CS2060 - High Speed Networks Question Bank

CS2060 – High Speed Networks Question Bank VII Sem. ECE CS2060- HIGH SPEED NETWORKS UNIT I Frame Relay Networks Unit I Part A 1.1. Differentiate frame relay from X.25 packet switching services. ( Nov./Dec.2012, Nov./Dec. 2008, Nov./Dec.2007). 1.2. Frame relay networks are faster than X.25 networks. Justify this statement. ( April/ May 2008) 1.3. List any four important features of frame relay networks. ( Nov./Dec. 2009) 1.4. What are the data link control functions provided by LAPF protocol. ( May/ June 2008) 1.5. Write the frame format of frame relay. ( Nov./Dec. 2010). 1.6. What are the planes in protocol reference model? 1.7. List the types of frame relay messages. ( Nov./Dec 2008) 1.8. What is meant by virtual circuit? ( Nov./Dec.2009) 1.9. Distinguish between frame relay and ATM. ( May/June 2009) 1.10. What is switching? State the switching technique used in ATM networks. 1.11. Define – Cell Switching ( April/ May 2008) 1.12. List few applications of ATM. ( Nov./ Dec 2011) 1.13. What is meant by Asynchronous in ATM networks? ( Nov./Dec.2009) 1.14. What is a cell in ATM? 1.15. What is the need for AAL? ( Nov./ Dec. 2207) 1.16. What are the services of ATM? 1.17. What are the services offered by AAL? 1.18. What is a jitter? 1.19. What are the differences between Class A and Class B services offered by ATM? ( May/June 2004) 1.20. Differentiate ATM bearer service from other bearer services. ( Nov./Dec.2010) 1.21. What is the need for high speed LAN? (April/ May 2014) 1.22. List the encoding techniques followed in fast Ethernet. ( Nov./Dec.2009) 1.23. Compare the data rate and speed of fast Ethernet with Gigabit Ethernet. 1.24. List the advantages and disadvantages of Wireless LAN. ( April/May 2010) Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 1 CS2060 – High Speed Networks Question Bank VII Sem. ECE 1.25. What are the uses of wireless LAN? ( May/ June 2008) 1.26. What is the access method used by wireless LAN? ( Nov./ Dec.2008) 1.27. List out some of the control functions of LAPF core. 1.28. What is VPI? 1.29. What is CLP? 1.30. What are the services of ATM? 1.31. What is the message types needed for Frame relay call control? 1.32. What is SNP? 1.33. What are the benefits of 10 Gbps Ethernet over ATM? 1.34. What is the purpose of Fiber channel? 1.35. What are the IEEE 802.11 services? 1.36. What are the physical Medias defined in 802.11? 1.37. Define - Cell lose ratio 1.38. Define- Cell transfer delay 1.39. Define - Cell delay variation tolerance 1.40. Define - Sustainable cell rate. 1.41.Define- peak cell rate UNIT I- PART B 1.42. Explain the physical layer access mechanisms, MAC layer protocol and the MAC layer frame format for wireless LAN 802.11 ( Nov./Dec 2008) 1.43. Write short notes on: Gigabit Ethernet and fast ether net. ( Nov./Dec 2008) 1.44.Draw the NNI and UNI ATM header cell format and explain the significance of each field. ( Nov./Dec 2008) 1.45.Describe the architecture of 802.11. ( Nov./Dec 2007) 1.46.what are the services provided by ATM adaptation layer? Explain the operation of various protocols. ( Nov./Dec 2007) 1.47.What are the major strengths of fibre channel? Explain. ( Nov./Dec 2007) 1.45.Describe the various requirements of specific to wireless LAN. ( April/May 2008) 1.46.Explain the call establishment process using virtual channels and virtual paths. Describe the characteristics of virtual channels. ( April/May 2008) 1.47. Compare X.25 and frame relay protocol stacks. ( April/May 2008). 1.48. Describe the features of Gigabit Ethernet. ( April/May 2008) 1.49.Explain the fibre channel protocol architecture. ( April/May 2008) Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 2 CS2060 – High Speed Networks Question Bank VII Sem. ECE Unit II Congestion and Traffic Networks UNIT II- PART A 2.1. When will queue be formed in a network? 