Computer Cables
Computer Cables
Computer Cables
1. USB (Universal Serial Bus)
Used to connect:
Keyboard
Mouse
Printer
External hard drives
Smartphones
Types
USB-A
Traditional rectangular connector.
USB-B
Commonly used on printers.
Mini USB
Older cameras and devices.
Micro USB
Older Android phones.
USB-C
Modern reversible connector.
Benefits:
Faster speeds
Supports charging
Supports video output
2. HDMI (High-Definition Multimedia Interface)
Used to transmit:
Video
Audio
Connects:
PCs
Monitors
TVs
Projectors
Plain Text
Computer → HDMI → Monitor
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3. DisplayPort
Used for:
High-resolution displays
Gaming monitors
Advantages:
Supports higher refresh rates
Common on gaming PCs
4. DVI (Digital Visual Interface)
Used for monitor connections.
Types:
DVI-D (Digital)
DVI-A (Analog)
DVI-I (Both)
Older than HDMI and DisplayPort.
5. VGA (Video Graphics Array)
Legacy video connector.
Characteristics:
Analog signal
Blue connector
Older monitors and projectors
6. SATA Cable
Used to connect:
HDDs
SSDs
Optical drives
to the motherboard.
Plain Text
Motherboard → SATA Cable → Hard Drive
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7. SATA Power Cable
Provides power from the PSU to:
HDDs
SSDs
DVD drives
8. Molex Connector
Older power connector.
Used for:
Older hard drives
Fans
Legacy devices
9. PCIe Power Cable
Used to power graphics cards.
Examples:
6-pin
8-pin
12VHPWR (newer GPUs)
Networking Cables
1. Ethernet (Twisted Pair)
Most common networking cable.
Connector:
Plain Text
RJ-45
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Used for:
Computers
Switches
Routers
Access points
Cat5e
Speed:
Up to 1 Gbps
Distance:
100 meters
Cat6
Speed:
1 Gbps to 10 Gbps
Better performance than Cat5e.
Cat6a
Speed:
Up to 10 Gbps
Distance:
100 meters
Common in businesses.
Cat7
Higher shielding.
Used in high-performance networks.
Cat8
Speed:
Up to 40 Gbps
Common in data centers.
2. Fiber Optic Cable
Uses light instead of electricity.
Advantages
✅ Very fast
✅ Long distance
✅ Resistant to electromagnetic interference
Types
Single-Mode Fiber (SMF)
Long-distance communication
Internet backbone
Multi-Mode Fiber (MMF)
Shorter distances
Office buildings
Campuses
3. Coaxial Cable
Used for:
Cable Internet
Cable TV
Security cameras
Connector:
Plain Text
F-Type Connector
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Special Networking Cables
Straight-Through Cable
Connects different devices.
Examples:
Plain Text
PC → Switch
Switch → Router
``
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Most modern networks use these.
Crossover Cable
Connects similar devices.
Examples:
Plain Text
PC → PC
Switch → Switch
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Less common today because most devices support Auto-MDIX.
Rollover (Console) Cable
Used to configure network devices directly.
Example:
Plain Text
Laptop → Cisco Switch Console Port
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Common for network administration.
Network Cable Connectors
Connector Used WithRJ-45 Ethernet
RJ-11 Telephone
LC Fiber Optic
SC Fiber Optic
ST Fiber Optic
F-Type Coaxial
Certification Exam Tip
Remember:
Video Cables
VGA = Analog
DVI = Digital/Analog
HDMI = Video + Audio
DisplayPort = High-performance displays
Data Cables
USB = Peripheral devices
SATA = Storage devices
PCIe Power = Graphics cards
Network Cables
Cat5e = 1 Gbps
Cat6/Cat6a = 10 Gbps
Fiber = Long distance, fastest
Coaxial = Cable TV and Internet
Easy Memory Trick
Plain Text
USB = Devices
HDMI = Monitor/TV
SATA = Storage
Ethernet = Network
Fiber = Fast Long Distance
Coax = Cable Internet
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For Network+ exams, focus most on Cat5e, Cat6, Cat6a, Fiber Optic, Coaxial, RJ-45, RJ-11, crossover, straight-through, and rollover cables, as these are tested most often.
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