List all seven layer of OSI model and describe function of application layer.

List all seven layer of OSI model and describe function of application layer.
by

1 Answer

Answer :

The layers of OSI model are as follows: 

(1) The Physical Layer: This defines an interface in terms of the connections, voltage levels and data rate, in order for signals to be transmitted bit by bit. 

(2) The link Layer: This provides error detection and correction for a link to ensure that the exchange of data is reliable. It may require the data stream to be divided into blocks, called packets, for inserting error-checking bits or for synchronization. However, transparency is preserved for the data bits in these blocks. 

(3) The network layer: This is concerned with the operation of the network between the terminals. It is responsible for establishing the corrections between the appropriate network nodes. 

(4) The transport layer: This is responsible for establishing a network independent communication path suitable for the particular terminal equipments (e.g. providing the appropriate data rate and end-to-end error control). It thus relieves the user from being concerned with such details. 

(5) The session layer: This is concerned with setting up and maintaining an operational session between terminals. For example, ‘signing on’ at the commencement of a task and ‘signing off ’ at its end. 

(6) The presentation layer: This is concerned with the format of the data presented, in order to overcome difference in representation of the information as supplied to one terminal and required at the other. Its purpose is to make communication over the network machine-independent. 

(7) The application layer: This defines the nature of the task to be performed. It supplies the user with the applications programs needed. Examples include electronic mail, word processing, banking transactions, etc.  
by

Related questions

Explain the architecture of SS7 and compare with seven-layer OSI architecture.

Description : Explain the architecture of SS7 and compare with seven-layer OSI architecture.

Last Answer : A block schematic diagram of the CCITT no. 7 signaling system is shown in fig. Signal messages are passed from the central processor of the sending exchange to the CCS system. This consists of the microprocessor based ... part (TUE), the data user part(DUP) and the (ISDN) user part (ISDN-UP).  

What are the end-to-end layers of OSI structure? Explain the transport layer in detail.

Description : What are the end-to-end layers of OSI structure? Explain the transport layer in detail.

Last Answer : The layers 4-7 of ISO-OSI reference model communicate with peer entities in the end systems. There is no communication with entities in the intermediate systems. In this sense, ... tracking, connection flow control, sequencing of data, error checking, and application addressing and identification.

What layers are covered under end to end layer connectivity? Explain briefly the function of each one of them.

Description : What layers are covered under end to end layer connectivity? Explain briefly the function of each one of them.

Last Answer : The layers 4-7 of ISO-OSI reference model communicate with peer entities in the end systems. There is no communication with entities in the intermediate systems. In this sense, layers 4-7 are often ... 6. Editors and terminal support services 7. Telematic services like videotext. 

Network Layer is used for (A) Breaking up the data in frames for transmission (B) Deal with Error correction (C) Automatic Recovery of Procedure (D) Physical Architecture

Description : Network Layer is used for (A) Breaking up the data in frames for transmission (B) Deal with Error correction (C) Automatic Recovery of Procedure (D) Physical Architecture

Last Answer : (D) Physical Architecture

The TCP/IP _______ layer is equivalent to the combined session, presentation, and application layers of the OSI model. a.data link b.network c.physical d.application

Description : The TCP/IP _______ layer is equivalent to the combined session, presentation, and application layers of the OSI model. a.data link b.network c.physical d.application

Last Answer : d.application

The TCP/IP …………corresponds to the combined session, presentation, and application layers of the OSI model. a.session layer b.presentation layer c.application layer d.None of the above

Description : The TCP/IP …………corresponds to the combined session, presentation, and application layers of the OSI model. a.session layer b.presentation layer c.application layer d.None of the above

Last Answer : c.application layer

TELNET, FTP, SMTP, Protocols fall in the following layer of OSI reference model? a. Transport layer b. Internet layer c. Network layer d. Application layer

Description : TELNET, FTP, SMTP, Protocols fall in the following layer of OSI reference model? a. Transport layer b. Internet layer c. Network layer d. Application layer

Last Answer : d. Application layer

Which of the following statements can be associated with OSI model? a. A structured way to discuss and easier update system components b. One layer may duplicate lower layer functionality c. Functionality at one layer no way requires information from another layer d. It is an application specific network model

Description : Which of the following statements can be associated with OSI model? a. A structured way to discuss and easier update system components b. One layer may duplicate lower layer functionality c. ... no way requires information from another layer d. It is an application specific network model

