Informationnetworkinghasemergedasamultidisciplinarydiversifiedareaofresearchover
thepastfewdecades.Fromtraditionalwiredtelephonytocellularvoicetelephonyandfrom
wired access to wireless access to the Internet, information networks have profoundly
impactedourlifestyle.Atthetimeofwriting,over3billionpeoplearesubscribedtocellular
services and close to a billion residences have Internet connections.
