Introduction to Networking and OSI Model

1. Introduction
to Networking
and OSI Model
We’ll start at 8:3

2. Asraa Alsowaiket
@israahjs
Cyber Security Student - IAU
DSC Core member
Kawthar Alsharah
@kawthvr
Cyber Security Student - IAU
DSC Core member

3. Outline
• Network Terminology
• What is OSI model?
• The importance of OSI model
• The 7 layers of OSI model

4. c
“We spend more time on the Cyber
Space than we spend on earth!”
-Dr.Maraym Temitayo

5. NETWORK

6. Network Components
• Message
• Sender
• Receiver
• Transmission medium
• Protocols

7. Network devices

8. c
Network Protocols are a set of rules
governing exchange of information in an
easy, reliable and secure way.
Protocolshttps://www.internetlivestats.com/

9. What is OSI model?
The OSI Model (Open Systems Interconnection Model) is a
conceptual framework used to describe the functions of a
networking system.
The OSI model characterizes computing functions into a
universal set of rules and requirements in order to support
interoperability between different products and software.

10. What if there was no OSI model?
Why it’s important!
•To standardize data networking protocols to allow
communication between all networking devices across
the entire planet.
•To create a common platform for software
developers and hardware manufactures.
•To help network administrators by dividing large data
exchange process in smaller segments

11. The Seven Layers
of OSI Model

12. Encapsulation/Decspsulation
Israa
(Sender)
Kawthar
(Receiver)

14. 7.Application Layer
App LayerI wanna do.…
Okay! I’ll provide
my service

15. 7.Application Layer
• Nearest layer to the end user
• Provide services to perform user-
activates.
File Transfer Protocol
(FTP)
Simple Mail Transfer
protocol
(SMTP)
Hyper Text Transfer
Protocol
(HTTP)

16. 7.Application Layer

17. 6.Presentation Layer
Data
Formatting
Encryption/
Decryption
Compression/
Decompression

18. 6.Presentation Layer

19. 5.Session Layer
•1)Control / Manage / Delete the logical path
•2)Authentication

20. 5.Session Layer
Logical Path
S R

21. 5.Session Layer

22. 5.Session Layer
•1)Control / Manage / Delete the logical path
•2)Authentication

23. 5.Session Layer
Authentication

24. 5.Session Layer

25. 4.Transport Layer

26. TCP vs UDP
4.Transport Layer

27. 4.Transport Layer
Port Numbers
Client HTTP Server
172.145.2.9: 80
37.106.108.146: 53678
Source: 53678
Destination: 80
Source: 80
Destination: 53678

28. 4.Transport Layer

29. 3.Network Layer
• Logical/IP Addressing
• Routing
Estren Province, KSA
169.251.27.245

30. 3.Network Layer

31. 2.Datalink Layer
Framing
Flow Control
Physical Addressing

32. MAC Address
● Definition: A MAC address is a
hardware identification number
that uniquely identifies each
device on a network.
● Used for local communication .
● EX : 00-14-22-01-23-45

33. How to find MAC Address ?

34. 2.Datalink Layer

35. 1.Physical Layer
• Interface
• Transmission Modes

36. 1.Physical Layer

38. TCP/IP Suite model

39. Asraa Alsowaiket
@israahjs
Cyber Security Student - IAU
DSC Core member
Kawthar Alsharah
@kawthvr
Cyber Security Student - IAU
DSC Core member

41. Thanks for
Listining!