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IT means information technology, including software Tech, web Tech, computer Tech, storage Tech, etc. CT means communication technology (or telecommunication technology), including wireless access system(for cell phone communication, satellite communication, etc. ), wired access system(fixed phone, wideband access, etc. ) transmission system(copper or optical: PDH, SDH, WDM, the new concept is PTN, OTN, etc. ), switch system(core network, etc. ), telecommunications is similar to Information Technology (IT), but focuses primarily on communication technologies. This includes the Internet, wireless networks, cell phones, and other communication mediums. Telecommunication is communication over a distance by cable, telegraph, telephone, or broadcasting.

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For the self-study of jam examination, one must start the preparation early. No matter if you study 5 hours instead of 8 hours, only output matters so study effectively. Stay away from all the distractions. Go for the inverse study method I mean check out previous year trends to get to know the important topics and concepts from which questions are asked. Refer the best study materials http://bit.ly/37fMfVc for preparations. To clear your concepts practice as much as possible. Solve variety of question and try to solve quality questions which have multiple concepts involved. Always try to go for the easier approach for the questions and prepare yourself not to do any silly mistake. Thanks.