2.2.State the key characteristics to be considered for deriving the analytic equations for the queuing model. ( Nov./Dec. 2011) 2.3. What are the types of queuing models? ( April/ May 2010) 2.4. List the various queuing models and its applications. ( May/June 2009) 2.5. List any four important parameters associated with a single server queue. ( Nov./Dec.2009) 2.6. List te parameters for a single server queue. ( Nov./Dec.2012) 2.7. List any four queuing models used to measure the performance of networks. ( April/ May 2008) 2.8. Define mean residence time. ( Nov./Dec 2008) 2.9. Write short notes on Little’s formula. ( Nov./Dec. 2007, 2009) 2.10. Write the kendall’s notation. 2.11.Compare multi server with multiple single server queues. ( Nov./ Dec.2007) 2.12. Define Congestion 2.13. What are the causes for congestion? ( may/June 2009), (April/May 2010) 2.14.List the different congestion control techniques. 2.15.What is meant by choke packet? ( Nov/Dec 2011) 2.16. What is the role of end-to-end probe packet in congestion control? ( Nov/Dec 2009) 2.17. Define back pressure 2.18. Define- FECN 2.19. What are the drawbacks of Backpressure? ( May/June 2009) 2.20. What is meant by BECN? ( Nov/Dec 2012) 2.21. What is meant by explicit congestion signaling? 2.22. What is implicit congestion signaling? ( Nov/Dec 2010) 2.23. List some of the model characteristics. 2.24. Difference between multiserver queue and multiple single server 2.25. Define: Mean residence time 2.26. What is Discard Strategy? 2.27. List the congestion control mechanism in packet switching networks. 2.28.What is Congestion Avoidance? 2.29. What is Congestion recovery? Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 3 CS2060 – High Speed Networks Question Bank VII Sem. ECE 2.30. What is committed information rate (CIR)? 2.31. Write the Little’s formula and explain its uses. (AU:Nov/Dec 2007) (AU:may/june 2008) 2.32. Compare multi server and multiple single server queues. (AU:Nov/Dec 2007) 2.33. What are the drawbacks of Backpressure? (AU:may/june 2009) 2.34.What are the causes for congestion? (AU:may/june 2009) 2.35. When queue will be formed in a network? 2.36. What are the characteristics of queue process? 2.37.What is meant by congestion avoidance? 2.38. Defin: Access rate. 2.39. Define: Excess burst rate (Be). 2.40. Define: Coefficient of variation UNIT II- PART B 2.1. What is kendel’s equation. State the equations single server that follows the M/G/1 model. (8) ( Nov./Dec 2007) 2.2. Explain any four congestion control mechanism used in packet switching techniques. (8)(Nov./Dec 2007) 2.3. Describe the effects of congestion. Explain the various congestion control techniques. (8) ( Nov./Dec 2007), (8) ( May/June 2009) 2.4. Explain the need for queuing analysis. (8)( Nov./Dec 2007) 2.5. Explain the explicit congestion control technique, classify explicit congestion control approach and explain. (8)( April/May 2008) 2.6.Discuss the various issues related to congestion control in a network. (8)( April/May 2008) 2.7.Explain the various frame relay congestion control techniques. (8)( April/May 2008) 2.8.What is the fundamental task of queuing analysis? What are the different ways of developing a queuing model? Explain how analysis is done for various models. 2.9. What are open loop and closed loop congestion control? (8)( April/May 2008) (6)(Nov./Dec 2008) 2.10.Explain M/M/1 and M/D/1 queuing model and derive expression for (16) (Nov./Dec 2008)    Waiting time in queue ( Tw) Waiting time in the system(Tr) Number of customers in the queue. (w) Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 4 CS2060 – High Speed Networks Question Bank VII Sem. ECE 2.11. What is the need for queuing analysis? Write the significance with queuing model (8) ( May/June 2009) 2.12. Explain the various mechanisms for congestion control in packet switching networks. (16)( May/June 2009) 2.13. Discuss the issues of fairness, quality of service and reservations in traffic management. (6)( Nov./Dec 2009) UNIT III TCP AND ATM CONGESTION CONTROL UNIT III- PART A 3.1.List the various retransmission strategies in the implementation of TCP. 3.2.What is meant by self-clocking? 