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OSI Model – Quiz

Take the  Quiz : All about the OSI  Reference  Model . Analyze your understanding of computer networking.

Quiz in the OSI model which is a reference model in the computer network.

SHH(Secure Shell) work on which port no?

What are layers of Osi From top to Bottom?

What are the upper Layers in the OSI layer model?

Arbitration,Physical Addressing,Error detection,Data Framing occur at which Layer

The process of TCP on one computer marking a TCP segment as segment 1, and the receiving computer then acknowledging the receipt of TCP segment 1 is an example of what?

LLC sublayer and MAC sublayer are present on which Layer of OSI Model?

Which OSI encapsulation term can be used instead of the term frame?

Flow control takes place at which layer?

Which of the following takes place at the presentation layer?

The process of a web server adding a TCP header to the contents of a web page, followed by adding an IP header and then adding a data-link header and trailer, is an example of what?

In which layer term “Packet” is used?

The acronym OSI stands for

Error detection and recovery take place at which layer?

Gateway are used to connect—————Networks

To interconnect two different networks we use

The process of HTTP asking TCP to send some data and making sure that it is received correctly is an example of what?

Assigning of IP address done at which layer?

Acronym of LLC which is sub-layer of data link layer is

Repeaters and hubs operate at which layer in OSI model?

which is a layer 2 device in the OSI model?

IPSec stand for

What protocols reliable in TCP and UDP?

What will be the PDU name of the Application layer?

which is 4th layer in OSI model?

A router is which layer Devie in the OSI model?

Which of the following terms is used specifically to identify the entity created when encapsulating data inside data-link layer headers and trailers?

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Presentation Layer in OSI model

Prerequisite : OSI Model

Introduction : Presentation Layer is the 6th layer in the Open System Interconnection (OSI) model. This layer is also known as Translation layer, as this layer serves as a data translator for the network. The data which this layer receives from the Application Layer is extracted and manipulated here as per the required format to transmit over the network. The main responsibility of this layer is to provide or define the data format and encryption. The presentation layer is also called as Syntax layer since it is responsible for maintaining the proper syntax of the data which it either receives or transmits to other layer(s).

Functions of Presentation Layer :

The presentation layer, being the 6th layer in the OSI model, performs several types of functions, which are described below-

• Presentation layer format and encrypts data to be sent across the network.
• This layer takes care that the data is sent in such a way that the receiver will understand the information (data) and will be able to use the data efficiently and effectively.
• This layer manages the abstract data structures and allows high-level data structures (example- banking records), which are to be defined or exchanged.
• This layer carries out the encryption at the transmitter and decryption at the receiver.
• This layer carries out data compression to reduce the bandwidth of the data to be transmitted (the primary goal of data compression is to reduce the number of bits which is to be transmitted).
• This layer is responsible for interoperability (ability of computers to exchange and make use of information) between encoding methods as different computers use different encoding methods.
• This layer basically deals with the presentation part of the data.
• Presentation layer, carries out the data compression (number of bits reduction while transmission), which in return improves the data throughput.
• This layer also deals with the issues of string representation.
• The presentation layer is also responsible for integrating all the formats into a standardized format for efficient and effective communication.
• This layer encodes the message from the user-dependent format to the common format and vice-versa for communication between dissimilar systems.
• This layer deals with the syntax and semantics of the messages.
• This layer also ensures that the messages which are to be presented to the upper as well as the lower layer should be standardized as well as in an accurate format too.
• Presentation layer is also responsible for translation, formatting, and delivery of information for processing or display.
• This layer also performs serialization (process of translating a data structure or an object into a format that can be stored or transmitted easily).

Features of Presentation Layer in the OSI model: Presentation layer, being the 6th layer in the OSI model, plays a vital role while communication is taking place between two devices in a network.

List of features which are provided by the presentation layer are:

• Presentation layer could apply certain sophisticated compression techniques, so fewer bytes of data are required to represent the information when it is sent over the network.
• If two or more devices are communicating over an encrypted connection, then this presentation layer is responsible for adding encryption on the sender’s end as well as the decoding the encryption on the receiver’s end so that it can represent the application layer with unencrypted, readable data.
• This layer formats and encrypts data to be sent over a network, providing freedom from compatibility problems.
• This presentation layer also negotiates the Transfer Syntax.
• This presentation layer is also responsible for compressing data it receives from the application layer before delivering it to the session layer (which is the 5th layer in the OSI model) and thus improves the speed as well as the efficiency of communication by minimizing the amount of the data to be transferred.

