2. The Host-to-Host Communications Model Flashcards Preview

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Flashcards in 2. The Host-to-Host Communications Model Deck (19)
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1
Q

What are the Layers of the OSI Reference Model

A
  1. Application
  2. Presentation
  3. Session
  4. Transport
  5. Network
  6. Data Link
  7. Physical
2
Q

Name and Function of OSI Reference Model Layer 1.

A

The Physical Layer

- Defines electrical, mechanical, procedural, and functional specifications for the physical link between devices.

3
Q

Name and Function of OSI Reference Model Layer 2.

A

The Data Link Layer

  • Defines how data is formatted for transmission and how access to physical media is controlled.
  • Uses a physical address (MAC Address) to identify hosts on the local network.
4
Q

Name and Function of OSI Reference Model Layer 3.

A

The Network Layer
- Provides connectivity and path selection beyond the local segment, all the way from the source to the final destination.

5
Q

Name and Function of OSI Reference Model Layer 4.

A

The Transport Layer

- Defines segmenting and reassembling of data belonging to multiple individual communications.

6
Q

Name and Function of OSI Reference Model Layer 5.

A

The Session Layer
- Establishes, manages, and terminates sessions between two communicating hosts to allow them to exchange data over a prolonged time period.

7
Q

Name and Function of OSI Reference Model Layer 6.

A

The Presentation Layer
- Ensures that data sent by the application layer of one system is “readable” by the application layer of another system.

8
Q

Name and Function of OSI Reference Model Layer 7.

A

The Application Layer

- The OSI layer that is closest to the user. It provides services to user applications that want to use the network.

9
Q

What are the Layers of the TCP/IP Protocol Suite?

A

Application
Transport
Internet
Link

10
Q

What does the Link Layer of the TCP/IP Stack do?

A

Defines protocols used to interface the directly connected network. Deals primarily with the physical network details.

11
Q

What does the Internet Layer of the TCP/IP Stack do?

A

Routes data from the source to the destination and provides a means to obtain information on reaching other networks.

12
Q

What does the Transport Layer of the TCP/IP Stack do?

A

It “prepares” application data for transfer over the network, and ensures that data from different applications is not mixed.

13
Q

What does the Application Layer of the TCP/IP Stack do?

A

This layer mainly deals with user interaction. Provides protocols and services that let you actually use the network.

14
Q

What are the two main protocols of the Transport Layer of the TCP/IP model?

A

TCP and UDP

15
Q

Define PDU

A

Protocol Data Unit

- The generic term use for a data unit regardless of where it is found the the TCP/IP Stack.

16
Q

General term for the PDU that is used at the Application Layer

A

Data

17
Q

Term for a Transport Layer PDU

A

Segment

18
Q

Term for an Internet Layer PDU

A

Packet

19
Q

Term for a Link Layer PDU

A

Frame