Last Answer : b. One layer may duplicate lower layer functionality

Which of the following layers is an addition to OSI model when compared with TCP IP model? a. Application layer b. Presentation layer c. Session layer d. Session and Presentation layer

Description : Which of the following layers is an addition to OSI model when compared with TCP IP model? a. Application layer b. Presentation layer c. Session layer d. Session and Presentation layer

Last Answer : d. Session and Presentation layer

In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________ a. Application layer b. Transport layer c. Link layer d. Session layer

Description : In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________ a. Application layer b. Transport layer c. Link layer d. Session layer

Last Answer : d. Session layer

In OSI model, which of the following layer transforms information from machine format into that understandable by user a. application b. sessionc. presentation d. physical

Description : In OSI model, which of the following layer transforms information from machine format into that understandable by user a. application b. session c. presentation d. physical

Last Answer : c. presentation

Which of the following layers of the OSI reference model is concerned with the syntax of data exchanged between application entities? a. Presentation layer b. Application layer c. Transportation layer d. Session layer

Description : Which of the following layers of the OSI reference model is concerned with the syntax of data exchanged between application entities? a. Presentation layer b. Application layer c. Transportation layer d. Session layer

Last Answer : a. Presentation layer

.Which of the following statements can be associated with OSI model? a. A structured way to discuss and easier update system components b. One layer may duplicate lower layer functionalityc. Functionality at one layer no way requires information from another layer d. It is an application specific network model

Description : .Which of the following statements can be associated with OSI model? a. A structured way to discuss and easier update system components b. One layer may duplicate lower layer functionality c. ... no way requires information from another layer d. It is an application specific network model

Last Answer : Functionality at one layer no way requires information from another layer

In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________ a. Application layer b. Transport layer c. Link layer d. Session layer

Description : In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________ a. Application layer b. Transport layer c. Link layer d. Session layer

Last Answer : d. Session layer

Which of the following layers is an addition to OSI model when compared with TCP IP model? a. Application layer b. Presentation layer c. Session layer d. Session and Presentation layer

Description : Which of the following layers is an addition to OSI model when compared with TCP IP model? a. Application layer b. Presentation layer c. Session layer d. Session and Presentation layer

Last Answer : d. Session and Presentation layer

Which is the additional layer to OSI model when compared with TCP IP model? a. Application layer b. Presentation layer c. Session layer d. Session and Presentation layer

Description : Which is the additional layer to OSI model when compared with TCP IP model? a. Application layer b. Presentation layer c. Session layer d. Session and Presentation layer

Last Answer : d. Session and Presentation layer

In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________ a) Application layerb) Transport layer c) Link layer d) Session layer

Description : In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________ a) Application layer b) Transport layer c) Link layer d) Session layer

Last Answer : d) Session layer

Choose the correct layer numbers and names of the OSI model below. a. Layer 3 - Network Layer, Layer 2 - Data Link Layer, Layer 1 - Physical Layer b. Layer 7 - Application Layer, Layer 6 - Presentation Layer c. Layer 5 - Session Layer, Layer 4 - Transport Layerd. All given options

Description : Choose the correct layer numbers and names of the OSI model below. a. Layer 3 - Network Layer, Layer 2 - Data Link Layer, Layer 1 - Physical Layer b. Layer 7 - Application Layer, Layer 6 - Presentation Layer c. Layer 5 - Session Layer, Layer 4 - Transport Layer d. All given options

Last Answer : d. All given options

What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model? a. Internet b. Host to host c. Network Access d. Application

Description : What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model? a. Internet b. Host to host c. Network Access d. Application

Last Answer : b. Host to host

Which layer is called a port layer in OSI model? a. Session b. Application c. Presentation d. Transport

Description : Which layer is called a port layer in OSI model? a. Session b. Application c. Presentation d. Transport

Last Answer : a. Session

Which layer of OSI reference model is responsible for decomposition of messages and generation of sequence numbers to ensure correct re-composition from end to end of the network? (A) Physical (B) Data-link (C) Transport (D) Application

Description : Which layer of OSI reference model is responsible for decomposition of messages and generation of sequence numbers to ensure correct re-composition from end to end of the network? (A) Physical (B) Data-link (C) Transport (D) Application

Last Answer : (C) Transport 

Show how finite state machine model helps in designing a switching system and give a typical example.

Description : Show how finite state machine model helps in designing a switching system and give a typical example.

Last Answer : Switching system basically belongs to the class of finite state machines (FSM) which are asynchronous in nature and follows a sequential logic for their operation. They can be modeled by ... circuits and memory elements. Clocked synchronous operation shown in Fig. overcome such problems.  

