Computer Network

This layer is an addition to OSI model when compared with TCP IP model:

Application layer is implemented on:

Which of the following is not applicable for IP?

Which one of the following is not a function of network layer?

For a 10 Mbps Ethernet link, if the length of the packet is 32 bits, the transmission delay is (in milliseconds):

Transmission delay does not depend on:

In TCP, sending and receiving data is done as:

Suppose a TCP connection is transferring a file of 1000 bytes. The first byte is numbered 10001. What is the sequence number of the segment if all data is sent in only one segment?

The protocol on which DNS application run is:

____ allows you to connect and login to a remote computer.

Draw a neat diagram of TCP/IP protocol stack with the protocols and functionality implemented on each layer. Also explain, why there is a need for having a layered architecture (like OSI and TCP/IP) in networks.

We know that there are 2 types of address schemes (i.e. IP address and MAC address) in computer networks. Explain what the need of having two types of addresses. What will happen if we use only IP address in computer networks?

What do you mean by Random Access Protocols? Explain the limitations of using ALOHA as random access protocol.

In the context of Transmission Control Protocol (TCP), explain the statement, "TCP help us to establish a reliable connection over an unreliable network".

Outline the difference between TCP and UDP.

Why there is a need of doing error control at transport layer despite of the fact that we are doing the same thing at the data link layer? Why we are doing this error correction multiple times?

Explain type of delays in computer networks. Suppose a node A wants to send data of 200 mb to node B. The bandwidth of the channel is 1 Gbps. There are three routers in between node A to node B. Assume other delays equal to 0. Calculate the total delay involved.

With the help of neat figures, explain sliding window mechanism.

(a) ARP vs RARP

(b) Unicast vs Multicast

(c) Flooding vs Broadcasting

(d) Amplifiers vs Repeaters

This layer is an addition to OSI model when compared with TCP IP model:

Application layer is implemented on:

Which of the following is not applicable for IP?

Which one of the following is not a function of network layer?

For a 10 Mbps Ethernet link, if the length of the packet is 32 bits, the transmission delay is (in milliseconds):

Transmission delay does not depend on:

In TCP, sending and receiving data is done as:

Suppose a TCP connection is transferring a file of 1000 bytes. The first byte is numbered 10001. What is the sequence number of the segment if all data is sent in only one segment?

The protocol on which DNS application run is:

____ allows you to connect and login to a remote computer.

Draw a neat diagram of TCP/IP protocol stack with the protocols and functionality implemented on each layer. Also explain, why there is a need for having a layered architecture (like OSI and TCP/IP) in networks.

We know that there are 2 types of address schemes (i.e. IP address and MAC address) in computer networks. Explain what the need of having two types of addresses. What will happen if we use only IP address in computer networks?

What do you mean by Random Access Protocols? Explain the limitations of using ALOHA as random access protocol.

In the context of Transmission Control Protocol (TCP), explain the statement, "TCP help us to establish a reliable connection over an unreliable network".

Outline the difference between TCP and UDP.

Why there is a need of doing error control at transport layer despite of the fact that we are doing the same thing at the data link layer? Why we are doing this error correction multiple times?

Explain type of delays in computer networks. Suppose a node A wants to send data of 200 mb to node B. The bandwidth of the channel is 1 Gbps. There are three routers in between node A to node B. Assume other delays equal to 0. Calculate the total delay involved.

With the help of neat figures, explain sliding window mechanism.

(a) ARP vs RARP

(b) Unicast vs Multicast

(c) Flooding vs Broadcasting

(d) Amplifiers vs Repeaters

The IETF standard documents are called

The ____ is the physical path over which a message travels.

The structure or format of data is called

Transport layer is implemented in

The functionalities of presentation layer includes

Header of a frame generally contains

Which one of the following is the multiple access protocol for channel access control?

User datagram protocol is called connectionless because

Transport layer protocols deals with

Which one of the following is not a function of network layer?

The ISO reference model defines seven protocol layers, each of which is responsible for a specific range of functions. By considering this model, explain the main functions performed by a protocol operating at- (a) the physical layer; (b) the transport layer; (c) the network layer.

Based on the single-bit parity error-detection code devise a new code to detect and correct a single 1-bit error in 4 bytes of data. How many parity bits do you require? You may assume that parity bits are error-free.

In the context of Transmission Control Protocol (TCP), briefly describe the purpose of TCP as well as the layer of the TCP/IP protocol architecture where it is found.

TCP implements a mechanism called the three-way handshake. Indicate the purpose of such mechanism and using a diagram, give an example on how it works emphasising the values of the TCP flags used as well as the sequence number.

With the help of neat diagrams, explain the term 'exponential backoff' in reference to CSMA/CD.

List various congestion control mechanisms. Explain any one in detail.

State the need for an IP address. Also, explain various classes of IP addressing scheme.

