| Modem | Modulates and demodulates signals for transmitting digital information | Varies (ADSL, VDSL, Dial-up, etc.) |
| Router | Connects multiple networks and forwards data packets between them | IP |
| Switch | Connects devices on a computer network by using packet switching to receive, process and forward data | Ethernet, Fibre Channel |
| Hub | A common connection point for devices in a network | Ethernet |
| Repeater | Receives a signal and retransmits it at a higher level or higher power | Varies |
| Wireless Access Point (WAP) | Allows devices to connect to a wireless network | Wi-Fi |
| Network Interface Card (NIC) | Provides a physical connection to a network | Ethernet, Wi-Fi |
| Firewall | Monitors and controls incoming and outgoing network traffic based on security policies | IP |
| Satellite Dish | Receives microwaves from communications satellites, which transmit data transmissions or broadcasts | Satellite Communication |
| Fiber Optic Cable | Transmits data as pulses of light | Optical Communication |
| Coaxial Cable | Transmits data as electronic signals | Broadband Communication |
| Ethernet Cable | Connects devices within a local area network such as PCs, routers, and switches | Ethernet |
