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Q1. Which one of the following is not a client server application? (A) Internet chat (B) W eb browsing (C) E-mail (D)Ping C!"#" Ans$ D Explanation:  Ping is %se& for 'nowing stat%s of a host b another host$ PHYSICAL LAYER Q2.A serial transmission i %ses * information bits+ ! start bits+ # stop bit an& # parit bit foreach character$ A snchrono%s transmission ! %ses , eight bit snc characters followe& b ,"eight bit information characters$ If the bit rate is #!"" bitssecon& in both cases+ what are thetransfer rates of i an& !? (A) #"" characterssec+ #., characterssec (B) *" characterssec+ #,/ characterssec (C) #"" characterssec+ #,/ characterssec (D)*"characterssec+#.,characterssec I!""0 Ans.C Explanation: in serial transmission * bit of act%al &ata is present in *1!1#1#(2#!) bits of each transmission$ In one secon& #!"" bits are transferre&$ In #!"" bit onl #!""3(*#!) bits of act%al &ata is pr esent+ o ac t% al tr ansfe r rat e is #!""3 (* #!) 2*"" bi ts 2#" " bte s2#"" characters$ imilarl in snchrono%s transmission act%al &ata rate is2#!""3(,",,) bps2#"4" bps2#,/  btes per secon&s$ Q3. $ In the waveform (a) given below+ a bit stream is enco&e& b 5anchester scheme$ he same bit stream is enco&e& in &ifferent co&ing scheme in waveform (b)$he bit stream an& the co&ing scheme are6 (a) (b)

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