What is a HUB?
A device used to connect networks together.
How many devices can communicate using a hub?
One, we call this half-duplex
What is the main disadvantage of a hub?
As traffic increases it becomes less efficient as it can only work with one device at a time
What rate can hubs communicate at?
10/100Mbit/s
What is a Switch
Modern device to connect networks together
What can Switches do?
- Forwards traffic to where it needs to go ASIC (application Specific integrated circuit)
What types of switches are there?
Unmanaged and Managed
What is an unmanaged switch?
A basic, plug-and-play network device that connects multiple Ethernet devices (like computers, printers) in a small network
What is a router?
Used to route traffic from one subnet to another. Connects multiple types of networks together
What is a managed switch?
Allows more advanced settings for switches like managing port speeds, access, etc
How does a router work?
Makes forwarding decisions based on destination IP. Using a routing table inside the device
What is a layer 3 switch?
A switch that combines the fast switching of a Layer 2 switch with the routing intelligence of a router
What is an Access Point?
A device that connects wireless devices to a wired network
Can a router be an access point?
Yes
What is Cable/DSL Modem?
It converts sound signals between analog and digital into a computer readable format
What is Optical Network Terminal (ONT)
A cable modem for fiber technology
What is ONT used for?
To convert signals from optical to electrical and vice versa
Where does ONT sit?
Between your ISP (internet service provider) and your Ethernet device
What is the Network Interface Card (NIC)
Used to connect a device to a network
What is a patch panel?
Device with multiple ports that acts as a central organized connection point for network cables
What is Power over Ethernet (PoE)?
A feature that allows electrical power to be sent over Ethernet connection.
Where is the PoE capability often found?
On a switch or PoE injector
What type of devices use PoE?
Surveillance cameras, alarm systems, Wireless Access Points, Laptop Screens
What is the goal of a firewall?
Filter traffic by port number or application. Blocks bad traffic.
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Networking104
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Networking Hardware26
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Network Types16
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Protocols for Wireless Networking57
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Networked Hosts and their Services26
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Network Troubleshooting Tools11
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Basic Home and Small Business Network11
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Laptop Hardware and Components14
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Mobile Device Displays16
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Accessories and Ports38
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Network Connectivity11
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App Support and Synchornization21
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Internal Hardware Components55
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Cables, Interface Connectors. and Power62
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Storage and Memory50
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Printers and multifunction devices15
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The Troubleshooting Methodology12
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Solving common issues21
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Port Revision16
