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befoundinnearlyeveryhouseholdandaconsiderablepercentageofprogrammers
focusonthisparticularsegmentoftheICTmarket.Thedevelopmentof
programminglanguagesusedincreatingwebservicesislinkedwiththeprogress
ofmobileinternettechnologies.Whileasrecentlyasafewyearsagousingthe
internetincellularphonesentailedhighcosts9mobileinternettodayiswidely
availableandratherinexpensive.
12textsdealwithObjective-Cwhichisarelativelynewprogramming
language.Objective-CisusedbyAppleindevelopingapplicationsforiOSmobile
operatingsystemsandMacOSXoperatingsystems.
Thegenrealsoincludestextsconcerningprogrammingenvironments9also
referredtoasintegrateddevelopmentenvironments(IDEs)–applications
providingcompletetoolsforprogrammerstowritesoftware.Sometextsinthe
genredealwiththefollowingprogrammingenvironments:CodeBlocksusedto
writeapplicationsmainlyinsuchlanguagesasCorC++andEclipseusedtowrite
programmesmainlyinJAVA.
TheICTgenre:‘Technicaldocumentationofnetwork
technologies’
Acomputernetworkconsistsofanumberofdevices9callednodes9which
cancommunicate.ThemainkindsofnetworksareLANsandWANs.Local-area
networks(LANs)covernodesincloseproximitytooneanother9e.g.inone
building.Wide-areanetworks(WANs)spanlargenumbersofnodesfar-apart
whicharelinkedbywires9fibre-opticcablesorwirelessconnections.Inorderto
operatenetworksrequireappropriatehardwareandsoftwareresources9i.e.network
infrastructure.
TheInternetisthebiggestWAN9aglobalsystemofcomputernetworks
whereanytwoconnectedcomputerscancommunicateusingtheInternetprotocol
suite(TCP/IP).
Thetextsinthegenrepertaintoavarietyoftopicsincludingcertainnetwork
protocols9signaltransmissiontechnologies9wirelesstechnologies9someother
advancednetworktechnologies9e.g.CloudComputing.
Aboutonethirdofalltextsinthegenrerelatedirectlyorindirectlytothe
router9apivotalnetworkingdeviceresponsibleforsendingdatabetweennetworks.
Arouteranalysestheinformationinthedatapacketheaderandforwardsthepacket
accordinglytothefollowingrouterortotherecipient.Arouterchecksthe
informationinitsroutingtablewhichisadatabaseofpathstospecificnetwork
destinationsandmetricsofparticularroutes.Aroutingmetricisavariableusedin
selectinganoptimalpathcalculatedonthebasisofhopcount9bandwidth9
reliability9latencyandsomeotherparameters.
Thetopicofwirelesslocalareanetworks(WLANs)isdealtwithinanumber
oftextsinthegenre.Wirelesslocalareanetworks(WLANs)compriseanumberof
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