Comptia A+ 1101 2.2 Course Exam Objectives
#Routers
Layer 3 Device
Use IP addresses (logical) to route traffic
Connect different networks
#Switches
Layer 2 Device
Use MAC addresses (physical)
Connect devices on the same network
Managed: Configurable
Unmanaged: Ready out of the box
Access Points
Layer 1 and Layer 2
Convert wireless signals to wired signals and vice versa
SSID broadcasting and data transmission
Patch Panel
Layer 1
Organization and management of cables
#Firewall
Layer 3, 4, 7 (advanced)
Implements rules for network traffic, both incoming and outgoing
Types: Hardware, Software, Network, Host, Cloud
Methods: Packet Filtering, Stateful Inspection, Proxy
Power over Ethernet (#PoE )
Layer 1, 2, 3
Power transmission over Ethernet, usually for IP phones
Injectors: Used for non-PoE switches
Standards: IEEE 802.3af, IEEE 802.3at, IEEE 802.3bt
Hub
Layer 1
Old school switch with less technology
Half-Duplex
Broadcasting
No intelligence
Cable Modem
Layer 1, 2, 3
Converts Internet data to coaxial cable and then to Ethernet
Typical for home and small business
Provided by ISP, often includes multiple functions
Optical Network Terminal (ONT)
Layer 1, 2, 3
Converts fiber-optic signals to electrical signals for LAN devices
Connection: ISP – FOC – ONT – Ethernet
Network Interface Card (NIC)
Layer 1, 2
Hardware allowing a device to connect to a network
Types: Wired, Wireless, Fiber, Integrated
Software Defined Network (SDN)
Layer 3, 4, 7
Networking approach managed via software
Components: Controller, Data Plane, Control Plane
#CompTIA #CompTIAPlus #CompTIA2201101 #ITCertification #TechTraining #ITFundamentals #CompTIAExamPrep #Networking
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