Osi Model Exam Questions And Answers


  • The presentation layer translates bits into voltages for transmission across the physical link. Answer: A D Explanation The transport layer segments data into smaller pieces for transport. Each segment is assigned a sequence number, so that the...
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  • Packets are created when network layer encapsulates a segment not frame with source and destination host addresses and protocol-related control information. The Network layer Layer 3 has two key responsibilities. First, this layer controls the...
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  • What is the port no of DNS and Telnet? Segments are used at Transport Layer Give some examples of protocols that work at the Application layer? Which layer does CRC work? Cyclic Redundancy Check is used to detect errors in the network. What is the purpose of the Data Link? TCP is reliable. FTP port number 20 Data ; 21 for Control Which layer provides the logical addressing that routers will use for path determination? Network Layer Which layer specifies voltage, wire speed, and pinout cables and moves bits between devices? Physical Which layer combines bits into bytes and bytes into frames, uses MAC addressing, and provides error detection? Data Link Layer Which layer is responsible for keeping the data from different applications separate on the network? Session layer. Which layer segments and resembles data into a data stream? Transport layer.
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  • Which layer provides the physical transmission of the data and handles error notification, network topology, and flow control? Data Link Layer Which Layer manages device addressing, tracks the location of devices on the network, and determine the best way to move data? Network layer. How Data break down on each layer from top to bottom? Encapsulation occurs in the following format MAC address works on which layer? It is 4 bytes field. When a sending device sends data it put the data in a mathematical algorithm and it gets a product, sending device puts the product in FCS. When a receiving device receives data it also put the data in the same mathematical algorithm and gets a product. If both products are the same, Frame is accepted or else discarded.
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  • Which layer is responsible for converting data packets from the Data Link layer into electrical signals? Physical Layer At which layer is routing implemented, enabling connections and path selection between two end systems. Network Layer Which layer defines how data is formatted, presented, encoded, and converted for use on the network? Presentation Layer Which layer is responsible for creating, managing, and terminating sessions between applications? Session Layer DNS uses which protocol? Differentiate between forward Lookup and reverse lookup in DNS?
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  • What is the way to establish a TCP connection? TCP Connection is established using a three-way Handshake. What is the difference between flow control and error control? Error Controls the process of detecting and correcting both the bit and packet-level error. While flow control is a mechanism to ensure the efficient delivery of Data. Flow control is agreeing on the minimum amount of data that a receiver can handle at a time.
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  • You can test your skills on the functionalities of the OSI model in networking. Each question is provided with the correct answer and an explanation for the correct answer. Which of the following are the functions of the network layer of the OSI model? Encryption and Compression Delivery of packet from source to destination. All of the above Answer Answer: Option C. Explanation: The main function of the network layer in the OSI model is to deliver IP packet from source to destination. Encryption and compression occur in the presentation layer. Error detection and correction is done data link layer.
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  • Which of the network models are always discussed to understand the functionality of the network? Choose any two OSI Model.
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  • Hello Friends, i hope this msg finds you well there are some questions regarding OSI Model which i have many days and need to be answer i hope someone help me to get my answer Application Layer: when i start browsing google. Presentation Layer: A: when this layer is translating my bits to add Layer-6 header, how dose it knows remote site language? B: regarding compression, how dose it compress the data? Session Layer A: In this layer how my PC or application software start tracking the status before session is created? B: i login to my Facebook account in PC and shutdown the computer for 2 days or more immediately when i reopen browsers it seems that there is already session created cause Facebook dose not require authentication from me, it just logged in here how dose session layer tracking my session even my computer is not in network or switched on?
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  • Transport Layer A: imagine i am using a UDP protocol like gaming, since UDP dose not have feedback operation how transport layer detect missing part during segmentation? B: during flow control, someone has 1MBps Internet connection and mobile support 50MBps transmission, here when mobile devices or PC support higher bit rates it will send request for higher speed transmission from server according to Layer-4 OSI Model in this case i faced a confusion that when my devices request higher bit rate from server how the server send me data with higher speed when i don't have internet capacity? Network Layer in path determination how dose in layer finds the best path when my PC is creating Network Layer header? Physical Layer in physical layer which software or protocol is in charge of converting these signals to binary?
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  • Transport layer 1. It segments and reassemble data from upper-layer applications and combines it into the same data stream. It provides end-to-end data transport services. Establishes the logical connection between the sending host and destination host in an internetwork. It ensures Data integrity at the Transport layer by maintaining flow control. Network layer 1. The Network layer layer 3 manages device addressing. It tracks the location of devices on the network. It determines the best way to move data between devices that are not locally attached. Routers Functions at the Network layer to provide the routing services within an internetwork.
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  • Data link layer 1. The Data Link layer is responsible for the physical transmission of the data. It handles error notification, flow control. Data Link layer ensures that messages are delivered to the proper device on a LAN using mac addresses. It translates messages from the Network layer into bits for the Physical layer to transmit. The Data Link layer formats the message into the data frame and adds a customized header containing the hardware destination and source address. Which Layer is responsible for Reliable connection? Transport Layer.
