Networks Flashcards
What does ARPA stand for?
Advanced Research Projects Agency
What does ARPA do?
Early packet switching network and first to implement TCP/IP
Why did we start ARPA?
Sputnik/Space Race
Joseph Licklider
Intergalactic computer network; first connected UCLA to Stanford
1973
Metcalf developed Ethernet at Xerox parc
1982
Networking standard developed at ARPANet publicly available
1991
Tim Berners at CERN invented world wide web on NEXT computer
Circuit switching
Single uninterrupted wire connection
Packet switching
piece by piece to increase bandwidth and number of computers using it
Internet
Any set of network computers that communicate over internet protocol (TPIP)
Web
Layer on top of internet that lets you access docs linked to other docs
URL
Uniform resource locator
TLD
Top level domain (ie, .com)
HTTP
Hyper Text Transfer Protocol
Dial-Up internet access
Through existing phone lines
Digital subscriber (DSL) Lines
Copper like dial-up but for data only
Cable internet
Coaxial
Fiber
Fiber optical; sends pulses of light
Computer network
Telecommunications network which allows computers to exchange data
Network nodes
Devices that originate, route, terminate data
What does TCP/IP do?
Standard networking protocol, defines how data should travel
What does TCP/IP stand for?
Transmission control protocol/internet protocl
Router
Shares internet among multiple devices
Modem
Communicates with ISP network