3.3.What is meant by binary exponential back off? ( Nov/ Dec 2012) 3.4.What do you mean by window-limited mode? 3.5What do you mean by rate-limited mode? 3.6What is meant by source traffic descriptor? 3.7.What are the characteristic captured by the ATM Traffic Descriptor? 3.8.Define: peak cell rate 3.9.Define: sustainable cell rate 3.10.Define: Maximum burst size 3.11.Define: Minimum cell rate 3.12.Define: Maximum frame size. 3.13.Define: Cell delay variation tolerance 3.14.Define: Cell loss ratio. 3.15.Define: Traffic policing 3.16.Define: Traffic shaping 3.17.What is meant by open loop control? 3.18.What is meant by closed loop control? 3.19.List the parameters for the rate of transmission of cells. Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 5 CS2060 – High Speed Networks Question Bank VII Sem. ECE 3.20.Define: Fair share. 3.21. State the conditions that must be met for a cell to conform. (AU: Nov/Dec 2007) 3.22. What are the retransmit policies used in TCP traffic control? (AU: Nov/Dec 2007) 3.23. Why congestion control is difficult to implement in TCP? (AU: April/may 2008) 3.24. Define sustainable cell rate. What is the use of SCR? (AU: April/may 2008) 3.25. What is protocol? Give two examples. (AU: May/June2009) 3.26. Give the significance of timer management in networking. (AU: May/June2009) 3.27. What are the mechanisms used in ATM traffic control to avoid congestion condition? 3.28. How is RTO useful to control congestion in TCP? 3.29. Define Reactive Congestion control. 3.30. What is the use of Preventive congestion control? 3.31. What is the difference between flow control and congestion control? 3.32. What is meant by silly window syndrome? 3.33. What are the mechanisms used in TCP to control congestion? 3.34. Define Behavior class selector (BCS). 3.35. What is meant by allowed cell rate (ACR)? 3.36. List the three fields in the TCP header. 3.37. What is meant by closed loop control in ABR mechanism? 3.38. What is meant by open loop control in ABR mechanism? 3.39. Define cell insertion time. 3.40. List the ATM traffic attributes. 3.41. Define flow Control 3.42.State the significance of window size in TCP. 3.43. What are the various retransmission strategies used in TCP flow control? ( Nov/ Dec 2010) 3.44. What is meant by credit allocation scheme? ( Nov/ Dec 2011) 3.45. Explain the mechanism available for supporting guarantees in an ATM GFR service. ( Nov/ Dec 2011) 3.46.What is meant by allowed Cell Rate (ACR)? UNIT III- PART B 3.1. Write notes on TCP over ATM. (8)( Nov./Dec 2007) 3.2.Discuss the implementation issues related to TCP flow control. (8) ( Nov./Dec 2007) Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 6 CS2060 – High Speed Networks Question Bank 3.3.Discuss the various issues related to ABR traffic management. VII Sem. ECE (8) Nov./Dec 2007) 3.4. What are the ATM traffic parameters and QOS parameters defined by ATM forum? Explain. (8) ( Nov./Dec 2007) 3.5. What are the parameters that form the GFR traffic contract? Explain the different mechanisms that support rate guarantees. (8)( April/May 2008) 3.6. Explain the various techniques used in window management of TCP. (8) ( April/May 2008) 3.7. Explain the various techniques used for managing retransmission time TCP. (8) ( April/May 2008) 3.8.Explain the generic cell rate algorithm with the help of a flow chart. (8)( April/May 2008) 3.9.Explain the retransmission timer management techniques used in TCP and also explain the window management techniques used in TCP for congestion control. (16) (Nov./Dec 2008) 3.10.Briefly explain the different types of traffic control functions used in ATM networks to maintain the promised QOS parameter. (16) (Nov./Dec 2008) 3.11. Explain KARN’s algorithm. (6)( May/June 2009) 3.12.Explain TCP traffic Management. (16)( May/June 2009) 3.13 Discuss the ABR and GFR service categories in ATM networks (8)( Nov./Dec 2009) 3.14. Explain the additive increase multiplicative decrease behavior of TCP congestion control mechanism. (8)( Nov./Dec 2009) 3.15. Explain the basic TCP flow control mechanism in detail. (8)( Nov./Dec 2009) UNIT IV INTEGRATED AND DIFFERENTIATED SERVICES UNIT IV PART A 4.1.What are the requirements for inelastic traffic? 