OSI 7-Layer Networking Model

Question 1

OSI 7-Layer Model

Overview

Answer 1

The OSI (Open Systems Interconnection) model is a conceptual framework that describes the communication functions of a telecommunication or computer system.
These layers are designed to provide a standardized approach to network communication, allowing different types of devices to communicate with each other regardless of their underlying hardware or software. By understanding the functions of each layer in the OSI model, network engineers and IT professionals can design, implement, and troubleshoot complex networks more efficiently and effectively.

Question 2

Layer 1

Medium ?
Communication between devices ?

Answer 2

Question 3

Layer 1 Hub

Multiple devices in layer 1

Answer 3

Question 4

Layer 1 summary

5 points

Answer 4

• Physical shared medium
• Standards for transmitting onto the medium
• Standard for receiving form the medium
• No access Control
• No uniquely identified devices

Question 5

Layer 2

FRAME

Answer 5

Question 6

Layer 2 - summary

Answer 6

• identifiable devices
• media access controll
• collision detection
• Unicast communication 1:1
• broadcast 1:ALL
• Switches

Question 7

Layer 2 - CSMA/CD

Answer 7

Question 8

Layer 3 overview

Answer 8

Question 9

Layer 3 IPv4

Answer 9

Question 10

L3 - SubnetMask

Answer 10

Question 11

L3 - Rout tables

Answer 11

Question 12

L3 - Summary

Answer 12

Question 13

L3 - Routing

Answer 13

Question 14

L4 TCP vs UDP

Answer 14

Question 15

TCP Segments

Answer 15

Question 16

TCP Architercture

Answer 16

Question 17

TCP 3 way Handshake

Answer 17

Question 18

Stateless firewall

Answer 18

Question 19

Statefull firewall

Answer 19