Switching and Routing Technology (EMCS-674)

Class Test -1

1. The set of rules used by network for communication is called -

(a) Interface (b) Protocol(c) Network S/W

2. Network speed does not depend on –

(a) bit rate b) latency c) data bus

3. “A network should operate in spite of failures or lost data”–this network protocol is called –

(a) Scalability (b) Determinism (c) Robustness

4. using …………network, a continuous stream of bytes can be sent

(a) Circuit switched (b) Packet switched (c) Message Switched

5. …….. Creates reliable data transfer, offers a logical stream of data.

(a) HTTP ( b) TCP (c) IP

6. The TCP/IP reference model consists of …………software layer.(a) 5 (b) 4 (c) 3

7. In TCP/IP………..layer handles end-to-end communication.

(a) Transport (b) Internet (c) Application

8. ………..Layer handles communication between machines.

(a) Transport (b) Internet (c) Application

9. Any connection between two or more network is called

(a) Intranet (b) Internet (c) WAN

10. ARPANET is a–

(a) Packet switched Network(b) Circuit Switched Network (c) Datagram Network

11. Routers are typically network slowdowns: (a) True(b) False

12. TCP/IP programming was incorporated into(a) UNIX OS(b) LINUX OS (c) DOS

13. It is now possible for anyone to write internet application: (a) True(b) False

14. …….. is the framework for the Internet. (a) Milnet(b) ARPANET (c) TCP/IP

15. Network don’t use standardize H/W –(a) True (b) False

16. The time to take a bit to be received by the destination is called –

(a) Bit rate (b) Bandwidth (c) Latency

17. For load balancing the best network is –

(a) Circuit switching (b) Virtual circuit packet switch (c) Datagrams packet

18. Infrequent messaging is suitable for connection-based network: (a) True (b) False

19. In ……. network, waste a lot of time routing messages to the same destination.

(a) Circuit Switching (b) Virtual Circuit Packet Switching (c) Datagram Packet Switching

20. Name three problems dealing with the data link layer

(a) Flow control……(b) Error checking…………. (c) Group of ………..

Class Test –2

Find the most appropriate answers:

1. In most networks a single medium is shared by all of a network’s hosts. (a) True (b) False2. In shared medium, collision causes the message to be combinedandscrambled3. The contention network does not experience collisions (a) True (b) False4. CSMA / CD stands for Carrier Sense Multiple Access / Collision Detection5. After detected carrier in a shared medium and determining there is no signal, collisions can still

occur: (a) True (b) False6. Data Link Layer deals with: (a) Network Address (b) IP Address (c) MAC Address7. Data Link Layer addresses are only used on

(a) Single Network (b) Multiple Network (c) Internet8. control is limiting the packet rate between source and destination on the same LAN.

(a)Flow (b) Error (c) Congestion9. In sliding window techniques destination acknowledges a frame by sending acknowledgement

with sequence number of -(a) Last frame received (b) Next frame expected (c) each frame received

10. Reliability at the data link layer is usually unnecessary:(a) True (b) False11. Which of the following is not in connection with error control methods:

(a) Checksum (b) Parity (c) Multiplexing12. In a bridge frame handling is done using _________ method

(a) Store-and-Forward (b) Cut-through (c) Both13. Which of the following is not in connection with layer 2 switch?

(a) Frame handling is done in H/W (b) Multiple data path (c) Forward one frame at a time14. A big network is divided in to sub-networks which are connected by –

(a) Routers (b) Bridges (c) Layer-2 Switch

15. ____________________maintains and exchanges routing data with routers:(a) Switching Fabric (b) Routing Processor (c) CPU

16. The network of connections between network interfaces is called:(a) Input / Output interface (b) Switching fabric (c) I/O buffers

17. Each network interface would always have its own routing processor (a) True (b) False18. The banks of very high speed memory for packet queuing prior to processing one called (a) Input

Buffer (b) Output buffer (c) Router’s memory19. The routing processor used the forwarding table data to configure the _______________to

forward the packet to the correct output port(a) Input buffer (b) Output buffer (c) Switching fabric

20. For which type for switching fabric the following statement is true: “If any bus fails, alternatepath exist so that forwarding can continue”

(a) In-memory switching fabric (b) Crossbar switching fabric (c) Bus-based switching fabric

Class test –3

1.a. TCP/IP is the framework for internet –explainb. What are the difference between hub, layer 2 and 3 switch, with diagramc. What sliding window tech, explain sliding window protocol with diagram

2.a. How can you define error control? Suppose a message m=1011. Find transmitted code

and correct the code where there is an error using hamming method with even parityb. Explain components of a router with diagram

Class Test –4

1. Discuss the implementation of connection oriented / connection-less routing with example

2. Discuss shortest path algorithm with example. Example should include step-by-step process of findingthe shortest.

3. What is distance vector routing? Give an example and find the new table.

4. What is Hierarchical routing? Give an example with 5 regions.

Class Test –5

Find the appropriate answers:

1. In fixed routing the link cost is calculated based on dynamic data –(a) True (b) False2. In IRP if multiple routers attached to network, host does not need routing table, (a) True (b) False3. In an AS routers and networks are always connected. (a) True (b) False4. Which of the following is not connected with IRP:

(a) Passes routing information between routers within AS(b) Need to be implemented outside AS(c) Need minimum information from other connected AS

5. Rapid oscillation in routing caused (a) fluttering (b) looping (c) count-to-infinite problem6. ERP deals with details within target AS. (a) true (b) false7. ………………………….max occur when changes in connectivity not propagated fast enough to all other

routers. (a) fluttering (b) looping (c) count-to-infinite problem8. IRP needs maximum information from other connected AS. (a) true (b) false9. Adapting routing can aid …….. control (a) congestion (b) flow (c) error10. Adaptive routing depends on information collected on one place and used in same place. (a) true

(b) false

Broad Questions:

11. How can you define Autonomous Systems (AS)?12. Define different types of fragmentation with example. Suppose a 23 byte packet is to be

transmitted through a network of maximum packet length = 4 byte. The elementary fragment sizeis 1 byte. Show the segment numbering of the above packet no-501