Nt1310 Unit 7

LECTURE 7 * What 3 things must be present for communication to occur? * Transmission media, data transmission, cooperation * Define Bandwidth * Amount of data can be transferred from one point to another in a certain time * Define attenuation * Loss of power in a signal as it travels from sending device to receiving device * What is a protocol and why is it important in electronic communication? * Rules governing data communication including error detection, message length, speed * What is the difference between a switch and a router? * Modem – Modulator Demodulator. Connects user to internet. Not required for wifi * Switch – main linking device within a network * Distinguish between main two
DMZ? * Extranet – uses internet and web tech to connect intranets to business partners. Supply chain systems. * DMZ – demilitarized zone, are of network that’s separate from the organizations LAN. Between intra and extra. * Interorganizational system? Types of IOS? * IOS – Electronic funds transfer (EFT). Electronic data interchange (EDI). XML. Radio frequency identification (RFID)

LECTURE 9 – E-COMMERCE * Network externalities? Identify when important in e-commerce. Other names for this? Difference between positive and negative externality? * * Distinguish e-business and e-commerce * E-business – Activities companies perform for selling and buying products/services, using computers and communication technologies * E-commerce – Buying and selling goods and services over the internet * 4 supporting activities and 5 primary activities of Porter’s Value Chain? * * Discuss 3 advantages and disadvantages of e-commerce compared to traditional commerce * Improved customer service * Increasing flexibility, customer involvement * More information * Around the clock operations * Better