Working of Presentation Layer in the OSI model : Presentation layer in the OSI model, as a translator, converts the data sent by the application layer of the transmitting node into an acceptable and compatible data format based on the applicable network protocol and architecture.  Upon arrival at the receiving computer, the presentation layer translates data into an acceptable format usable by the application layer. Basically, in other words, this layer takes care of any issues occurring when transmitted data must be viewed in a format different from the original format. Being the functional part of the OSI mode, the presentation layer performs a multitude (large number of) data conversion algorithms and character translation functions. Mainly, this layer is responsible for managing two network characteristics: protocol (set of rules) and architecture.

Presentation Layer Protocols : Presentation layer being the 6th layer, but the most important layer in the OSI model performs several types of functionalities, which makes sure that data which is being transferred or received should be accurate or clear to all the devices which are there in a closed network. Presentation Layer, for performing translations or other specified functions, needs to use certain protocols which are defined below –

• Apple Filing Protocol (AFP): Apple Filing Protocol is the proprietary network protocol (communications protocol) that offers services to macOS or the classic macOS. This is basically the network file control protocol specifically designed for Mac-based platforms.
• Lightweight Presentation Protocol (LPP): Lightweight Presentation Protocol is that protocol which is used to provide ISO presentation services on the top of TCP/IP based protocol stacks.
• NetWare Core Protocol (NCP): NetWare Core Protocol is the network protocol which is used to access file, print, directory, clock synchronization, messaging, remote command execution and other network service functions.
• Network Data Representation (NDR): Network Data Representation is basically the implementation of the presentation layer in the OSI model, which provides or defines various primitive data types, constructed data types and also several types of data representations.
• External Data Representation (XDR): External Data Representation (XDR) is the standard for the description and encoding of data. It is useful for transferring data between computer architectures and has been used to communicate data between very diverse machines. Converting from local representation to XDR is called encoding, whereas converting XDR into local representation is called decoding.
• Secure Socket Layer (SSL): The Secure Socket Layer protocol provides security to the data that is being transferred between the web browser and the server. SSL encrypts the link between a web server and a browser, which ensures that all data passed between them remains private and free from attacks.

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CCNA OSI Layer Exam Quiz

In today’s quiz within the overarching curriculum of the Cisco Certified Network Associate, we’ll be taking a look at a very important topic you’ll need to know about if you want to make it in the networking industry; the Open Systems Interconnection (OSI) model. What do you know about it?

Telnet, FTP, and SMTP reside on what layer of the OSI model?

Application layer

Data-Link layer

Network Layer

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 On which layer of the OSI model would you find the TCP and UDP protocols?

Data-Layer of DOD

Application Layer

Transport Layer

Session layer

Used primarily for control and messaging services, ICMP is a _______ layer protocol.

Network Layer Protocol

Data-Link Layer protocol

Physical Layer Protocol

WAN technologies, such as X.25 and ATM, would use what layer of the OSI model?

Data-link Layer

Session Layer

IPSec, which provides secure tunnels between two peers, resides on what layer of the OSI model?

Presentation Layer

Physical Layer

On what layer of the OSI model would you find IP and IPX?

The snmp protocol resides on the ___________ layer..

Data-Link Layer

The Cisco Discovery Protocol functions on what layer of the OSI model?

Sql and nfs reside on what layer of the osi model,  arp and rarp are ___________ layer protocols..

All of the above

Non Of the above

The connection-oriented, Sequence Package Exchange protocol, resides on what layer of the OSI model?

On what layer of the osi model would encryption take place.

Presentation layer

Which layer of the OSI model would PPP reside on?

Transportation Layer

None of the above

Which layer of the OSI model would LAPB reside on? 

On which layer of the osi model would hssi reside.

Internet Layer of DOD

Host to Host layer

Of the following protocols or standards, which does not reside on the Presentation layer of the OSI model?

 on what layer of the osi model would you find the best-effort protocol, udp, bgp, an external protocol, can be found on which layer of the osi model.

Presentration Layer

OSPF, RIP, and Net BEUI are __________ layer protocols.

Hdlc would be found on which layer of the osi model.

None Of the above

 HTML would reside on which layer of the OSI model?

