ASSIGNMENT 1 UNIT-1 DATA & COMPUTER COMMUNICATIONQue 2) Identify the five components of data communications system ? A data communications system has five components: Rule 1:Rule 2: Rulen:Protocol Protocol Rule 1:Rule 2:Rulen: SE!ER 1" #essa$e: %he messa$e is the information &data) to 'e communicated" Popularforms of information include te(t) num'ers) pictures) audio) and video"2. Sender: %he sender is the device that sends the data messa$e" It can 'e a computer)*or+station) telephone handset) video camera) and so on"," Receiver: %he receiver is the device that receives the messa$e" It can 'e a computer)-or+station) telephone handset) television) and so on"."" %ransmission medium: %he transmission medium is the physical path 'y -hicha messa$e travels from sender to receiver" Some e(amples of transmission mediainclude t-isted/pair -ire) coa(ial ca'le) fi'er/optic ca'le) and radio -aves" 0" Protocol: A protocol is a set of rules that $overn data communications" It representsan a$reement 'et-een the communicatin$ devices" *ithout a protocol) t-odevices may 'e connected 'ut not communicatin$) 1ust as a person spea+in$ 2renchcannot 'e understood 'y a person -ho spea+s only 3apaneseQue ,) *hat are the different -ays of data representation?%he different -ays of data representations are/TextRE4EI5ERIn data communications) te(t is represented as a 'it pattern) a se6uence of 'its &7s or1s)" !ifferent sets of 'it patterns have 'een desi$ned to represent te(t sym'ols" Each setis called a code) and the process of representin$ sym'ols is called codin$" %oday) thePrevalent codin$ system is called 8nicode) -hich uses ,2 'its to represent a sym'ol orcharacter used in any lan$ua$e in the -orld" Numbersum'ers are also represented 'y 'it patterns" 9o-ever) a code such as AS4II is not usedto represent num'ers: the num'er is directly converted to a 'inary num'er to simplify#athematical operations" ImagesIma$es are also represented 'y 'it patterns" In its simplest form) an ima$e is composedof a matri( of pi(els &picture elements)) -here each pi(el is a small dot" %he si;e of thepi(el depends on the resolution. 2or e(ample) an ima$e can 'e divided into 1