Download Chapter 3 OSI Model Worksheet In class lecture and handout.

Chapter 3 OSI Model Worksheet
ITCC 1401 CCNA 1: Intro to Networks
1.
What does OSI stand for?
2. How does the OSI model work and include an example:
3. Explain the purpose of each of the seven layers of the OSI model:
Application:
Presentation:
Session:
Transport:
Data Link:
Physical:
How does TCP/IP differ from the OSi Model?
Explain application protocols:
Explain transport protocols:
Explain network protocols:
1. This layer is responsible for providing reliable and unreliable data connections.
____________________
2. This layer specifies how addresses are assigned and how packets of data are forwarded from
one network to another toward the destination.
3. This layer corresponds to the network hardware (cabling, media). This layer determines how
binary data is translated into electrical, optical, or other types of physical signals transmitted
between systems. ________________________
4. This layer provides the connection point for applications. It specifies the details of how an
application makes requests and how the application on another machine responds.________
5. This layer establishes the rules of the conversation between two applications. For example, will
they take turns speaking, or can they send and receive at the same time. _________________
6. This layer specifies how packets of data are organized into frames on a particular type of
network and the rules for inserting frames on to the network media. _______________
7. This layer specifies the arrangement, or syntax, of the data that the application expects. For
example, .gif, .jpeg, .mpeg, .avi file extensions. _____________________________
8. List the steps of encapsulation as if a user was creating the data to be sent out over the network
to another user and explain what the corresponding OSI layer does to prepare the data to be
sent over the network.
A.___________________________________________
B.___________________________________________
C.___________________________________________
D.___________________________________________
E.____________________________________________
F.____________________________________________
9. What layer of the OSI model does a router operate?_____________________________
10. What layer of the OSI model does a switch operate?___________________________________