SYBCS: Computer Networks 1 : PYQ

Chapter 1: Introduction to Network and Network Models

1 mark

Q. Which topology requires a multipoint connection ?

Q.  Give the diagrammatic representation of Mesh Topology.

Q. Define mesh topology.

Q. Write any two advantages to star topology.

- -Q. List 4 application Layer Protocol.

Q. "UDP is Connection Oriented Protocol." State the statement is true / false.

Q. What is the function of Presentation layer?

--Q. What is Protocol? with its key elements.

--Q. Which devices operates at physical layer.

-Q. Write disadvantages of star topology.

Q. For n devices in a network, what is the number of cables required for ring topology.

4 mark

-Q.  Explain star topology with their advantages.

Q. What are the responsibilities of session and presentation layer ?

Q. State advantages and disadvantages of mesh topology

Q. What is computer Network? Describe any four goals of computer Network.

Q. What is Topology ? Explain the Ring Topology with advantages and disadvantages.

Q. Explain hierarchical name space.

Q. Explain TCP/IP Model in detail.

Q. State four levels of addresses used in TCP/IP

Q. Using diagram, write the protocol stack of TCP/IP model.

Q. Compare and contrast OSI and TCP/IP model.

Q. Explain OSI reference model in detail.

-Q. Explain the similarities and differences between OSI and TCP/ IP reference model.

Chapter 2: Lower Layers

1 mark

Q. If a composite signal is composed of five sine waves of frequencies 100, 300, 500, 700 & 900 Hz. What is the bandwidth of the signal?

Q. A telephone network is an example of a circuit switched network. State True/False.

--Q.  List the three types of MAC protocol.

Q. What is the responsibility of Physical Layer ?

Q. What is bandwidth?

Q. What is conegstion?

Q. Define Jitter.

Q. Define Latency.

Q.  What is acknowledgment policy of data link layer for congestion control?

Q. Describe the functions performed by data link layer.

Q. List data representation forms or types.

Q.  List the cables used with Ethernet LAN.

Q. If the bandwidth of the channel is 10 kbps, how long does it take to transmit a frame of 100000 bits ?

4 mark

Q. Calculate the total delay for a frame of size 5 million bits which is sent on a link with 10 routers, each having queuing time 2 µs and a processing time of 1 µs. The length of the link is 2000 km and speed of light is 2 × 108 m/s in the link. The link has bandwidth 5 mbps.

Q.  Calculate the total delay for a frame of size 5 million bits which is sent on a link with 10 Routers, each having queuing time of 2
s and a processing time of 1
s. The length of the link is 2000 km and speed of light is 2 × 108 m/s in the link. The link has bandwidth 5 Mbps.

-Q. State the difference between LAN and WAN.

Q.  Explain the Data link protocols for noiseless channel.

Q.  Give difference between WLAN and Bluetooth.

Q. What is Taxonomy for Media Access Protocol?

Q. Which are the methods of framing.

Q.Write note on Circuit Switching.

Q. What is framing ? Explain any two framing methods with example

Chapter 3: Network Layer

1 mark
Q. Convert dotted decimal IP address to binary address 255.255.0.0

Q. What is the use of TTL field in IPv4.

Q. What is the size of IPv4 & IPv6 Address?

Q. Define routing.

Q. What is address resolution?

Q. Identify the address type for the MAC address FF:FF:FF:FF:FF:FF

Q. Define physical and logical address.

4 mark

Q.  Define attenuation, distortion and Noise

Q. Explain Host id and Net id of IP address classes.

Q. For the given IP address 205.16.37.39/28 in some block of address, 

Calculate : i) Address Mask ii) First Address of block iii) Last address of block iv) Number of addresses in the block

Chapter 4: Transport Layer

1 mark

Q.  Define Multiplexing and Demultiplexing.

-Q. What is Port address?

4 mark

Q.Explain Multiplexing & De_multiplexing in transport Layer.

Q. Write a note on UDP.

Q. What are the services provided by user agent?

Q.  Draw and explain UDP datagram.

Q. Explain TCP features.

Q.What is channelization? List the methods of channelization. Explain any one method

Q. What is channelization ? List three channelization methods and explain any one method

Q. Define contention system

Q.  State the difference between Reservation and Polling.

Q. Explain active web document.

Q. What is firewall? Explain packet firewall.

Q. Explain the packet switching with advantages and disadvantages.

Q. Explain RARP. What are its advantages and disadvantages

Q. Explain 10Base5, 10Base2, 10Base-T, 10Base-F

Q. Explain dynamic and static address mapping in ARP

Q.  Explain syntax of URL.

Q. Draw the frame format of PPP.

Q. What is Piggybacking ?

-Q. Write a short note on Microwave Transmission

-Q. State the applications of coaxial cable.

Q.  Explain coaxial cable and give its applications, advantages and disadvantages.

Q. Draw the frame format of PPP.

-Q.  State the connectors used with fiber optic cables.

Q. Explain fiber optic cable with their types and applications.

Q. Explain the characteristics of line coding.

Q. What is the purpose of line testing tool ?

Q. Define Bridge. List the types of Bridges and explain any one type in detail

Q.  What is flow control ? Why is it needed ?