E0001 Computers in Engineering Communications and Networks

Readings and Exercises u Shelly Cashman –1995 Chapter 7 –1997 Chapter 6 u Meyer... –1995 Chapter 5 –1997 Chapter 6

Data Communication Systems u electronic systems u transmit data u communication lines u network u LAN - local area network

Connectivity u Microcomputers require modems to send and receive messages over telephone lines u modem - modulator- demodulator u speed measured in baud rate u types of modems –external –internal –wireless –fax

Communication Channels u telephone lines u coaxial cable u fiber optic cable u microwave u satellites

Data Transmission u bandwidth u serial vs parallel transmission u direction of flow u modes of transmission u protocols

Network Architecture u Computer Network is.. u Network architecture describes.. u Terms –node –client –server –Network operating system –distributed processing –host computer

Network Configurations u star u bus u ring u hierarchical

Network types u LAN u WAN

Communications u Electronic Mail ( ) u Voice Mail u Teleconferencing u FAX u Groupware u Telecommuting u Electronic Data Interchange (EDI) u Global Positioning Systems (GPS) u Bulletin Boards Systems (BBS) u Online Services

Exam Hints u Look at sample exam on Home Page –ignore questions 2 and 9 –attempt Q3,5,6,7,8 –Q6 make output graphical u know major terms –BIOS –ROM & RAM –IPOS –machine cycle –machine code –MIP –compete readings in table

Common Errors u syntax of select case u write and read title from a file u revise EOF and DO LOOPS u known number of loops use FOR NEXT loops u revise relational and logical operators especially wrt select case and IF THEN u manipulation of 2 dimensional arrays u closing file when finished