Application Layer 1. What is job of Application Layer? 2. Which protocol is used at Application Layer? 3. What is DNS? How is works? 4. What protocols used is email? 5. Where to use SMTP protocol? 6. Where to use POP protocol? 7. What is MIME and where it is used? 8. What is difference between POP and IMAP? 9. Give the detailed sequence of events when we click on SEND button? 10. What is FTP? Which port is used by FTP? 11. What is TELNET? Which port is used by TELNET? 12. What is URL? What activities are carried out by the system when we type URL and press ENTER? 13. What all the information we have to provide in URL? 14. What is difference between stateful and stateless server? 15. Which protocol is used when we access any web page? Network Layer 16. List the activities of Network Layer. 17. What is routing? 18. Which are the major two activities Network Layer Device has to carry out? 19. Which device works at network layer? 20. What is difference between routing and forwarding? 21. What is virtual circuit network? 22. What is datagram network? 23. What is difference between virtual circuit and datagram network? 24. What is difference between static and dynamic routing? Which is better? 25. What is adaptive routing? 26. What is non-adaptive routing? 27. How shortest path routing algorithm works?
28. What is flooding? 29. Explain distance vector routing. 30. Explain link state routing. 31. What is congestion? How to control congestion? 32. What Jitter? How to control Jitter? 33. How to improve quality of service? 34. Explain leaky bucket algorithm? Why it is been used? 35. Explain token bucket algorithm? Why it is been used? 36. List protocols used at network layer. 37. What is IP address? E1CD347B is it IP address? 38. What is min. header length of IPv4? 39. What is min. header length of IPv6? 40. What is NAT? Why it is used? How it works? 41. What is range of Class A/B/C? 42. How to select class of the network? 43. What is loop back address? What is mean by loop back address? 44. What is subnet? What is subnet mask? 45. Whether IP is connection-less or connection-oriented? Transport Layer 46. Why transport layer is called End-to-End layer? 47. What is job of Transport Layer? 48. What is port? Is port logical or physical? How many max. Ports we can use? 49. What is difference between TCP and UDP? Which is better? 50. What is socket? 51. What we need to create socket? 52. Whether socket we create from client to server is Full duplex? 53. List the protocols used in transport layer.
Data Link Layer 54. What is job of Data Link Layer? 55. What is Framing? How it is done? 56. What is flow control? How it is done? 57. Explain sliding window protocol. 58. Explain stop and wait protocol. 59. Explain Go-back-n protocol. 60. Explain selective repeat protocol. 61. Explain HDLC protocol. 62. Explain PPP protocol. 63. Where we can use PPP protocol? CN Oral Question Bank 1. What is internet? Applications of internet. 2. Difference between hub & switch? 3. Explain the devices working at different layer. 4. What is ckt switching & packet switching? 5. What is DNS? Explain DNS. 6. What is domain & zone? 7. Which underlying protocol used by HTTP,FTP,TFTP, DNS,DHCP? 8. What is well known port nos. Tell any 4 well known ports. 9. What is iterative & recursive name resolution. 10. What is use of local DNS Server? What is address of it in our college? 11.What is HTTP & HTTPS? Explain it & where it is used. 12.What is web server? 13.What is persistant & non persistant connection? which connection is by default used. 14.Explain different methods used by HTTP request message. 15.What is cookies? How they are used? 16.What is proxy server or web cache? 17.Differentiate between FTP & TFTP? 18.Explain different protocols involved in e-mail transfer. 19.Why http is stateless protocol? 20.What is PUSH & PULL protocol? give examples. 21.Differentiate between IMAP & POP3. 22.What is use of DHCP? Explain different messages exchanged between DHCP client & server. 23.What is use of TElNET? 24.Explain different functions performed by transport layer.
25.What is socket? At which layer socket works. Sockets are physical or logical entity. What is socket address? 26.Explain different socket primitives for TCP & UDP. 27.What is connection oriented service at transport layer & at Network layer? 28.Explain TCP & UDP Segment in detail. 29.What is fragmentation? Explain use of it. 30.Explain two army problem? & relate it with TCP connection establishment & connection termination? 31.Explain TCP Congestion control. 32.Differentiate between TCP & UDP? Which applications use UDP? 33.What is congestion? How it different than flow control? 34.Explain Different policies of congestion control. 35.Explain different parameters for achieving QoS. 36.Explain different techniques for QoS. 37.Differentiate between leaky bucket & token bucket algo. For traffic shaping. 38.What do you mean by intergrated services & differentiated services? Give examples. 39.What is RSVP? Whether it routing protocol? 40.What is subnet? Differentiate between datagram & virtual ckt subnet. 41.What is IP? At which layer it is working? Connectionless or connection oriented? 42.Explain IPv4 Header. 43.Explain IP Address classes. 44.What is network address? 45.Differentiate between IPv4 & IPv6? 46.How IPv6 auto configuration works? 47.Explain CIDR Notation. 48.What is subnet & subnet mask? 49.Explain ARP,RARP & ICMP protocols. 50.What do you mean by routing? At which layer it is performed. 51.Explain taxonomy (classification) of routing algo. 52.Explain distance vector & link state routing. 53.Explain count to infinity problem. 54.What is foreign agent & home agent in mobile networks? 55.What is autonomous system(as). 56.Explain RIP,OSPF,BGP protocols. 57.What is ATM? 58.What is subnetting? 59.Explain any 4 linux networking commands? 60. Which are special IP addresses? Explain its use. 0.0.0.0 127.0.0.1 255.255.255.255 172.16.255.255 61. What is SCTP?
62. What is mobile IP? 63. Explain parameters of Qos. 64. Explain connection establishment & termination of TCP. 65. Explain sliding window protocol. 66. What is window? Prepared by Pratibha Wagaj