Host to Host Communications

Question 1

OSI Model: All Layers

Answer 1

7 - Application
6 - Presentation
5 - Session
4 - Transport
3 - Network
2 - Data-Link
1 - Physical

Question 2

TCP/IP Stack: All Layers & How they match with OSI

Answer 2

Application - Session, Presentation, Application
Transport - Transport
Internet - Network
Network Access - Physical, Data-Link

Question 3

OSI Layer 7: Application Layer Basics

Answer 3

Provides network services to the applications of the user
Does not provide services to any other OSI layer
Establishes availability of intended communication partners
Synchronizes & establishes agreement on procedures for error recovery & control of data integrity

Question 4

OSI Layer 6: Presentation Layer Basics

Answer 4

Ensures that info that is sent at the application layer of one system is readable by the application layer of another system

Can translate among multiple data formats using a common format
(Computers with different encoding schemes)

Question 5

OSI Layer 5: Session Layer Basics

Answer 5

Establishes, manages, & terminates sessions between two hosts

Synchronizes dialog between the presentation layers of the two hosts & manages their data exchange

Offers efficient data transfer, CoS, & exception reporting of upper layer problems