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The OSI Model ( Back to all quizzes )

OSI networks are used in the southern hemisphere The OSI approach can be use to analyze many different network models OSI networks make better use of limited bandwidth OSI networks are more secure

Four Six Seven Nine

Physical Data Link Network Transport

TCP Link Layer and OSI Data Link Layer TCP Internetwork Layer and OSI Network Layer TCP Transport Layer and OSI Transport Layer TCP Application Layer and OSI Session Layer

Secure Data Link Layer (SDLL) Secure Network Layer (SNL) Secure Transport Layer (STL) Session and Presentation Layers

Because the TCP model does not worry about the Physical layer Because the TCP model designers were ignored at the 1981 OSI meeting in Utrect, Netherlands Because quite often the design of Data Link and Physical layers are tightly connected for a particular technology To make the TCP model easier to understand by end users

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OSI ( Network Model)

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• 1. Multiple Choice Edit 2 minutes 1 pt Which Layer is responsible to exchange dialogues between two systems on the network  Transport Layer Network Layer Session Layer Application Layer
• 2. Multiple Choice Edit 2 minutes 1 pt Bits are packaged at which layer of the OSI model? Physical Layer Data Link Layer Network Layer Presentation Layer
• 3. Multiple Choice Edit 1 minute 1 pt  The Physical layer actually places information on the medium. True False - -
• 4. Multiple Choice Edit 2 minutes 1 pt Which layer of the OSI does the Router work on?  Transport Layer Network Layer Data Link Layer Physical Layer
• 5. Multiple Choice Edit 2 minutes 1 pt Which layer of the OSI does the Switch work on?  Transport Layer Network Layer Data Link Layer Physical Layer
• 6. Multiple Choice Edit 2 minutes 1 pt Which layer of the OSI does the Hub work on?  Transport Layer Network Layer Data Link Layer Physical Layer
• 7. Multiple Choice Edit 2 minutes 1 pt Which layer of the OSI does the Firewall work on?  Transport Layer Network Layer Data Link Layer Physical Layer
• 8. Multiple Choice Edit 2 minutes 1 pt Which layer of the OSI is the Date encapsulated into segments ?  Transport Layer Network Layer Data Link Layer Physical Layer
• 9. Multiple Choice Edit 2 minutes 1 pt Which layer of the OSI is the Date encapsulated into Packets ?  Transport Layer Network Layer Data Link Layer Physical Layer
• 10. Multiple Choice Edit 2 minutes 1 pt Which layer of the OSI is the Date moving in Bits ?  Transport Layer Network Layer Data Link Layer Physical Layer
• 11. Multiple Choice Edit 2 minutes 1 pt Which Layer is responsible for data formats and coding between two systems on the network ? Transport Layer Presentation Layer Session Layer Application Layer
• 12. Multiple Choice Edit 2 minutes 1 pt Which Layer is responsible for Multimedia Operation  (.JPEG , .AVI,.MP3 and. docx) in the OSI Layers ? Transport Layer Presentation Layer Session Layer Application Layer
• 13. Multiple Choice Edit 2 minutes 1 pt FTP Protocol is working in which layer of OSI ? Transport Layer Presentation Layer Session Layer Application Layer
• 14. Multiple Choice Edit 2 minutes 1 pt TCP/UDP  Protocols are working in which layer of OSI ? Transport Layer Presentation Layer Session Layer Application Layer
• 15. Multiple Choice Edit 2 minutes 1 pt SPX and NCP Protocols are working in which layer of OSI ? Transport Layer Presentation Layer Session Layer Application Layer
• 16. Multiple Choice Edit 2 minutes 1 pt Flow control and windowing are working in which layer of OSI ? Transport Layer Presentation Layer Session Layer Application Layer
• 17. Multiple Choice Edit 2 minutes 1 pt  which layer of OSI is responsible for end-to end communication? Transport Layer Presentation Layer Session Layer Application Layer
• 18. Multiple Choice Edit 2 minutes 1 pt  The protocols ( Ethernet, Token Ring and   FDDI) are working in  which layer of OSI ? Transport Layer Presentation Layer Data Link Layer Application Layer
• 19. Multiple Choice Edit 2 minutes 1 pt The default protocol for the Microsoft Windows operating systems today is : IP IPX AppleTalk NetBEUI
• 20. Multiple Choice Edit 2 minutes 1 pt The default protocol for the Apple Macintosh  operating systems today is : IP IPX Netbeui AppleTalk
• 21. Multiple Choice Edit 2 minutes 1 pt The default protocol for the NetWare operating systems today is : IP IPX Netbeui AppleTalk
• 22. Multiple Choice Edit 2 minutes 1 pt The default protocol for the NetWare operating systems today is : IP IPX Netbeui AppleTalk
• 23. Multiple Choice Edit 2 minutes 1 pt   A type of protocol that transmits messages to a destination without first establishing a connection with the destination system    Connectionless   Connection-oriented  -- --
• 24. Multiple Choice Edit 2 minutes 1 pt FTP is an abbreviation of : File Towards Policy File Transfer Protocol  File Transport Protocol --
• 25. Multiple Choice Edit 2 minutes 1 pt Encryption takes place at which layer? Physical Layer Transport Layer Network Layer Presentation Layer
• 26. Multiple Choice Edit 2 minutes 1 pt MAC address is implemented at which OSI model layer? Physical Layer Data Link Layer Network Layer Presentation Layer
• 27. Multiple Choice Edit 2 minutes 1 pt  IP is implemented at which OSI model layer? Physical Layer Transport Layer Network Layer Presentation Layer
• 28. Multiple Choice Edit 2 minutes 1 pt HTTP Port number is equal to : 88 80 20 53
• 29. Multiple Choice Edit 2 minutes 1 pt HTTPs Port number is equal to : 80 443 441 53
• 30. Multiple Choice Edit 2 minutes 1 pt FTP Port number is equal to : 88 80 20 53
• 31. Multiple Choice Edit 2 minutes 1 pt SMTP Port number is equal to : 25 23 20 53
• 32. Multiple Choice Edit 2 minutes 1 pt DNS Port number is equal to : 88 80 20 53
• 33. Multiple Choice Edit 2 minutes 1 pt  Is an Internet standard for electronic mail (email) transmission: FTP DNS SMTP HTTP
• 34. Multiple Choice Edit 2 minutes 1 pt  Is the foundation of data communication for the World Wide Web (Internet).  FTP DNS SMTP HTTP
• 35. Multiple Choice Edit 2 minutes 1 pt Is a Data Link Layer protocol : Token Ring IP IPX TCP
• 36. Multiple Choice Edit 2 minutes 1 pt Is a Transport Layer protocol : UDP IP IPX FDDI
• 37. Multiple Choice Edit 2 minutes 1 pt Is a connectionless  protocol that works in the transport layer : UDP TCP Token Ring FDDI
• 38. Multiple Choice Edit 2 minutes 1 pt Is a connection-oriented  protocol that works in the transport layer : UDP TCP Token Ring FDDI
• 39. Multiple Choice Edit 2 minutes 1 pt Which of the following are considered to be the upper layer protocols? presentation and session application and presentation  application, presentation, and session  application, presentation, session, and transport 
• 40. Multiple Choice Edit 2 minutes 1 pt In which layer of the OSI the Data is encapsulated into Frame ?  Transport Layer Network Layer Data Link Layer Physical Layer