(a) Peer to peer networks

(b) Distance vector routing algorithm

(c) OSPF routing protocol

(d) E-mail

(e) ALOHA

(a) TCP vs. UDP

(b) Static routing vs. Dynamic routing

(c) IMAP vs. PoP

The IETF standard documents are called

The ____ is the physical path over which a message travels.

The structure or format of data is called

Transport layer is implemented in

The functionalities of presentation layer includes

Header of a frame generally contains

Which one of the following is the multiple access protocol for channel access control?

User datagram protocol is called connectionless because

Transport layer protocols deals with

Which one of the following is not a function of network layer?

The ISO reference model defines seven protocol layers, each of which is responsible for a specific range of functions. By considering this model, explain the main functions performed by a protocol operating at- (a) the physical layer; (b) the transport layer; (c) the network layer.

Based on the single-bit parity error-detection code devise a new code to detect and correct a single 1-bit error in 4 bytes of data. How many parity bits do you require? You may assume that parity bits are error-free.

In the context of Transmission Control Protocol (TCP), briefly describe the purpose of TCP as well as the layer of the TCP/IP protocol architecture where it is found.

TCP implements a mechanism called the three-way handshake. Indicate the purpose of such mechanism and using a diagram, give an example on how it works emphasising the values of the TCP flags used as well as the sequence number.

With the help of neat diagrams, explain the term 'exponential backoff' in reference to CSMA/CD.

List various congestion control mechanisms. Explain any one in detail.

State the need for an IP address. Also, explain various classes of IP addressing scheme.

(a) Peer to peer networks

(b) Distance vector routing algorithm

(c) OSPF routing protocol

(d) E-mail

(e) ALOHA

(a) TCP vs. UDP

(b) Static routing vs. Dynamic routing

(c) IMAP vs. PoP

(a) Write any two functions of the session layer in OSI model.

(b) What is Hamming code?

(c) What is the significance of the twisting in twisted-pair cable?

(d) What do you mean by piggybacking?

(e) What is the purpose of the jam signal in CSMA/CD?

(f) What are the advantages of dividing an Ethernet LAN with a bridge?

(g) What does the term 'best effort' mean in context with IP?

(h) Why is there no need of CSMA/CD in a full-duplex switched Ethernet?

(i) How does redundancy facilitate error detection?

Describe the architecture and working of ring topology. What are its advantages and disadvantages?

Compare and contrast between the OSI model and the TCP/IP model.

Describe the working of fiber-optic cables. Briefly explain different propagation modes used in fiber-optic cables.

Explain Go-Back-N ARQ as a sliding window mechanism for error control.

Describe how the two-dimensional parity check is able to detect errors. Consider '1100101100110000110100101101' as the data that is to be sent over the network.

Draw a flowchart and explain the working procedure of the pure ALOHA protocol.

Explain in detail Fast Ethernet. Describe the structure of the physical layer and various implementation types at this layer.

With the help of a neat and labelled diagram, explain the message format of ICMP. Explain various types of ICMP error messages and query messages.

What do you mean by layer 2 switching? Explain in detail the functioning of layer 2 switches.

Discuss the functions and the design issues of the network layer in the OSI model.

Describe bridge in terms of networking device. What are different types of network bridge?

Differentiate between Static Routing and Dynamic Routing.

(a) Border Gateway Protocol

(b) User Datagram Protocol

(a) Write any two functions of the session layer in OSI model.

(b) What is Hamming code?

(c) What is the significance of the twisting in twisted-pair cable?

(d) What do you mean by piggybacking?

(e) What is the purpose of the jam signal in CSMA/CD?

(f) What are the advantages of dividing an Ethernet LAN with a bridge?

(g) What does the term 'best effort' mean in context with IP?

(h) Why is there no need of CSMA/CD in a full-duplex switched Ethernet?

(i) How does redundancy facilitate error detection?

Describe the architecture and working of ring topology. What are its advantages and disadvantages?

Compare and contrast between the OSI model and the TCP/IP model.

Describe the working of fiber-optic cables. Briefly explain different propagation modes used in fiber-optic cables.

Explain Go-Back-N ARQ as a sliding window mechanism for error control.

Describe how the two-dimensional parity check is able to detect errors. Consider '1100101100110000110100101101' as the data that is to be sent over the network.

Draw a flowchart and explain the working procedure of the pure ALOHA protocol.

Explain in detail Fast Ethernet. Describe the structure of the physical layer and various implementation types at this layer.

With the help of a neat and labelled diagram, explain the message format of ICMP. Explain various types of ICMP error messages and query messages.

What do you mean by layer 2 switching? Explain in detail the functioning of layer 2 switches.

Discuss the functions and the design issues of the network layer in the OSI model.

Describe bridge in terms of networking device. What are different types of network bridge?

Differentiate between Static Routing and Dynamic Routing.

(a) Border Gateway Protocol

(b) User Datagram Protocol