Computer Networks Unit-wise Question Bank | Study Resources & Exam Prep SPPU CNS

Unit I

• What are different transmission modes? [4]
• Encode the following binary data stream into Manchester and differential Manchester codes: 11001010 [8]
• What are different topologies? [4]
• Explain different components required for wireless Network. [4]
• What is the need of Access Point in wireless Network? [4]
• Explain TCP/IP Reference Model. [8]
• Explain OSI reference model. [8]
• Compare TCP/IP and OSI model. [6]
• Explain fiber optics modes of propagation. [8]
• List and write the use of different network connecting devices. [8]
• What is a switch? Explain the difference between manageable and non-manageable switch. [8]
• Describe the network components (Connectors, Hubs, Switches, Repeaters, and bridges). [6]
• Explain various internetworking devices. State at which layer they work? [8]
• Differentiate between Bridge, Router and Switches. [6]
• Explain the working of Hubs, Switches and Routers. [6]
• Differentiate between Hub and Switch. [4]
• Explain the types of frequency hopping. [8]
• Give brief description of Twisted Pair Cable.
• Give brief description of Co-axial cable.
• Give brief description of Fiber Optic cable. [8]

Unit II

• Illustrate various services offered by data link layer. [5]
• What are different framing methods available? Explain any one in detail.
• If all the physical links were to provide the reliable delivery service, would the TCP reliable delivery service be redundant? Yes/No? Justify. [5]
• Compare and contrast between HDLC and PPP. [5]
• Explain PPP with phase diagram for bringing a live up. [8]
• Explain the working of PPP. [8]
• What is the overhead to send an IP packet using PPP? Count only the overhead introduced by PPP itself, not the IP header overhead. [5]

Unit III

• Differentiate between Wireless LAN (Wifi-802.3) and Bluetooth (802.15).
• Differentiate between Bluetooth (802.15) and WiMAX (802.16).
• Differentiate between different IEEE 802.11 standards (a/b/g/n/ac/ad).
• Draw and explain a frame format for IEEE 802.3.
• Draw and explain a frame format for IEEE 802.11.
• Draw and explain a frame format for IEEE 802.15.
• Binary Exponential Backoff Algorithm.
• 802.11 Architecture.
• What is Hidden station and Expose station problem in WLAN?
• Explain the need of NAV.
• Explain the working of DCF and PCF.
• Explain Bluetooth Architecture (Piconet and Scatternet).
• Explain Bluetooth (802.15) Protocol Stack.
• Explain 802.16 protocol stack.

Unit IV

• Explain network layer issues in detail. [8]
• Draw and explain IPv4 header format. [8]
• What are different features of IPV6? [6]
• What are different types of addresses in IPV6? [6]
• Explain address representation in detail of IPV6. [6]
• How is routing done in Mobile IP? [6]
• Draw and explain IPv6 header. [8]
• Explain the significance of priority and flow label fields in IPV6. [8]
• Compare IPv6 and IPv4. [8]
• Explain different types of messages in ICMP v6. [6]
• Compare IP and ICMP. [8]
• Explain header format of ICMP v6 protocol. [8]
• Describe in brief ICMP error and query messages (at least 2 each). [8]
• Identify class, subnet mask, network address and broadcast address of following IP Address: 1) 214.25.6.3 2) 191.5.8.9 3) 5.6.45.4 4) 230.45.89.63. [8]
• How do IP addresses get mapped onto data link layer addresses, such as Ethernet? [8]
• Classify routing algorithms. [4]
• Compare link state and distance vector routing algorithm. [4]
• What is path vector routing? Discuss its advantages over Distance Vector routing. [8]
• Explain routing protocols RIP and BGP. [8]
• Explain in detail OSPF protocol. [8]
• Write short note on BGP. [4]

Unit V

• Differentiate between TCP and UDP protocol. Also comment on the applications supported by them. [6]
• Explain pros and cons of TCP over UDP. [4]
• Explain SCTP packet with header in detail. [8]
• Compare SCTP, TCP and UDP. [6]
• Explain in detail different features of SCTP. [8]
• Compare SCTP and TCP. [8]
• Explain in detail different features of SCTP. [8]
• Is TCP the appropriate protocol model for wireless networks? Issues in TCP over wireless. [4]
• What are different protocols/schemes for wireless TCP? Explain any one in detail. [8]
• What is the significance of type of ports? What is the range of port numbers used in each type. [6]
• Explain flow control in TCP. [6]
• Explain significance of following flags in TCP header: SYN, RST, FIN, PSH. [6]
• Explain Three-way handshake in TCP. [4][8]
• Explain 4 scenarios for Connection release. [8]
• Explain TCP congestion control algorithm with respect to additive-increase, multiplicative decrease, slow start mechanism and reaction to timeout events. [8]
• What is Two-army problem? [6]
• What is silly syndrome problem? Suggest two solutions to overcome the problem. [8]
• Define threshold condition in congestion. How does TCP tackle congestion problem using internet congestion control algorithm? [8]
• What is 3-Way handshake in TCP? Explain in brief why it is required? [6]
• Draw UDP header structure, Explain significance of each field in UDP header. What is pseudo-header? [6]
• Explain RTP protocol in detail with header format. [8]
• Explain multiplexing and de-multiplexing in transport layer. [6]
• What is QoS? Explain QoS parameters. [8]
• Differentiate between class based and flow based QoS. Explain differentiated services for QoS. [8]
• What is Leaky Bucket algorithm? Which quality parameter is ensured by Leaky Bucket algorithm? [5]
• What is traffic shaping? How it is used in congestion control? [5]
• Describe metrics measuring QoS. [8]
• Describe any link scheduling algorithm. [8]
• Describe in brief Integrated Services and Differentiated services. [8]
• Explain significance and working of RSVP protocol. [8]
• Explain recourse reservation protocol in detail. [8]

Unit VI

• Compare file transfer using FTP and HTTP methods. [8]
• Compare FTP and TFTP and explain four commands of each. [9]
• Explain FTP in details.
• What is DNS? Explain with suitable example how query resolving process is done? [8]
• What is DNS? Explain with suitable example process of delivering of requested web page on your computer? [8]
• Write short note on SMTP and Caching in web browser. [12]
• State and explain different protocols used for e-mail. Differentiate between IMAP, POP3 and SMTP protocol. [8]
• Compare file transfer using SMTP and HTTP methods. [8]
• Explain working of DHCP.
• Explain working of TELNET.
• Assume you are accessing a web page through a browser on a computer. Explain step by step various things that happen at various layers on client side. Assume both uses TCP/IP protocol stack. [8]
• Consider you are accessing a web page. Explain what different things happen at client and server side, at each layer. Assume that both are using TCP/IP protocol stack. [8]
• Explain connection oriented and connectionless service. Which protocols at each layer in TCP/IP protocol suite support these services? [8]
• Explain TCP/IP Reference Model. [8]
• Explain OSI reference model. [8]
• Compare TCP/IP and OSI model. [6]