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Justin Frasier 2023-09-16 00:07:25 +00:00
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Network_Plus/Network+_OSI.md
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@ -7,7 +7,7 @@
* Its the on and off on the cables.
---
## __Layer 2__ Frames
## __Layer 2__ - Frames
* ### Data Link Layer.
* Packagers data int frames and transmits those frames on the network.
* Layer 2 devices view networks __logically__.
@ -75,7 +75,7 @@
---
## __Layer 4__ Segments
## __Layer 4__ - Segments
* ### Transport Layer
* TCP Transmission Control Protocol
* Connection-oriented protocol that is a reliable way to transport segments across the network
@ -93,4 +93,19 @@
* Allows the clients to adjust the amount opf data in eash segment.
* Allows you to send more or fewer for eash segment.
* Buffering
* Occurs When devices allocate memory to store segments if bandwidth isn't readily avaiable
* Occurs When devices allocate memory to store segments if bandwidth isn't readily avaiable
---
## __Layer 5__ - Session
* Session Layer
* Keeps conversations separate to prevent intermingling of data
* Setup
* Checking of user credentaials and assigning numbers to sessions to help identify them.
* Some random number that would be assigned.
* Maintain
* Transfer Data (back and forth)
* Reestablish connedtion
* Acknowlegde receipt
* Tear down
* Ending of a sesion after the transfer is doneor when the other party disconnects.