Flashcards in Chapter 1: Compare the layers of the OSI and TCP/IP Models Deck (11)
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1
Layer 1-Physical
OSI
Electrical, mechanical, and procedural aspects of communication
-Defines the standard for the "wire" (or fiber optic, or wi-fi)
2
Layer 2-Data Link
OSI
Defines how we put data (1s and 0s) on the wire.
The Data Link Layer is split into two parts
-Logical Link Control (LLC)
-Media Access Control (MAC)
3
Layer 3-Network
OSI
Defines Logical addressing of computers and devices on the network.
-Logical addresses at the network layer are translated to physical at the Data Link Layer
-Primarily IP, but other protocols operate here
4
Layer 4-Transport
OSI
Defines the connection methods for communication.
-Some protocols established a guaranteed communication link, while others just whip their dick out for any devices "listening" on the wire
(TCP, UDP)
5
Layer 5-Session
OSI
Mostly for the establishment, maintenance, and termination of computer sessions
-Generally just establishes a communication link.
6
Layer 6-Presentation
OSI
Translating the stream of 1s and 0s on the wire
-Places information in a data stream the computer can understand
-Formats, encrypts, and compresses data
7
Layer 7-Application
OSI
The protocol that your application uses to begin to put data on the system
-Common example would be HTTP
8
Network Interface Layer
TCP/IP
Loosely aligns itself to the Physical and Data Link Layers (1 and 2)
Defines the wire and how data is put onto it
9
Internet Layer
TCP/IP
Loosely aligns itself with the Network Layer
-Logical communication links between computers, such as IPs
Largest example would be the Internet
10
Transport Layer
TCP/IP
Aligns itself to... The Transport Layer!
-TCP and UDP
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