The seven layers of the OSI model are:
Physical layer: responsible for transmitting raw data bits over a physical medium such as a cable.
Data Link layer: provides error-free transmission of data frames over the physical layer.
Network layer: responsible for routing and addressing of data packets.
Transport layer: provides reliable end-to-end communication between applications.
Session layer: establishes, manages, and terminates communication sessions between applications.
Presentation layer: formats and encrypts data for network transmission.
Application layer: provides the interface between the application and the network for communication.
Layer 3 (Network): In the OSI model, the network layer handles logical addressing, routing, and the creation and management of packets. The IP header is a crucial part of the network layer in the OSI model.
I hate the OSI stuff. The osi layers always been just a massive struggle to me, probably just the dyslexia thing usually trying to remember a list is just really hard. Wrote one thing I have noticed is a lot of things that have to do with connection it's usually on layer 3. Kind of like how switches are layer 3 devices. That's how I kind of remember that usually something with the IP address it would be layer 3 on the OSI layer.
I just only use the PDUs as a reference to the layers.
Data, Segments, Packets, Frames, Bits
I list that in the order of the OSI model from 7-1
Layer 7-6 Data
Layer 4 Segments
Layer 3 Packets
Layer 2 Frames
Layer 1 Bits
Then all it is is just figuring out what devices handles those PDUs
Network layer, layer 3. The most significant protocol at layer 3 (also called the network layer) is the Internet Protocol, or IP. IP is the standard for routing packets across interconnected networks--hence, the name internet.
I believe that switches typically operate on level 2 (Datalink), but there are layer 3(Network) switches. The way that I remember the layers is Please (Physical) Do (Datalink) Not (Network) Throw (Transport) Sausage (Session) Pizza (Presentation) Away (Application).
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