Free CCNA | OSI Layers Demystified | Free CCNA 200-125 Tutorials – Part 3
Free CCNA – OSI Layers Demystified Part 3
This is the 3rd video from the OSI Layers Demystified Series.
When we talk about the upper 3 Layers, we start from top to bottom.
But, when we talk about the lower 4 layers of the OSI Model, we start from the bottom upwards.
Let’s start with the Physical Layer.
Anything that concerns cables, connectors, pins, electricity – all of these are within the confines of the Physical Layer.
The Data Link layer is in charge of Data Link encapsulations. Take note that switches are layer 2 devices, such that, protocols used by the switching functions all reside in the data link layer.
How about the Network Layer?
Routers are network Layer devices, such that all routing functions also reside in the network layer of the OSI Model.
How about the Tranport Layer?
The two Transport Layer Protocols are TCP and UDP. These two protocols makes sure that the data sent between two devices are sent reliably (for TCP) to the destination.
To better understand the lower 4 layer functions, check the video.
Channel Description:
Want to become a CCNA? This channel is aimed in helping Pinoys all over the world in getting their CCNA certification towards a career in Networking.
I will be releasing more FREE CCNA Videos and Tutorials soon so be sure to subscribe to my Youtube Channel.
Old CCNA Exam Code: CCNA 640-802
Old CCNA Exam Code: CCNA 200-120
Present CCNA Exam Code: CCNA v3 200-125
My Social Media Links:
Join my Facebook Study Group: https://www.facebook.com/groups/ITcertstudygroup/
Like my Facebook Fanpage: https://facebook.com/mnetsolutions
Get More FREE CCNA Materials from my blog: http://pinoyccnaselfstudy.com
GEAR USE:
TRIPOD: https://amzn.to/3gAJend
MIC: https://amzn.to/31o8NBt
MIC HOLDER: https://amzn.to/3a01946
ACTION CAMERA: https://amzn.to/2PFRJBP
MAIN CAMERA DSLR: https://amzn.to/2Dn7DhC
REFERENCE BOOKS:
CISCO CCNA BOOKS: https://amzn.to/3gzoqwi
CISCO CCNP BOOKS: https://amzn.to/3fCaD6N
source
ccna
