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Lecture 7

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

Business Administration
Course Code
BUS 237
Zorana Svedic

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Telecommunications = electronic transfer of data between people/machines through transmission media
in one of two ways using a protocol
Types of transmission media:
o Wired = table TV, phone/Internet cables, optical fiber cables
o Wireless = radio waves, infrared
2 ways to send data:
o Analog (wavy/smooth)
o Digital (choppy)
Protocols = procedures used to transfer info between comps, must agree among comps
3 major types of networks:
o Local Area Network (LAN)
Connects comps in a small, single geographic location
File/print/app server
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)
Uses IEEE 802.3 (Ethernet) if LAN (wired)
Uses IEEE 802.11 (Wi-Fi) if Wireless LAN (WLAN)
o Requires NIC + access point (connects to Ethernet)
Uses IEEE 802.15 (Bluetooth) if Wireless Personal Area Network
o 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
o Internet
Is a WAN
Needs ISP which provides router w/Internet access, serves as gateway to Internet, helps
pay for Internet
Transmission speeds = narrow vs broad band
Difference between LAN & WAN
o LAN = org can usually place CMNS lines anywhere b/c all lines reside on their property
o WAN = must contract w/a license CMNS vendor who has lines and has authority o run new lines
between multiple locations
Rules for naming websites:
o Domain names, top-level domain (.ca, .com), uniform-resource locator (URL), IP address
find more resources at
find more resources at
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