Network Models Flashcards
Models are used to
represent how networks function
The two most popular network models are
The OSI seven-layer model and the TCP/IP model
The OSI models seven layers are
1 - Physical 2- Data Link 3- Network 4- Transport 5- Session 6- Presentation 7- Application
The OSI Physical layer covers
Cables
The OSI data link layer covers
Anything that uses a MAC address such as network cards, switches, etc
The OSI network layer covers
Logical addresses such as IP addresses and things that use them like routers
The OSI transport layer covers
PACKETS- assembles and disassembles packets
The OSI session layer covers
The actual connection between two systems(TCP/IP, PC to web server, etc)
The OSI presentation layer covers
(Old) Converts data into a format that your applications can read
The OSI application layer covers
The parts of the applications we use that makes them “network aware” (API)
The TCP/IP network interface layer covers
Physical cabling, mac addresses, network cards, most hardware excluding routers
The TCP/IP internet layer covers
IP addresses, routers, etc
The TCP/IP transport layer covers
Packet assembly/disassembly, system connection TCP/UDP
The TCP/IP application layer covers
Equivalent to the OSI session, presentation, and application layers.
What do port numbers do?
They help direct packet traffic between the source and destination
