6 Questions
Which type of cable carries data as light waves?
Fiber optic
Which devices are examples of intermediary devices in a network?
Routers
What type of media do devices use to communicate without cables?
Infrared
Which device is mainly used for audio/video communication in networks?
Coaxial cable
What are examples of wired media for carrying data?
Ethernet, fiber optic, coaxial
Which services are examples of uses of computer networks?
Email, instant messaging, file sharing
Study Notes
- Computers networks course session: nodes, media, and services
- Nodes: send or receive data, end devices (computers, printers, phones, cameras), intermediary devices (switches, routers, bridges)
- End devices: initiate or receive communication, examples: computers, printers, phones
- Intermediary devices: forward data between end devices, examples: switches, routers, bridges
- Media: links that carry data, wired (ethernet, fiber optic, coaxial, USB) or wireless (infrared, radio, microwaves, satellite)
- Wired media: use cables to guide data flow, examples: ethernet, fiber optic, coaxial, USB
- Ethernet cable: twisted-pair cable, comes in straight-through and crossover variations
- Fiber optic cable: carries data as light waves, fastest wired communication
- Coaxial cable: mainly used for audio/video communication
- Wireless media: devices communicate without cables, air as the medium, examples: infrared (TV remote control), radio (Bluetooth, Wi-Fi), microwaves (cell phones), satellite (GPS)
- Services: uses of computer networks, examples: email, instant messaging, file sharing, world wide web, voice-over IP, online gaming.
Learn about the key components of computer networks including nodes (end devices and intermediary devices), media types (wired and wireless), and common network services. Explore how data is transmitted between different devices and the various communication mediums used in computer networks.
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