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7th Semester Electronic and Communication Engineering (2013-December) Question Papers

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7th Semester Electronic and Communication Engineering (2013-December) Question Papers

1. 1. O6EC7T USN Seventh Semester B.E. Degree Examination, Dec.2013 lJan.20l4 ,,: Time: 3 hrs. Max. Mark"\$100 Note: Answer FIVEfull questions, selecting at least TWO questions from each part. ai o o a PART _ A I a. b. c. 2a. o o With la:yer diagram, explain th. ,.rpo.rribFyof each layer in oSI model, (10 Marks) How daiatransfer is achieved using CM and CMIS in CATV channel? (06 Marks) Calculate fur minimum time required to download one million bits of information using each of the fuUOwing techniques: i) V.32 modem ii) V.32 bis modem iii) V.90 modem rl ,, . (04 Marks) What are the different types of framing? Explain bit stuffing with an example. (06 Marks) With design and sliding windo* diagrams, explain Go back - N ARQ protocol. (10 Marks) In a stop and wait ARQ system, the bandwidth-delay product is 20000 bits and 1 bit takes 20 ms to make a round trip. What is the B.W. of the line? If the protocol that can send 10 frames are 1200 bits in length then what is the percentage of utilizationof the link?10+ Marks) 3q 69 5 ool eca .-I .= c b?p otr -c o> o b. a-) c. 1,1 ;;I oc) 3a. 5Ai b. c. d. ,6 .r? 6) One hundred stations on a slotted ALOHA network share 1 Mbps channel. If frames are 1000 bits long, find the throughput if each station is sending 5 frames/second; (05 Marks) With flow diagram, explain.the procedure for CSMA/CD protocol. (06 Marks) Explain polling method of controlled access of the channel. (04 Marks) Describe the encoding and decoding scheme in CDMA techniques lor channel sharing. :'::::"""""' OE :9 o'' o_i ,i a= 4 a. b. c. .9. 6,i C'!o =-6 o.r >'t tr> =o a- t< * ...l I ,, "' ", b. 6a. b. 0) o o c. (05 Marks) Explain the frame formats of IEEE 802.3. What are the minimurn and maximum frame lengths? What are the characteristics of fast Ethernet? Desoribe the address mechanism of IEEE 802.11. - ,,-',,' 5 t-,+l Wlrt is transparent bridge? bo" cbo (J= =6 90 , "',, " "' PART (10 Marks) (04 Marks) (06 Marks) -B Explain the process of learning in transparent bridge. (10 Marks) What is VLAN? Explain in detail. What are the advantages of (10 Marks) VLAN? What is classful addressing in IPV4? What is its mask? Explain. Find the class of each address: i) ii) ii, 14.23.120.8 252.5.1s.1 1 1 11000001 10000011 00011011 11111111 iv) 00000001 00001011 00001011 11101111 What is network address translation (NAT)? Give the NAT imp I of2 (06 Marks)
2. 2. 06EC71 7 a. b. Explain different forwarding techniques used in network layer. Explain the distance vector routing for the graph shown in Fig.eZ(U). (10 Marks) r =% f'.::.::':::j..,. E-; u) fu_ .4,N. Fig.Q7(b) Topology ofNetwork of Network "Lffi= 'f.,r.=-* * .9" .:;':a. - ,; f ** .* E (10 Marks) % Lfp, g &-- t .*".1* 8 a. What ar6@Oitterent TCP services and features? Explain them" r*,,,q=* b. Describe l-lb.F'.-tser datagram format. # =;'i c. What are the afrytions of multicast routing? F*= 'lee (10 Marks) (06 Marks) ::: 6U t*i1*=_ ''.=,: {'{<{<*- " iol ") rvlarrrsy ,t {":=.1 * " ;;; th*' ::: al Ma: *E 1L 'i." .,i.4 -'s1S -w. \$ -:' * ! . ffi'} ;:::E ;4i*. s= ,.,,*i*3 Lh ; "!j d%, ''-t =,.''";t*-i ,,r h S- ,- r's ;i:--M w i::::.:: \$ -M d i::::: = 4-dd ,q 2 of2