OSI and TCP/IP Models with attacks in each layer.

1. Network Models
Namesh Sanjitha

2. Overview
Why do we need one…..?

3. OSI - Open Systems Interconnect

4. 1. Physical Layer
Bit Stream
Electrical Pulses
1. Physical
Layer
● Defines the physical aspects
■ Cables
■ NICs
■

5. 2. Data Link Layer
Two sub layers:
1. MAC - Media Access Control Layer
i. Physical Addressing
ii. Accessing Shared Medium
2. LLC - Logical Link Control Layer
i. Error Control
ii. Data Framing
iii. Frame Sync

6. 3. Network Layer
● Logical Addressing
● Host to Host Communication
● Routing

7. 4. Transport Layer
● End to End Communication
● QoS
● Error Control
● Flow Control

8. 5. Session Layer
● Creating,
● Managing and
● Terminating
of Sessions

9. 6. Presentation Layer
● Data Formating
○ Provides independence from compatibility problems
● Data Encryption

10. 7. Application Layer
Provides Services required by applications
● File Transfer
● E-mail
● Web

11. TCP/IP
No need to study separately,
we have seen it all in OSI……...

12. Attacks
Let’s go with OSI, since it is more
abstract

13. Physical Layer
● Eavesdropping
● Replay Attack
● DoS :)

14. Data Link Layer
● MAC Address Spoofing
● ARP Poisoning
● MAC Flooding

15. Network Layer
● Ip spoofing
● DoS
● Twin Access Point
● Ping of Death
● ICMP MITM

16. Transport Layer
● Syn Flood
● Smurf

17. Session Layer
● Session Hijacking
● Phishing

18. Presentation Layer
● SSL stripping
● Malicious SSL Requests

19. Application Layer
● DNS Spoofing
● Injection Attacks
● Browser Exploitation
● Brute Force Attacks

20. Q&A

21. Thank you!