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  • Both ping and tracert are used to find If the computer is in the network. True Ans: B What is the difference between ring and bus topology? In Ring, all nodes are connected with another in a loop while in the bus they are connected to a central cable B. In Ring, all nodes are connected with another loop while on a bus they are connected to a central cable C. In the bus, all nodes are connected with another in a loop while instar they are connected to a central node D. In Bus all nodes are connected with another loop while instar they are connected to a central cable Ans: A MAC addressing works in data link layer while IP addressing works in the network layer.
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  • It controls the flow of data Does not have an option for flow control of data Q4. Ans: Physical layer resembles the actual transfer of information from source to destination in the form bitstream — electrical impulse, light, or radio signal. In simple words, it accepts a frame from the data link layer and converts it into bits. It also accepts bits from the physical medium and converts it into the frame. Which layers perform error detection and flow control? Ans: On receiving and while transmission of information, Layer 2 — Data Link layer decoded and encoded data into bits. This layer also performs error checking and flow control. How the network administrator detect the problem? Experience in networking reduces the time to find problems and resolve them. Network problems may be a loose physical connection, configuration issues, etc. What is the difference between flow control and error control? While error control checks and correct errors in the data bits and packets.
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  • What is Data encapsulation? Ans: Data encapsulation is a process of adding extra information at each layer of the OSI model while information flow from one host to another host. Information such as source and destination address, protocol information, type of data etc. This layer controls the permission of data to transmit it. This layer controls frame synchronization, flow control, and error checking. What is the difference between half-duplex and full-duplex? Ans: In half-duplex, information can flow in both directions but not simultaneously. While in full-duplex, information can flow in both directions simultaneously.
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  • Ans- Open System Interconnection. The OSI reference model is used as a guide for teaching and understanding the way networks operate. Q2- What are the layers of the OSI model? Ans- Network. At the network layer, data is transported in the form of a packet. Q4- Which of the following takes place at the presentation layer?
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  • Ans- Encryption. The presentation layer encrypts data to be sent across the network, and decrypts it so that it can be accessed by the application layer on the receiving end. Ans- Windowing. Quality of Service and user authentication are also handled by the application layer. Ans- Data Link Layer. Q7- How can data be transported in different layers? Ans- Data is transported in bits at the Physical layer. A bit is simply a binary digit. Either a 0 or a 1. Data is transported in segments at the Data Link layer. At the data link layer, user data is encapsulated in a frame. Q8- What is the function of Network Layer? Ans- The network layer establishes the route between the sender and receiver across switching points, which are typically routers. IPX, SNA and AppleTalk are other examples of routable protocols, which mean that they include a network address and a station address in their addressing system.
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  • This layer is also the switching function of the dial-up telephone system. If all stations are contained within a single network segment, then the routing capability in this layer is not required. Q9- The link for a switch connection is isolated from other data traffic except for what type of messages? Ans- Following are the types of messagesi. Multicast Messages — Message are sent to a specific group of hosts on the network. Q Why are the layers of the OSI model important to the network administrator?
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  • To troubleshoot network problems by verifying functionality of each layer. In many cases it requires the network administrator to isolate at what layer the network problem occurs.
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  • C Star. FDDI used which type of physical topology? A Bus. And much more! Computer analogue design All of the above. Important Study Material. Downloading will be start. We will keep adding more questions and provide this question bank in PDF format, so that you can download them instantly in E-book style. Multiple Choice Questions of Computer Networking. He has written a number of books ranging from computer fundamentals to programming languages, and several books for competitive exams in banking and other sectors. This era is completely working with computers, so all the candidates have awareness about computers. Usually, LAN covers an organization offices, schools, colleges or universities.
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  • Take up the quiz below and test how much you understood about networks and how they are set up. Set of protocols c. And you can download this book free of cost. Network topology in which the computers connect to a backbone cable segment to form a straight line is called: A. Explanation are given for understanding. Online MCQs learn these basics computer mcq with computer awareness questions and answers.
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  • A File transfer protocol. Download for offline reading, highlight, bookmark or take notes while you read Computer Networks Multiple Choice Questions and Local Area Network A computer network spanned inside a building and operated under single administrative system is generally termed as Local Area Network LAN. Computer application in design d. Analog computer was invented by. IP addresses are 32 bit long, hierarchical addressing scheme. So dear reader I have provided top expected gk questions from input and output device of computer. A computer network is an interconnected collection of i autonomous computers ii network nodes iii mainframe computers iv personal computers.
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  • RFC D. The best-known computer network is the Internet. Computer Networking multiple choice questions and answers PDF for freshers and experienced. All you need to do is download the training document, open it and start learning computer basic for free. Now a day computer is one of the most important field for every examinations. A computer network that covers a broad area i. This course provides a broad introduction to computer networking. Here you can access and discuss Multiple choice questions and answers for various competitive exams and interviews.
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