Computer Communication Network ( 10EC71) - Question Bank

Computer Communication Network ( 10EC71) - Question Bank

Computer communication network ( 10EC71)

1.       With Layer diagram explain the responsibility of each layer in OSI Model (09 Marks) Dec/Jan 2017

2.       Explain the operation of ADSL using discrete multitone modulation with neat diagram (06 Marks) Dec/Jan 2017

3.        List different types of addressing in TCP.Explain any one type of addressing with suitable example (05 Marks)  Dec/Jan 2017

4.       Mention the layers of TCP/IP protocol suite and give brief explanation of protocols used in the suite (10 Marks) June/July 2015

5.       Explain the usage of existing loops, adaptive technology and discrete multitone technique in ADSL (10 Marks) June/July 2015

6.       Discuss the TCP/IP model with functionalities of each layer. Consider source destination and intermediate modes of discussion (10 Marks) Dec/Jan 2015

7.       Explain the different services provided by telephone networks (4 Marks) Dec/Jan 2015

8.       Describe four levels of addressing used in internet (TCP/IP) with examples (6 Marks) Dec/Jan 2015

9.       How do the layers of TCP/IP model correlate to the OSI model (8 Marks) Dec/Jan 2014

10.    Explain about IXCs with the schematic. What is point of presence (6 Marks) Dec/Jan 2014

11.    How ADSL could achieve higher data rate over existing local loops? Explain DSLAM.(6 Marks) Dec/Jan 2014

12.    Describe the layer presentation in the TCP/IP model and explain the protocol of each layer (8 Marks) June/July 2014

13.    What is ADSL? Explain the operation of ADSL using discrete multi tone modulation with a neat diagram (8 Marks) June/July 2014

14.    List diagram type of addressing .Explain any one type of addressing with suitable example (4 Marks) June/July 2014

1.      

UNIT2: DATA LINK CONTROL: Framing, Flow and error control, Protocols, Noiseless channels and noisy channels, HDLC.

Distinguish character stuffing and bit stuffing with an example.(04 Marks) Dec/Jan 2017

2.       Explain different HDLC frames.(06 Marks) Dec/Jan 2017

3.       What are sliding window protocols? Design G0-Back and ARQ Protocol for noisy channel.(10 Marks) Dec/Jan 2017

4.       Give design of selective repeat ARQ, and explain its working at sender site and receiver site.(10 Marks) June/July 2015

5.       Give frame format of HDLC protocol and explain all the fields in the frame.(10 Marks) June/July 2015

6.       What is HDLC?Explain different frame formats with control field used by HDLC.(10 Marks)  Dec/Jan 2015

7.       A system uses stop and wait ARQ protocol. If each packet carries 2000 bits of data, how long does it take to send 1 million bits of data if the speed is 2x  m/sec?Ignore transmission ,waiting and processing delays. We assume no data or control frame is lost or damaged .Repeat for go-back-n with a window size=7.(10 Marks)  Dec/Jan 2015

8.       With a frame format ,give an elaborate account on HDLC.(8 Marks) Dec/Jan 2014

9.       What is ARQ?Describe in detail about Go-Back-N ARQ.(8 Marks) Dec/Jan 2014

10.    Explain bit stuffing with an example.(4 Marks) Dec/Jan 2014

11.    What is framing? Explain bit stuffing with a help of a diagram.(5 Marks) June/July 2014

12.    With neat diagram, explain HDLC frame format.(5 Marks) June/July 2014

13.    Explain stop and wait automatic repeat request for noisy channel (8 Marks) June/July 2014

14.    Perform bit stuffing on a given bit stream 0001111111001111101000 assume flag as 01111110.  (2 Marks) June/July 2014

UNIT 3: MULTIPLE ACCESSES: Random access, Controlled access, Channelisation

 

1.Explain non Persistant,I-Persistant and P-Persistent

2.Explain token passing as a controlled access technique(06 Marks) Dec/Jan 2017

3.What is channelization in the context of multiple accesses? What are various   

   channelization techniques? Explain CDMA techniques.(10 Marks) Dec/Jan 2016

      4.Explain working of CSMA/CA with a flow diagram.(10 Marks) June/July 2015

5. A pure aloha network transmits 200 bit frames on a shared channel of 200kbps.What is the     through put if system produces 1000 frames per second?(4 Marks) June/July 2015

