Computer Networks Chapter 6: Connecting Devices
24 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary function of a hub in a network?

  • To act as a repeater and extend network length
  • To copy the received frame onto all other links (correct)
  • To divide a LAN into smaller segments
  • To filter and forward frames to specific destinations

    • What is a major disadvantage of using hubs to interconnect LAN segments?

  • Limited network scalability due to distance constraints
  • Increased network security risks due to broadcasting
  • Incompatibility with different Ethernet technologies
  • Reduced network performance due to increased collision domains (correct)

    • What is the main difference between a hub and a bridge?

  • A hub operates at the network layer, while a bridge operates at the data link layer
  • A hub is used to connect LANs with different physical layers, while a bridge is used to connect LANs with identical physical layers
  • A hub performs filtering, while a bridge does not
  • A hub sends received frames to all other interfaces, while a bridge performs filtering (correct)

    • What is a broadcast domain?

    <p>The part of the network where each NIC can 'see' other NICs' traffic broadcast messages</p> Signup and view all the answers

    What is a collision domain?

    <p>The part of the network where two or more nodes transmit at the same time, causing collisions</p> Signup and view all the answers

    What is the advantage of using multiple hubs to extend the network length?

    <p>It extends the maximum distance between nodes</p> Signup and view all the answers

    What is the purpose of a bridge in a network?

    <p>To divide a LAN into smaller LAN segments</p> Signup and view all the answers

    What is a characteristic of a bridge in contrast to a hub?

    <p>It performs filtering and does not send received frames to all other interfaces</p> Signup and view all the answers

    What is the main function of a repeater in a network?

    <p>To regenerate and transmit bits onto all other interfaces</p> Signup and view all the answers

    What type of device operates on frames or packets?

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

    What is the result of two nodes on connected segments transmitting at the same time in a network using repeaters?

    <p>Collision occurs</p> Signup and view all the answers

    What type of topology is used by a hub to connect stations?

    <p>Physical star</p> Signup and view all the answers

    What is the primary function of a bridge in a network?

    <p>To connect multiple networks</p> Signup and view all the answers

    Which of the following devices operates on the physical layer?

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

    What is the main advantage of using repeaters in a LAN?

    <p>Extended geographical LAN range</p> Signup and view all the answers

    How do hubs handle incoming bits from an adapter?

    <p>They send it to all other adapters</p> Signup and view all the answers

    What is the primary function of a bridge in a network?

    <p>To connect individual computers to a LAN</p> Signup and view all the answers

    What is the main advantage of cut-through switching over store-and-forward switching?

    <p>It reduces the latency through the switch</p> Signup and view all the answers

    What is the primary function of a router in a network?

    <p>To forward packets between different networks</p> Signup and view all the answers

    What is the main difference between a switch and a bridge?

    <p>A switch connects multiple LANs, while a bridge connects individual computers</p> Signup and view all the answers

    What is the primary advantage of store-and-forward switching over cut-through switching?

    <p>It provides error-checking before forwarding the frame</p> Signup and view all the answers

    What is the main difference between a router and a switch?

    <p>A router isolates both collision and broadcast domains, while a switch does not</p> Signup and view all the answers

    What is the main purpose of routing algorithms in routers?

    <p>To determine the best route for packet forwarding</p> Signup and view all the answers

    What is the primary function of a switch in a network?

    <p>To allow multiple devices to transmit simultaneously</p> Signup and view all the answers

    Study Notes

    Connecting Devices

    • Five types of connecting devices: Repeaters, Hubs, Bridges, Switches, and Routers
    • These devices separate or expand networks and operate at different layers of the OSI model

    Repeaters

    • Operate at the Physical Layer
    • Act on bits, not frames or packets
    • Receive a bit, regenerate it, and transmit it onto all other interfaces
    • Used in LANs to connect cable segments and extend the maximum cable length
    • Do not implement any access method, so collisions can occur

    Hubs

    • Operate at the Physical Layer
    • Act on bits, not frames
    • Receive a bit from an adapter and send it to all other adapters
    • Do not implement any access method or filtering
    • Form a single collision domain and broadcast domain
    • Can be used to extend the network length, but can reduce performance

    Bridges

    • Operate at the Data Link Layer (MAC address level)
    • Used to divide a LAN into smaller segments or connect LANs with identical physical and data link layers protocol
    • Each LAN segment is a separate collision domain
    • Perform filtering using a table to make decisions
    • Do not send received frames to all other interfaces like hubs and repeaters

    Switches

    • Operate at the Data Link Layer (MAC address level)
    • Used to connect individual computers, not LANs
    • Allow multiple devices to transmit simultaneously
    • Can operate in Full-duplex mode
    • Perform MAC address recognition and frame forwarding in hardware
    • Use different forwarding techniques, such as store-and-forward switching and cut-through switching

    Routers

    • Operate at the Network Layer
    • Deal with packets, not frames
    • Connect LANs and WANs with similar or different protocols
    • Isolate both collision domains and broadcast domains
    • Act like normal stations on a network, but have multiple network addresses
    • Communicate with each other and exchange routing information
    • Determine the best route using routing algorithms and special software

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz covers the functions of network devices, including repeaters, hubs, bridges, routers, and switches. It tests knowledge on connecting devices in computer networks.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser