Computer Networks: Hubs and Bridges
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Questions and Answers

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

  • To manage data transfers and connect to a WAN
  • To concentrate hosts and allow the network to see them as a single unit (correct)
  • To control network security and access rules
  • To regenerate signals and convert data transmission formats

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

  • A bridge converts data transmission formats, but a switch does not (correct)
  • A switch can regenerate signals, but a bridge cannot
  • A switch can convert data transmission formats, but a bridge cannot
  • A bridge connects to a WAN, but a switch does not

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

  • To concentrate hosts and allow the network to see them as a single unit
  • To regenerate signals and convert data transmission formats (correct)
  • To control network security and access rules
  • To manage data transfers and connect to a WAN

    • What is the main function of a gateway in telecommunications?

    <p>To allow data to flow from one discrete network to another</p> Signup and view all the answers

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

    <p>To control network security and access rules</p> Signup and view all the answers

    What is a characteristic of active hubs?

    <p>They regenerate signals and concentrate hosts</p> Signup and view all the answers

    What is a key difference between a gateway and a router?

    <p>A gateway communicates using more than one protocol</p> Signup and view all the answers

    What is a key role that firewalls play in network security?

    <p>To reject access requests from unrecognized sources</p> Signup and view all the answers

    Study Notes

    Network Devices

    • Hubs concentrate on connections, grouping hosts together, and allowing the network to see them as a single unit, with active hubs also regenerating signals.
    • Hubs do not affect data transmission, working passively.

    Bridges

    • Bridges convert network data formats and perform basic data transmission management.
    • They provide connections between LANs, checking data to determine if it should cross the bridge, making each part of the network more efficient.

    Switches

    • Switches add intelligence to data transfer management, determining if data should remain on a LAN.
    • They transfer data only to the connection that needs it, without converting data transmission formats.

    Routers

    • Routers have all the capabilities of hubs, bridges, and switches.
    • They can regenerate signals, concentrate multiple connections, convert data transmission formats, and manage data transfers.
    • Routers can also connect to a WAN, connecting LANs separated by great distances.

    Gateways

    • Gateways are networking hardware that allows data to flow from one discrete network to another.
    • They communicate using more than one protocol to connect multiple networks, distinct from routers or switches.

    Firewalls

    • Firewalls are network devices or software controlling network security and access rules.
    • They are inserted between internal networks and external networks like the Internet, rejecting access requests from unrecognized sources.
    • Firewalls play a vital role in network security, growing in importance with the increase in cyber attacks.

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    Description

    Learn about the roles of hubs and bridges in computer networks, including their functions and differences.

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