6.Explain the idea of CDMA technique.(6 Marks) June/July 2015

7.What is channelization in the context of multiple accesses? What are various channelization techniques? Explain CDMA techniques.(10 Marks) Dec/Jan 2015

8.Two stations A and C are connected to a shared channel with data rate 10Mbps.The distance  between A and C is 2500m and the propagation speed is 2x  m/s.Station A starts sending a long frame at a time t1=0;station C starts sending a long frame at a time t2=3µsec.The size of frame is long enough to guarantee the detection of collision by both stations. Find i)The time when station C hears the collision (t3); ii)Time when station A hears the collision (t4); iii)The number of bits A has sent before detecting the collision ;iv)The number of bits C has sent before detecting the collision.(10 Marks) Dec/Jan 2015

9.With a flow diagram ,explain CSMA/CD.(8 Marks) Dec/Jan 2014

10.What is channelization? Give a brief account on CDMA.(8 Marks) Dec/Jan 2014

11What are the reasons for poor channel utilization in ALOHA system? How the same is improved in CSMA.(4 Marks) Dec/Jan 2014

12.A pure ALOHA network transmits 200 bit frames on a shared channel of 200kbps.What is the throughput if system produces i)1000 frames per second; ii)500 frames per second.(4 Marks) June/July 2014

13. Explain 1-persistent,non-persistent and p-persistent with flow diagram.(6 Marks) June/July 2014

UNIT4:Wired LAN, Ethernet, IEEE standards, Standard Ethernet. Changes in the standards, Fast Ethernet, Gigabit Ethernet, Wireless LAN IEEE 802.11

1.Explain addressing mechanism used in IEEE 802.11.(6 Marks) Dec/Jan 2017

2.Explain standard Ethernet physical layer implementation of 10 base2 10 base5 (6 Marks)    Dec/Jan 2017

3.Explain frame format of Ethernet MAC frame.(8 Marks) June/July 2015

4.Describe topology, implementation and encoding in fast Ethernet.(8 Marks) June/July 2015

5.Give summary of standard Ethernet implementations.(4 Marks) June/July 2015

6.Explain the MAC frame format of IEEE 802.3.Write a note on frame length.(10 Marks) Dec/Jan 2015

7.Explain the features of MAC sub layer and physical layer of Gigabit Ethernet.(10 Marks) Dec/Jan 2015

8.What are the reasons for not implementing CSMA/CD in wireless LANs?With a flowchart  and frame exchange time line diagram, explain CSMA/CA.(8 Marks) Dec/Jan 2014

9What are the advantages of having a Bridged Ethernet?(6 Marks) Dec/Jan 2014

10.List goals of fast Ethernet Enumerate Fast Ethernet implementations.(6 Marks) Dec/Jan 2014

11.Explain frame format of 802.3 MAC frame.(6 Marks) June/July 2014

12. Define the type of the following destination address and justify answer

          i) 4A:30:10:21:10:1A      ii) 47:20:1B:2E:08:EE   (4 Marks) June/July 2014

     13.Explain bridge Ethernet, switched Ethernet, full duplex Ethernet.(10 Marks) June/July  2014

UNIT5:Connecting LANs, Backbone and Virtual LANs, Connecting devices, Backbone Networks, Virtual LANs

1.       Explain spanning tree algorithm with graphical representation (10 Marks) Dec/Jan 2017

2.       Compare IPV4 and IPV6 extension headers(06 Marks) Dec/Jan 2017

3.       Describe the three steps involved in finding spanning tree for the following system fig.Q5(a)

  (10Marks)June/July 2015

4.       Discuss the two most common architectures in backbone networks.(10 Marks) June/July 2015

5.       Briefly explain the three criteria's of a transparent bridge with example.(10 Marks) Dec/Jan 2015

6.       Explain the following connecting devices : i)Passive hub, ii)Repeater , iii)Bridge ,iv)Router)Gateway(10 Marks) Dec/Jan 2015

7.       List different connecting devices on the basis of layers they operate.(4 Marks) Dec/Jan 2014

8.       Discuss about looping problem in transparent bridges. How spanning trees help avoid looping problem?(8 Marks) Dec/Jan 2014

9.       What are virtual LANs? What is the basis for membership in VLAN? Enumerate advantages of having VLANs? (8 Marks) Dec/Jan 2014

10.    Explain what is  loop problem and solution for a loop problem in a bridge with suitable example and diagrams.(10 Marks) June/July 2014

11.    Explain bus backbone and star backbone networks(6 Marks) June/July 2014

12.    What is VLAN? Explain briefly.(4 Marks) June/July 2014

UNIT6:Network Layer, Logical addressing, Ipv4 addresses, Ipv6 addresses, Ipv4 and Ipv6 Transition from Ipv4 to Ipv6.