Describe the various signalling techniques. Compare in-channel signalling with common channel signaling, which is more advantageous.

Description : Describe the various signalling techniques. Compare in-channel signalling with common channel signaling, which is more advantageous.

Last Answer : Signaling systems link the variety of switching systems, transmission systems and subscriber equipments in telecommunication network to enable the network to function as a whole. Three forms of signaling are ... for passing control signals for a group of trunks or information       

Classify data networks. Explain with the help of Nyquist theorem, the data rate limitations in PSTN’s. Give an account of modems used in data transfer. Explain their importance and list some of the V-series recommendations.

Description : Classify data networks. Explain with the help of Nyquist theorem, the data rate limitations in PSTN’s. Give an account of modems used in data transfer. Explain their importance and list some of the V-series recommendations.

Last Answer : Classifications of Data Network:  Data Networks are classified according to their geographical coverage: Wide area networks (WANs) Metropolitan area networks(MANs) Local area ...  V.53 Limits for the maintenance of telephone type circuits used for data transmission. 

What is the main function of Session layer in OSI model? a. Defines how data is formatted between the devices b. Made physical connection between server and client c. Both a and b d. None of the above

Description : What is the main function of Session layer in OSI model? a. Defines how data is formatted between the devices b. Made physical connection between server and client c. Both a and b d. None of the above

Last Answer : a. Defines how data is formatted between the devices

Explain the function of each layer of OSI reference model with neat diagram.

Description : Explain the function of each layer of OSI reference model with neat diagram.

Last Answer : OSI model (open system interconnection) model was developed by ISO (international standard organization) Function of OSI model: i. It provides way to understand how internetwork operates. ... Network virtual terminal file transfer access and management mail services and directory services

Give function of each layer of OSI reference model.

Description : Give function of each layer of OSI reference model.

Last Answer : OSI model (open system interconnection) model was developed by ISO (international standard organization)  Function of OSI model: i. It provides way to understand how internetwork operates. ... virtual terminal file transfer access and management mail services and directory services

Explain the seven layers of the OSI reference model.

Description : Explain the seven layers of the OSI reference model.

Last Answer : Below are the seven layers of the OSI reference model:  Physical Layer: This layer converts data bits into radio signals. An example of this is Ethernet.  Data Link layer: At data ... which both end user and application interact with. This layer provides services like email, file transfer, etc.

In respect of OSI model, LANs implement a. lower two layers b. all seven layers c. upper five layers d. None of the above

Description : In respect of OSI model, LANs implement a. lower two layers b. all seven layers c. upper five layers d. None of the above

Last Answer : b. all seven layers

A ________ is normally a computer that operates in all five layers of the Internet model or seven layers of OSI model.

Description : A ________ is normally a computer that operates in all five layers of the Internet model or seven layers of OSI model.

Last Answer : gateway

What are different control function categories, explain, how they help in signalling and control.

Description : What are different control function categories, explain, how they help in signalling and control.

Last Answer : In some switching systems, the control subsystem may be an integral part of the switching network itself. Such system is known as direct control switching systems. Those systems in which the control ... may be carried out at the level of the common control unit or the switching network.  

The function of ARQ in a network protocol is to: (A) Auto request (B) Acknowledge (C) Address request (D) Abort

Description : The function of ARQ in a network protocol is to: (A) Auto request (B) Acknowledge (C) Address request (D) Abort

Last Answer : (A) Auto request

Layer one of the OSI model is a. physical layer b. link layer c. transport layer d. network layer e. none of above

Description : Layer one of the OSI model is a. physical layer b. link layer c. transport layer d. network layer e. none of above

Last Answer : physical layer

The _______ layer corresponds to thephysical layer of the OSI model. A) section B) line C) path D) photonic

Description : The _______ layer corresponds to thephysical layer of the OSI model. A) section B) line C) path D) photonic

Last Answer : section

The layer of OSI model can use the trailer of the frame for error detection. A) Physical B) Data link C) Transport D) Presentation

Description : The layer of OSI model can use the trailer of the frame for error detection. A) Physical B) Data link C) Transport D) Presentation

Last Answer : A) Physical

The layer one of the OSI model is A) Physical layer B) Link layer C) Router layer D) Broadcast layer

Description : The layer one of the OSI model is A) Physical layer B) Link layer C) Router layer D) Broadcast layer

Last Answer : A) Physical layer

Which of the following layers of the OSI model is responsible for user interaction? a.Layer 4 b.Layer 5 c.Layer 6 d.Layer 7