4.2.What are the functions that are provided by ISA to manage congestion and QoS transport? 4.3.What are the principal background functions of ISA? Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 7 CS2060 – High Speed Networks Question Bank VII Sem. ECE 4.4. What are the services provided by ISA? 4.5. What are the different queuing techniques? 4.6. Define: RED 4.7. State the design goals of Random Early Detection 4.8. What are the different types of Traffic? 4.9. List out the advantages of ISA. 4.10. Define: Behavior Aggregate 4.11. Define Classifier 4.12. Define: Marking 4.13. Define Dropping 4.14. Define: Metering 4.15. Define: Shaping 4.16. What is traffic conditioning? 4.17. What is Traffic conditioning Agreement? 4.18. Draw the format of DS field. 4.19. Draw the format of IPV4. 4.20. What are the elements of Traffic Conditioning function? 4.21. What is elastic traffic? (AU: Nov/Dec2007) 4.22. What are the key elements of controlled load service? (AU: Nov/Dec2007) 4.23. What are the drawbacks of FIFO queuing discipline? (AU:April/May2008) 4.24. What is an inelastic traffic? What are the requirements for inelastic traffic? (AU:April/May2008) 4.25 What is meant by rate control? Give examples. (AU:May/June2009) 4.26. What is label stacking? (AU:May/June2009) 4.27. Define delay jitter. 4.28. What is meant by best effort service? 4.29. What is meant by guaranteed service? 4.30. Define global synchronization. 4.31. What are the design goals of RED algorithm? 4.32. Define: Behavior aggregate in per hop behavior 4.33. Define: DS code point. 4.34. What is meant by traffic conditioning agreement? 4.35. Define: DS boundary node. Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 8 CS2060 – High Speed Networks Question Bank VII Sem. ECE 4.36. Define DS interior node. 4.37. Define: DS node. 4.38. What is meant by differentiated service? 4.39. What is meant by integrated services? 4.40. List the features of Integrated Services. (AU:April/May2010) 4.41. What are the components of Integrated services? 4.42.Define- Quality of service in a data network (AU:April/May2009) 4.43.List the limitations of WFQ qeuing discipline. (AU:April/May2010) 4.44. State the performance parameters that should be used in the SLA for a DS document. (AU:Nov./Dec.2012) 4.45.List the types of PHBs for differentiated services. (AU:Nov./Dec.2011) UNIT IV- PART B 4.1. Explain the various queuing disciplines used in ISA implementation.(8)( Nov./Dec 2007) 4.2.Explain different types of PHB. (8)( Nov./Dec 2007) 4.3.What are the design goals of RED? Explain RED algorithm in detail.(8) ( Nov./Dec 2007) (8)( April/May 2008) (6)( Nov./Dec 2009) 4.4.What are the components of ISA? Explain. (8)( Nov./Dec 2007) 4.5.Explain the services provided by ISA and DS. (9)( April/May 2008) 4.6.Explain the Bit- round fair queuing (BRFEQ) discipline and compare with PS (7)( April/May 2008) 4.7.Explain fair queuing and weighted fair queuing using an example. (8)( April/May 2008) 4.8. Write short notes on the following queue discipline. (16) (Nov./Dec 2008)    Fair queuing(FQ) Bit round fair queuing(BRFQ) Weighted round fair queuing(WRFQ) 4.9.Explain how random early detection is used to control congestion in networks. (16) (Nov./Dec 2008) 4.10. Discuss the approach, components of integrated service architecture. (10)( May/June 2009) 4.11. Explain the following in detail. (i) BRFQ (ii) WFQ. (8)( May/June 2009) 4.12.Discuss the approach, components of integrated service architecture. (10)( May/June 2009) 4.13.compare Integrated and Differentiated service with example. Prepared by A.Devasena., Associate Professor., Dept/ ECE (6)( May/June 2009) Page 9 CS2060 – High Speed Networks Question Bank VII Sem. ECE 4.14. Explain the RED algorithm in terms of the estimation of queue size and determining packet discard. (8)( Nov./Dec 2009) 4.15.Describe the functional modules that should be present in ingress and egress of differentiated services network. (8)( Nov./Dec 2009) 4.16. Describe tge components of a core router of differentiated services network. (8)( Nov./Dec 2009) UNIT-V PROTOCOLS FOR QoS SUPPORT UNIT V PART A 5.1.What is meant by soft statein RSVP? ( AU: Nov./Dec.2012) 5.2.Define: Channel-changing capability. 