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Module 1.6.3 Physical Layer Quiz Answers

Network addressing and basic troubleshooting – module 1.6.3 physical layer quiz answers.

1. What is an important function of the physical layer of the OSI model?

• It accepts frames from the physical media.
• It encapsulates upper layer data into frames.
• It defines the media access method performed by the hardware interface.
• It encodes frames into electrical, optical, or radio wave signals.

Explanation: The physical layer of the OSI model accepts frames from the data link layer and encodes it for transport as bits across the network media.

2. A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

• presentation layer
• network layer
• physical layer
• data link layer

Explanation: The NIC has responsibilities in both Layer 1 and Layer 2. The NIC encodes the frame as a series of signals that are transmitted onto the local media. This is the responsibility of the physical layer of the OSI model. The signal could be in the form of electrical, optical, or radio waves.

3. What is the purpose of the OSI physical layer?

• controlling access to media
• transmitting bits across the local media
• performing error detection on received frames
• exchanging frames between nodes over physical network media

Explanation: The physical layer is responsible for transmitting the actual signals across the physical media as bits. Exchanging frames, controlling media access, and performing error detection are all functions of the data link layer.

4. Which statement correctly describes frame encoding?

• It uses the characteristic of one wave to modify another wave.
• It transmits data signals along with a clock signal which occurs at evenly spaced time durations.
• It generates the electrical, optical, or wireless signals that represent the binary numbers of the frame.
• It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.