Description : Which of the following layers of the OSI model is responsible for user interaction? a.Layer 4 b.Layer 5 c.Layer 6 d.Layer 7

Last Answer : d.Layer 7

In OSI model, session layer is responsible for a. Recovery b. Check pointing c. Both a and b d. None of the above

Description : In OSI model, session layer is responsible for a. Recovery b. Check pointing c. Both a and b d. None of the above

Last Answer : c. Both a and b

Which network component/s is/are involved in the Presentation layer of an OSI model? a. Gateway b. Multiplexer & Oscilloscope c. Amplifier & Hub d. All of the above

Description : Which network component/s is/are involved in the Presentation layer of an OSI model? a. Gateway b. Multiplexer & Oscilloscope c. Amplifier & Hub d. All of the above

Last Answer : a. Gateway

Transport layer is which layer in OSI model? a. Fourth layer b. Third layer c. Second layer d. Fifth layer\

Description : Transport layer is which layer in OSI model? a. Fourth layer b. Third layer c. Second layer d. Fifth layer\

Last Answer : a. Fourth layer

Which level is the network layer in the OSI model? a. Third level b. Fourth level c. Second level d. Fifth layer

Description : Which level is the network layer in the OSI model? a. Third level b. Fourth level c. Second level d. Fifth layer

Last Answer : a. Third level

Choose the Protocols working in the Data Link Control Layer of OSI model below. a. ATM (Asynchronous Transfer Mode), Frame Relay b. HDLC (High Level Data Link Control), SDLC (Synchronous Data Link Control)c. ARP (Address Resolution Protocol), IEEE802.3 d. All the above

Description : Choose the Protocols working in the Data Link Control Layer of OSI model below. a. ATM (Asynchronous Transfer Mode), Frame Relay b. HDLC (High Level Data Link Control), SDLC (Synchronous Data Link Control) c. ARP (Address Resolution Protocol), IEEE802.3 d. All the above

Last Answer : d. All the above

In the TCP/IP protocol architecture, the Network Access Layer includes ………………………………...layers of the OSI Reference Model. A. presentation, session, applicationB. physical, data link, network C. data link, network D. physical, data link

Description : In the TCP/IP protocol architecture, the Network Access Layer includes ………………………………...layers of the OSI Reference Model. A. presentation, session, application B. physical, data link, network C. data link, network D. physical, data link

Last Answer : B. physical, data link, network

The physical address to each machine is provided by which layer in an OSI reference model? A. Physical layer B. Data Link Layer C. Network Layer D. Transport Layer

Description : The physical address to each machine is provided by which layer in an OSI reference model? A. Physical layer B. Data Link Layer C. Network Layer D. Transport Layer

Last Answer : B. Data Link Layer

The physical address to each machine is provided by which layer in an OSI reference model? A. Physical layer B. Data Link Layer C. Network Layer D. Transport Layer

Description : The physical address to each machine is provided by which layer in an OSI reference model? A. Physical layer B. Data Link Layer C. Network Layer D. Transport Layer

Last Answer : B. Data Link Layer

In OSI model at which layer modulator/demodulators are used? A. data link layer B. network layer C. session layer D. physical Layer

Description : In OSI model at which layer modulator/demodulators are used? A. data link layer B. network layer C. session layer D. physical Layer

Last Answer : D. physical Layer

The layer that transmits data in the form of bit streams using electrical and mechanicalsystems is in the OSI model. a. Physical layer b. Transport Layer c. Network Layer d. Data Link Layer

Description : The layer that transmits data in the form of bit streams using electrical and mechanicalsystems is in the OSI model. a. Physical layer b. Transport Layer c. Network Layer d. Data Link Layer

Last Answer : a. Physical layer

A layer of the OSI model on one system communicates with the layer of its peer system. a. above b. same c. below d. None

Description : A layer of the OSI model on one system communicates with the layer of its peer system. a. above b. same c. below d. None

Last Answer : b. same

Each layer of the OSI model receives services or data from a layer. a. none b. below and above layer both c. above layer d. below layer

Description : Each layer of the OSI model receives services or data from a layer. a. none b. below and above layer both c. above layer d. below layer

Last Answer : d. below layer

The ............layer of OSI model can use the trailer of the frame for error detection. A) Physical B) Data link C) Transport D) Presentation

Description : The ............layer of OSI model can use the trailer of the frame for error detection. A) Physical B) Data link C) Transport D) Presentation

Last Answer : A) Physical