RJ-11
- For phone lines and telephone based Internet connections POTS
- 6 position, 2 conductor (6P2C) connector. 2 conductor means there are 2 wires in them. However, there is an RJ14 connector that looks similar. It is a 6 position, 4 conductor (6P4C), and it’s used for dual line use.
RJ-45
- 8 position, 8 conductor (8P8C) modular connector
RS-232
- RS stands for Recommended Standard
- Serial communications standard.
- Used for modems, printers, mice, networking
- Today RS-232 is commonly used as a configuration port on switch, router, or firewall.
BNC
- BNC stands for Bayonet Neill-Concelman
- Bayonet is the style: It plugs in and twists to lock.
- Most likely seen on coaxial cable connectors.
RG-59
F Connector is for cable televisions or cable modem. Need to thread the connector on. Coax connection usually RG-6 or RG-59 cable.
RG-6
USB
USB 1.0/2.0 Connectors – Standard A plug:
USB 1.0/2.0 Connectors – Standard B plug:
USB 3.0 Connectors – Standard A plug:
USB 3.0 Connectors – Standard B plug:
Micro-USB
USB 1.0/2.0 Connectors
USB 3.0 Connector:
Mini-USB
USB-C
DB-9
DB-9 is a legacy connector type. It has 9 pins. The RS-232 is a common type of DB9 connector.
Lightning
- Proprietary to Apple for iPhone, iPad, iPod
- 8 pin digital signal
- Can be used in either direction
- Higher power output than Micro USB
SCSI
SCSI is a legacy internal 50 pin ribbon cable
eSATA
Has ears on both sides and a single rectangle in the middle
Molex
- 4 pin peripheral power connector
- Provides 12 V And 5 V power.
For a flashcard review of the different connector types view the quizlet here.
