Computer Network Overview and OSI Model
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Questions and Answers

Which cable is specifically used for directly connecting computers without an intermediary device?

  • Patch cable
  • Rollover cable
  • Straight through cable
  • Crossover cable (correct)

    • What sequence represents the proper color code for T568A wiring standard?

  • White/Green, Green, White/Orange, Blue, White/Blue, Orange, White/Brown, Brown
  • White/Green, Green, White/Blue, Blue, White/Orange, Orange, White/Brown, Brown
  • White/Green, Green, White/Orange, Blue, White/Brown, Brown, White/Blue, Orange
  • White/Green, Green, White/Orange, Orange, White/Blue, Blue, White/Brown, Brown (correct)

    • What distinguishes the T568A wiring standard from T568B?

  • Types of connectors used
  • Number of wires in the cable
  • Differences in color code sequence (correct)
  • Length of the wires used

    • Which metric is commonly utilized to express data transfer speed?

    <p>Mb/s</p> Signup and view all the answers

    What does the acronym 'bps' refer to in data transfer terminology?

    <p>bits per second</p> Signup and view all the answers

    Which layer of the OSI model is responsible for detecting and controlling transmission errors?

    <p>Data Link</p> Signup and view all the answers

    What function of the data link layer helps prevent fast senders from overwhelming slow receivers?

    <p>Regulating the flow of data</p> Signup and view all the answers

    What is the term used to describe a data unit at the data link layer?

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

    What is the correct bit sequence to be transmitted using CRC with G(x) = x3+1 for the original data 10100011?

    <p>10100011 101</p> Signup and view all the answers

    Which protocol is used to convert IP addresses to MAC addresses?

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

    What type of device forwards data based on the destination MAC address?

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

    Which of the following is a characteristic of a Switch?

    <p>Plug-and-play and Self-learning</p> Signup and view all the answers

    Which method is commonly applied for managing multiple accesses in a computer network?

    <p>Random access</p> Signup and view all the answers

    Which random accessing protocol is applied at the MAC layer of a computer network?

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

    Which statement accurately describes the Slotted ALOHA protocol?

    <p>Time is divided into slots, and nodes transmit data at the start of each time-slot.</p> Signup and view all the answers

    How many bits are there in a MAC address?

    <p>48 bits</p> Signup and view all the answers

    Which of the following addresses represents a physical address?

    <p>0F-1F-2F-3F-4F-5F</p> Signup and view all the answers

    What is a unique identifier assigned to a network interface controller?

    <p>MAC address</p> Signup and view all the answers

    What is the transmitted bit sequence using byte stuffing with the original data 00001111 00110011 01111110 and FLAG = 01111110?

    <p>00001111 00001111 00110011 00001111 01111110</p> Signup and view all the answers

    What is the transmitted bit sequence with byte stuffing using the original data 10000011 00001111 01111110?

    <p>10000011 00001111 00001111 00001111 01111110</p> Signup and view all the answers

    What is the original data from the received bit sequence 10111110 0000111 00001111 0000111 01111110 00110011?

    <p>00001111 10111110 01111110 00110011</p> Signup and view all the answers

    What byte is used as an escape for byte stuffing during framing techniques?

    <p>00001111</p> Signup and view all the answers

    Which of the following correctly describes the significance of a FLAG byte in framing techniques?

    <p>It marks the beginning of the data frame.</p> Signup and view all the answers

    What is the size of all telnet operations sent?

    <p>8 bits</p> Signup and view all the answers

    Which service is considered time-sensitive?

    <p>Internet telephony</p> Signup and view all the answers

    Which of the following is NOT a transport service available to applications?

    <p>All of the mentioned</p> Signup and view all the answers

    What application layer protocol is used by the email service?

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

    What translates internet domain and host names to IP addresses?

    <p>Domain name system</p> Signup and view all the answers

    Which protocol allows users to pass keystrokes from local host to remote host?

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

    What does the application layer protocol define?

    <p>All of the mentioned</p> Signup and view all the answers

    What is the name of the ASCII encoding of binary data?

