BUS 237 Lecture Notes - Lecture 7: Hypertext Transfer Protocol, Critical Mass, Externality

• School: Simon Fraser University
• Department: Business Administration
• Course: BUS 237
• Professor: Zorana Svedic

Document Summary

Telecommunications = electronic transfer of data between people/machines through transmission media in one of two ways using a protocol. Types of transmission media: wired = table tv, phone/internet cables, optical fiber cables, wireless = radio waves, infrared. 2 ways to send data: analog (wavy/smooth, digital (choppy) Protocols = procedures used to transfer info between comps, must agree among comps. Connects comps in a small, single geographic location. Switch = router: network interface card (nic) = connects devices together, media access control (mac address) = unique identifier for hardware, devices = connected by cables (utp or optical fiber) Protocol: uses ieee 802. 3 (ethernet) if lan (wired, uses ieee 802. 11 (wi-fi) if wireless lan (wlan, requires nic + access point (connects to ethernet, uses ieee 802. 15 (bluetooth) if wireless personal area network, wide area network (wan) Connects comps @ different locations: uses cmns networks from vendors via cable connections (uses internet, wireless wan (wwan) = provided by wireless isp.