CCNA Revision (Session 4/1)

Channel:

MoMo-ElSafty

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10,900

Published on August 23, 2023 7:00:03 AM ● Video Link: https://www.youtube.com/watch?v=6LKq9j80HM4

Duration: 12:05

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Session 4 Agenda:
• Typical Network Components (Examples)
• Classification of Network Components
• Physical Layer
End device
It is the main component because it is the source of the application network
It is layer 7
Application layer
We need physical topology = Star topology
Hub
A centralized device that can provide physical star topology
It doesn’t know the final end or next hop
It floods bits (Mac)
Layer 1
In Lan Only

Physical
Star topology
Logical /Virtual
Bus topology
Switch
Wireless switch= wireless access point
It is a centralized device that can provide physical star topology.
It doesn’t know the final end, but it knows the next hop (Mac)
Layer 2
All Ports on a switch by H/W can support only single communication Technology.
Physical
Star topology
Logical
Mesh topology
Router
Gateway device
Understands Final End and Next Hop.
Software بطي
Layer 3
It is a device that supports S/W Different communication Technology (Technology Converter)