5.3.What are the characteristics of RSVP? 5.4.Define: A session. 5.5.Define: Flow descriptor. 5.6.What is reservation attribute? 5.7.What is sender selection? 5.8.Define: Wild-card-filter style 5.9.Define: Fixed-filter style 5.10. Define: Shared-explicit style 5.11. List the requirements for connection-oriented QoS support. 5.12. What is traffic engineering? (AU: Nov./Dec. 2011) 5.13. Define: Label switched routers. 5.14.Draw the MPLS label format. 5.15. What is hop-by-hop routing? 5.16. What is explicit routing? 5.17. Define: Constraint-based routing algorithm. 5.18. What is a translator? 5.19. What are the fields in RTP fixed header? 5.20 What are the functions performed by RTCP? Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 10 CS2060 – High Speed Networks Question Bank VII Sem. ECE 5. 21. What is meant by soft state in RSVP? 5. 22. Why receiver is responsible to initiate reservation in RSVP? 5. 23. Define: Session in RSVP 5.24. Define: Flow specification in RSVP 5.25. Define: Filter specification in RSVP 5.26. What are the types of reservation style used in RSVP? 5.27. What do you mean by label merging and frame merging? 5.28. Define label swapping in MPLS. 5.29. Define Label switched hop in MPLS. 5.30. What is meant by ingress edge and egress edge in MPLS domain? 5.31. List the characteristics of MPLS. 5.32. Define: MPLS 5.33. Define: Label switched router in MPLS 5.34. What is the purpose if time to live field in label format? 5.35. What is meant by integrated layer processing in RTP? 5.36. What is the function of RTP relays and give its types? 5.37. What is the function of mixer in RTP? (AU: Nov/Dec 2007) 5.38. What is wild card filter style? (AU: Nov/Dec 2007) 5.39. What is the use of translator in RTP? (AU: April/may 2008) 5.40. Mention the protocol used for congestion control. (AU: May/June 2009) 5.41. What is RTP? Discuss with examples. (AU: May/June 2009) 5.42. Explain the reservation attributes and styles of the RSV protocol ( AU: Nov./Dec.2011) 5.43. What are the goals of RSVP? (AU: April/May 2010) 5.44. State the need for data transfer Protocol. UNIT V- PART B 5.1. What are the functions that are performed by RTCP and explain RTCP transmission in Detail. (8)( Nov./Dec 2007) 5.2. Explain the reasons why TCP is not suitable for real time applications. Also explain the need for RTP. (8)( Nov./Dec 2007) 5.3. Describe the characteristics of MPLS. (16)( Nov./Dec 2007) 5.4. Explain the RSVP operation in detail. (8)( April/May 2008) 5.5.What are the different RTCP packet types defines in RFC 1889. Explain their uses in RTCP Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 11 CS2060 – High Speed Networks Question Bank transmission. VII Sem. ECE (8)( April/May 2008) 5.6.Give the RTP packet format and describe the use of each field. (8)( April/May 2008) 5.7.Explain the features of label stacking in MPLS. (8)( April/May 2008) 5.8. Draw the RTP protocol architecture and explain the concept. Also draw the RTP header format and explain the significance of each field. What are the difference between RTP and RTCP. (16) (Nov./Dec 2008) 5.9. Explain the resource reservation protocol(RSVP) operation by giving its goals and characteristics. (16) (Nov./Dec 2008) 5.10. Write in detail about the goals and characteristics of RSVP. (10)( May/June 2009) 5.11. Explain the data transfer protocol. (6)( May/June 2009) 5.12. Explain MPLS and its operation. (10)( May/June 2009) 5.13.With an example, discuss RTCP. (6)( May/June 2009) 5.14. Discuss the labeling and label switched path of MPLS networks? (8)( Nov./Dec 2009) 5.15.Explain the stacking rules followed in the label switching path of MPLS networks (8)( Nov./Dec 2009) Prepared by A.Devasena., Associate Professor., Dept/ ECE Page 12