People Seem To Need Data Processing Please Do Not Take Sales-People's Advice Please Do Not Throw Sausage Pizza Away Pew! Dead Ninja Turtles Smell Particularly Awful
  • 17. OSI reference model Layer 1 – Physical Layer physical characteristics of the transmission medium. connectors, pins, use of pins, electrical currents, encoding, light modulation.
  • 18. OSI reference model Layer 2 – Data Link Layer Defines the rules (protocols) that determine when a device can send data over a particular medium. detect transmission errors. Protocols used : X.25
  • 19. OSI reference model Layer 3 – Network Layer Logical addressing Routing Path determination Protocol s : Connectionless Network Services (CLNS)
  • 20. OSI reference model Layer 4 – Transport Layer Reliable data transfer Flow control Segmentation / De-segmentation Error control Protocols : TP0, TP1, TP2, TP3, TP4
  • 21. OSI reference model Layer 5 – Session Layer defines how to start, control, and end conversations (called sessions). Full-duplex, Half-duplex. Graceful close.
  • 22.
  • 23.
  • 24. Mail Transfer clients using X.400
  • 25.
  • 26.
  • 27. TCP/IP The Internet model, supported by all OSes. 4 (may be 5) Layers .
  • 29. TCP/IP Network Access defines the protocols and hardware required to deliver data across some physical network. cabling, addressing, and protocols. Protocols : Ethernet, Frame Relay, ATM Devices used: Switches
  • 30. TCP/IP Internet Layer Provides unique address for each computer. defines the process of routing. Protocols : IP (Internet Protocol) Devices used: Routers
  • 31. TCP/IP Transport Layer Port Definition. Well Known Ports(0-1023) Registered Ports(1024 - 49151) Dynamic Ports (49151 – 65535) Protocols Used : TCP, UDP Features of TCP and UDP
  • 32. TCP/IP Application Layer Provides services to the application software running on a computer. Does not define the application itself, but rather it defines services that applications need. Protocols used : HTTP,FTP, POP3, SMTP.
  • 34.
  • 35.