OSI model Flashcards
What is the 7th layer in the OSI model
Application layer
What is the 6th layer in the osi model
Presentation layer
What is the 5th layer of the OSI stack?
Session layer
What is the primary purpose of the application layer?
The layer that houses the network aware application
What is the primary purpose of the presentation layer
Format the communication “language” so it is understood on the other side.
Ex. MP3, JPEG
Which layer does encryption live?
Presentation layer
What is the primary purpose of the session layer?
Start and stop communication between the host and client.
What is the 4th TCP/IP layer called
Application layer
Where does the application layer, the presentation layer, and the session layer live in the computer?
In the Application on the computer
What is the TCP/IP model look like
4-application
3-transportation
2-internet layer
1- Network access layer
What does the OSI model look like
7-application layer 6-presentation layer 5-session layer 4-transport layer 3-network layer 2-data link layer 1–physical layer
What does the transport layer do?
Decides which protocol is used for data transmission.
What are the two main transportation protocols
UDP
-and-
TCP
What decides the transportation protocols choice
The application of the computer
What does UDP stand for
User data-gram protocol
What are The characteristics of UDP traffic
Not reliable, but fast. Good for real time data.
Ex, live video, VOIP, online gaming
What are The characteristics of TCP traffic?
Reliable but not as fast. EX. Web browsers
What is the layer between the Transport layer and the session layer?
Ports
What is the purpose of Ports
To make sure the data being sent goes the to the right service on the device. Ports are given In the application layer.
Which layer supports logical addressing
OSI-Network layer
TCP/IP- internet layer
The OSI protocol is the preferred protocol In most networks today. True/false?
False.
The OSI protocol is hardly ever used. The TCP/IP protocol it used today. The OSI reference model is the preferred model
TCP or UDP ____ allow an application to know which data is meant for a specific service?
Ports
_____ is added to the end of a frame to run a hash and ensure that the data being sent is what is received.
Cyclical redundancy check -or- CRC