Explanation: Frame encoding converts a stream of data bits into a predefined code that is recognized by both the sender and receiver. These codes are used for a variety of purposes, such as distinguishing data bits from control bits, and identifying the beginning and end of a frame.

5. What is one advantage of using fiber-optic cabling rather than copper cabling?

• It is usually cheaper than copper cabling.
• It is able to be installed around sharp bends.
• It is easier to terminate and install than copper cabling.
• It is able to carry signals much farther than copper cabling.

Explanation: Copper cabling is usually cheaper and easier to install than fiber-optic cabling. However, fiber cables generally have a much greater signaling range than copper.

6. Which pairs of wires change termination order between the 568A and 568B standards?

• green and orange
• green and brown
• blue and brown
• brown and orange

Explanation: The difference between the 568A and 568B standards is the order in which the colored wire pairs are sequenced. It is the green and the orange pairs of wires that are swapped between the two standards.

7. What is the delay in the amount of time for data to travel between two points on a network?

Explanation: Latency is a term used to indicate delay when getting a packet from one point to another. Network connections with small amounts of delay are called low-latency networks, whereas network connections with long delays are called high-latency networks. High latency creates bottlenecks in any network communications.

8. What terms represent the maximum and actual speed that can be utilized by a device to transfer data?

• bandwidth; throughput
• throughput; bandwidth
• bandwidth; goodput
• throughput; goodput

Explanation: Bandwidth measures the maximum rate at which a device can transfer data. However, in practice, the actual speed for data transfer could be reduced because of numerous factors like network congestion, overhead etc. This actual rate of transfer is known as throughput.

9. Which type of network cable contains multiple copper wires and uses extra shielding to prevent interference?

• fiber-optic

Explanation: Shielded twisted-pair (STP) cables contain additional shielding and is commonly used when electromagnetic interference (EMI) or radio frequency interference (RFI) would negatively affect the data communication crossing a network cable.

10. What is line encoding?

• a method to represent digital information
• a security method used to protect data being transmitted
• a method to represent bits on the media
• a method to change the level of an electrical signal or optical pulse on the media

Explanation: Line encoding is a method of converting a stream of data bits into a predefined “code”. In other words, encoding is the method or pattern used to represent digital information.

11. What is a factor that determines the practical bandwidth of a network?

• physical media properties
• type of traffic
• amount of traffic
• latency caused by all intermediary devices

Explanation: A combination of factors influence the practical bandwidth of a network including the properties of the physical media as well as the technologies chosen for signaling and detecting network signals.

12. What are three options for signal transmission on a network? (Choose three.)

• radio waves
• vibration pulses
• sound waves
• electrical pulses
• light pulses

Explanation: There are three common methods of signal transmission used in networks:

• Electrical signals – Transmission is achieved by representing data as electrical pulses on copper wire.
• Optical signals – Transmission is achieved by converting the electrical signals into light pulses.
• Wireless signals – Transmission is achieved by using infrared, microwave, or radio waves through the air.

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Presentation Layer in Networking

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Questions and Answers

What is the primary function of the presentation layer in data communication.

Converting the syntax of data from one format to another for compatibility

Which protocol is commonly used for representing text-based data?

What does the ssl/tls protocol primarily provide in data communication.

Secure communication over the network by encrypting data

Which technology is used for structuring and representing data in a markup language format?

<p>XML</p> Signup and view all the answers

In terms of data conversion, what does the Presentation layer handle?

<p>Ensuring compatibility between different systems through syntax conversion</p> Signup and view all the answers

What is the purpose of ASCII in data communication?

<p>Character encoding scheme for text-based data</p> Signup and view all the answers

What is the primary function of the Presentation layer?

<p>To handle the syntax and semantics of data exchanged between applications</p> Signup and view all the answers

Which of the following services is NOT provided by the Presentation layer?

<p>Error detection and correction</p> Signup and view all the answers

What is the purpose of data translation in the Presentation layer?

<p>To convert data into a format that can be understood by different systems</p> Signup and view all the answers

Which statement about the Presentation layer is FALSE?

<p>It handles routing and addressing of data packets over the network</p> Signup and view all the answers

What is the purpose of data compression in the Presentation layer?

<p>To reduce the amount of data that needs to be transmitted over the network</p> Signup and view all the answers

Which of the following statements about the Presentation layer is correct?

<p>It allows different systems with varying data representations to communicate seamlessly</p> Signup and view all the answers

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