    <p>Base 64 encoding</p> Signup and view all the answers

    What is included in the checksum computation of an IPv4 header?

    <p>IPv4 header only</p> Signup and view all the answers

    What is the binary format of the IP address 192.168.1.1?

    <p>11000000.10101000.00000001.00000001</p> Signup and view all the answers

    Which of the following correctly describes the parts of an IPv4 address?

    <p>Network – Host</p> Signup and view all the answers

    Which of the following is considered a special IPv4 address?

    <p>0.0.0.0</p> Signup and view all the answers

    What is the loopback address of a computer in IPv4?

    <p>127.0.0.1</p> Signup and view all the answers

    Which queuing model is applied for packet scheduling inside a router?

    <p>First-in-First-out (FIFO)</p> Signup and view all the answers

    What does a Time-To-Live (TTL) value of 100 signify for an IPv4 packet?

    <p>The IP packet could traverse a maximum of 100 hops</p> Signup and view all the answers

    What is the standard size of an IPv4 header?

    <p>20 bytes</p> Signup and view all the answers

    What is the main problem that the Bellman-Ford routing algorithm can encounter?

    <p>Count to Infinity</p> Signup and view all the answers

    Which of the following statements accurately describes the construction of distance vectors in Bellman-Ford routing?

    <p>Each network node constructs its distance vector based on routing information shared among neighbors.</p> Signup and view all the answers

    Which routing protocols are specifically suitable for intra-AS routing?

    <p>RIP/OSPF/IGRP</p> Signup and view all the answers

    In the Bellman-Ford protocol, how many iterations are needed to reach a stable state if the link cost between nodes changes from 4 to 60?

    <p>44</p> Signup and view all the answers

    Which of the following routing protocols is intended for inter-AS routing?

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

    Which protocol is primarily used for error reporting within a computer network?

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

    What is a characteristic of a managed device in a network management framework?

    <p>It contains multiple managed objects.</p> Signup and view all the answers

    Which of the following is NOT a suitable protocol for intra-AS routing?

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

    Study Notes

    Exam Information

    • Exam title: Computer Network
    • Exam date: 2021-2022
    • Institution: Computer Network (Trường Đại học Công nghệ Thông tin và Truyền thông Việt - Hàn)

    General Computer Network Information

    • A computer network is a collection of hardware components and computers interconnected by communication channels.
    • It allows for resource and information sharing.
    • ARPANET is considered the first computer network.

    OSI Model Layers

    • The OSI model has seven layers.
    • Host-to-host layers are Transport, Session, Presentation, Application.

    OSI Model Layer Detail

    • The presentation layer handles the syntax and semantics of information transmitted.
    • The network layer determines how packets are routed.

    TCP/IP Model Layers

    • The TCP/IP model has four layers.

    Network Types

    • PAN (Personal Area Network) – within a building or campus
    • LAN (Local Area Network) – within a building or campus
    • MAN (Metropolitan Area Network) – covering a city
    • WAN (Wide Area Network) – spanning states, countries, or the whole world

    Data Units

    • Bit is the fundamental unit in the physical layer.
    • Frame is a data unit in the data link layer.
    • Packet is a data unit in the network layer.
    • Segment is a data unit in the transport layer.

    Network Hardware

    • Hub operates at the physical layer.
    • Switch operates at the data link layer.
    • Router operates at the network layer.

    Common Network Commands

    • Ping tests network reachability of a device.
    • Ipconfig manages IP address assigned to the machine.

    Cable Types

    • Twisted pair cables reduce cross-talk interference.
    • Fiber optic cables are not affected by electromagnetic interference

    Network Protocols

    • Ethernet is the standard protocol for Ethernet networks
    • Wi-Fi is the standard protocol for Wi-Fi networks

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    Related Documents

    Computer Network Past Paper 2021-2022 PDF

    Description

    This quiz covers essential concepts of computer networks, including the OSI model and TCP/IP layers. Evaluate your understanding of different network types such as LAN, WAN, and PAN. Perfect for students preparing for assessments in computer networking.

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