1 - Flow of OSI LAYERS Flashcards
Application - Scribe
This Layer provides Network services to the PC.
Http, Web server, Mail server etc
Scribe is the one who writes the message
Presentation - Translator
Formats Data to the correct format so it can be read properly on the other side.
It can encrypt, decrypt and format data before sending down the protocol track
Session - Schmoozer
schmoozer - Negotiate communication
Manages and terminates session between Applications
Transport - Middle manager
In charge of transportation.
Tracks Data - makes sure receipt is received of delivery.
End to end communication.
TCP - UDP
Ports are used to to track sessions.
Network - Mail room guy
Is responsible for adding which street, which door Number. ( Source ip, destination ip )
To send via which path ?
Ip address and router.
Logical address and path selection.
Data Link - Envelope guy
Controls the formatting of frames before they are transmitted.
This layer uses Frame check sequence ( FCS )
Frame/ framing - Mac address
Physical - Truck
Electrical signal - transfer of electrical signal (bits)