EXTERNAL CONNECTORS
| Connector | Devices | Description | ||
 | RJ45 | 10/100/1000Base T Networks | Registered Jack-45, an eight wire connector use for networking | |
 | BNC | 10Base2 or Thinnet | Bayonet Nut Connector use with RG58 coaxial thin cables | |
 | RJ11 | Telephone or Modem Connector | Registered Jack-11 a four or six wire connector use for Internet connections | |
 | DIN/5 | AT Keyboard | Deutsche Industrinorm connector that is use to connect an AT keyboard | |
 | PS/2 | ATX Keyboard or Mouse | Personal System 2 connector or ATX connector developed by IBM to connect an ATX Keyboard (purple) or Mouse (green) | |
 | Centronics | Parallel Printer end Connection | A standard interface for connecting parallel printer devices | |
| DB Connectors | ||||
 | Parallel Port | Parallel Devices (Printer, Scanner, External Devices and Zip Drives) | Bi-Directional ECP 8 bits wide 1.5Mbps-2.77Mbps EPP 4 bits wide 600Kbps LPT address | |
 | SCSI_50 | SCSI Devices | 3 rows use mainly by External SCSI devices | |
 | SCSI_68 | SCSI Devices | 2 rows use mainly by External SCSI devices | |
 | Analog Video Port or VGA Port | Analog Monitor Port | 3 rows with 15 holes use by CRT or LCD monitors found on video cards | |
 | Digital Video Interface Port | Digital Monitor Port | Digital Video Interface use by the newer LCD monitors found on newer graphics cards | |
 | HDMI Port | HD Signals | Use by HDTV technology 1080 or 720 most common | |
 | MIDI Port | Joystick, Game and MIDI devices | 2 rows 15 holes found on sound cards | |
 | Serial 9 Port | Serial Mouse, PDA, Modem and Digital Camera | 2 rows male 9 pins 1 bit wide transfer 57-115Kbps Backwards compatibility COM address | |
 | Serial 25 Port | Serial Modem, Printers and Scanners | 2 rows 25 pins Obsolete | |
| High Speed Connectors | ||||
 USB_A |  USB_B | USB Ports | USB Devices (Keyboards, Mouse) | 1. Hot Swappable 2. Speed USB 1.0 1.5Mbps USB 1.1 12Mbps USB 2.0 up to 480Mbps USB 3.0 up to 4.8Gbps 3. Daisy Chain 127 Devices 4. Meters Length USB 1.1 3 Meters USB 2.0 5 Meters |
 4 Pin |  6 Pin | Firewire or IEEE 1394 Ports | Firewire Devices (High Speed Multimedia Devices Video Cam or iPOD devices) | 1. Hot Swappable 2. Speed IEEE1394_a 400Mbps IEEE1394_b 800Mbps IEEE 13941600 IEEE 1394 3200 3. Daisy Chain 63 Devices |
 ST connector |  SC connector | Older Fiber Optic Ports | Fiber Optic Connections | 1. Immune to EMI 2. Very Fast 3. Can Travel great distances |
 LC connector |  MTRJ connector | Newer Fiber Optic Ports | Small Form Factor use for High Speed Fiber Optic Connections | 1. Immune to EMI 2. Speed 10Mbps up to 13.21 Gbps 3. Distance 2000 Meters up to 100Km |
 SPDIF  RCA Clickhere for the External connector quiz | ||||