1.       Describe three strategies devised by IETF to help transition from IPV4 to IPV6(10 Marks) Dec/Jan 2017

2.       Explain classful addressing classes in IPV4.(10 Marks) June/July 2015

3.       Explain the different fields of IPV4 datagram.(10 Marks) June/July 2015

4.       What is NAT?Explain how address translation is done in NAT?(9 Marks) Dec/Jan 2015

5.       Why IPV4 to IPV6 transition is required? What are various techniques used in transition?Explain them. (8 Marks) Dec/Jan 2015

6.       Bring out any 3 difference between IPV4 and IPV6 addressing schemes.(3 Marks) Dec/Jan 2015

7.       Write a detailed account on IPV6 addresses. Expand the address 0:15::1:12:1213.(10 Marks) Dec/Jan 2014

8.       Explain fields pertaining to Fragmentation in IPV4 header.(6 Marks) Dec/Jan 2014

9.       In an IPV4 packet the value of HLEN is 5 and the value of total length field is 0x0028.How many bytes of data are being carried by this packet?(4 Marks) Dec/Jan 2014

10.    What is NAT? Explain how NAT help in address depletion.(5 Marks) June/July 2014

11.    Explain IPV4 diagram.(5 Marks) June/July 2014

12.    Explain class full addressing for IP address.(5 Marks) June/July 2014

UNIT 7:Delivery, Forwarding, Unicast Routing Protocols, Multicast Routing protocols.

1.       Write short notes on Forwarding Process, Address aggregation and Dynamic routing table(15 Marks) Dec/Jan 2017

2.       What are the basis for classification of four types of links defined by OSPF(05 Marks) Dec/Jan 2017

3.       Explain initialization, sharing and updating in distance vector routing protocol.(10 Marks) June/July 2015

4.       Discuss multicasting distance vector routing and its implementation in DVMRP.(10 Marks) June/July 2015

5.       Explain distance vector routing with an example.(10 Marks) Dec/Jan 2015

6.       Compare multicasting and multiple unicasting .Discuss multicast distance vector routing.(10 Marks ) Dec/Jan 2014

7.       What are autonomous systems? Categorize autonomous systems. Give a brief note on BGP sessions.(6 Marks) Dec/Jan 2014

8.       Mention the different fields in a typing routing table. What are the significance of Flags field?(4 Marks) Dec/Jan 2014

9.       With suitable diagram explain distance vector routing.(10 Marks) June/July 2014

10.    Explain different solution to two-node instability.(5 Marks) June/July 2014

11.    Explain source-based tree and group shared based tree.(5 Marks) June/July 2014

UNIT8:Transport layer Process to process Delivery, UDP, TCP, Domain name system, Resolution.

1.       With regards to DSN in internet Explain briefly recursive and iterative resolution, Query and response messages(08 Marks) Dec/Jan 2017

2.       Explain UDP datagram format(4 Marks) June/July 2015

3.       Describe three way hand shaking connection establishment and termination in TCP(8 Marks) June/July 2015

4.       Mention at least five generic and country domains and explain recursive and iterative resolution.(8 Marks) June/July 2015

5.       How is TCP better than UDP?Explain services offered by TCP.(10 Marks) Dec/Jan 2015

6.       What is name space? How is it classified? What is DNS?(10 Marks) Dec/Jan 2015

7.       Explain connection establishment and connection termination in TCP.(10 Marks) Dec/Jan 2014

8.       Give user datagram format. List uses of UDP(6 Marks) Dec/Jan 2014

9.       What is FQDN? What is the need for DDNS?(4 Marks) Dec/Jan 2014

10.    Describe a TCP connection establishment using three way handshake .(10 Marks) June/July 2014

11.    Explain TCP and UDP datagram.(10 Marks) June/July 2014