What is considered as Layer 1?
Layer 1 in the OSI model.
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Connectors:
- RJ11 connector
- RJ45 connector
- SFP ports
- SFP+ ports
- Infiniband
- HDMI (yes! for networks!)
- legacy: BNC connector
- New stuff in network connectors:
- ARJ45 - for high speed applications up to 1000MHZ
Copper cables:
- Coaxial
- Cat 1,2,3,4
- Cat 5
- Cat5e
- Cat6
- cat 6e,7 and beyond
- UTP
Optic-Fibre connectors, cables and similar:
- Single-mode
- Multi-mode
- Twinax cable
Make a list of the most popular types of optical connectors.
WIFI
- 2.4 ghz and 5 ghz
- B standard
- G standard
- N standard
- A, C standard
We will do a module on wireless tech later on, so there is no need to go very deep this time.
Questions that need answering:
What is an RJ11 traditionally used for?
What is ISDN?
What is RJ45 traditionally used for? how many cables does it contain?
What is an RJ11 traditionally used for?
What is ISDN?
What is RJ45 traditionally used for? how many cables does it contain?
What does "twisted pair" mean? what is the objective of the "twisted pair" ?
How many cables does 10/100 use?
What are the cabling standards?
What is autonegotiation?
How many cables does gigabit use?
What is autonegotiation?
How many cables does gigabit use?
Can you manually negotiate to 1Gbit?
Can I run gigabit ethernet over a Cat5e cable?
when and why do we use a crossover ethernet cable?
what is the difference between shielded and un-shielded cable?
What is the difference between Multimode and Single mode fiber
What is the maximum speed of an SFP ? and an SFP+ ? Why?
What is the maximum distance supported by mono-mode and multimode fiber?
[trick question]
In a netgear switch stack configuration we can use a regular sfp+ to achieve speeds of 12-14 gigabit per second for the switch interconnection. Why?
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[More questions will be added]
Can I run gigabit ethernet over a Cat5e cable?
when and why do we use a crossover ethernet cable?
what is the difference between shielded and un-shielded cable?
What is the difference between Multimode and Single mode fiber
What is the maximum speed of an SFP ? and an SFP+ ? Why?
What is the maximum distance supported by mono-mode and multimode fiber?
[trick question]
In a netgear switch stack configuration we can use a regular sfp+ to achieve speeds of 12-14 gigabit per second for the switch interconnection. Why?
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[More questions will be added]
Layer 1 devices and applications:
BridgeHub
Optical splitter
Dark Fibre
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