Understanding Computer Networks

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Questions and Answers

Which of the following best describes how data is transmitted in a packet-switched network?

  • Data is transmitted via a dedicated, physical connection between sender and receiver.
  • Data is sent as a single, unbroken stream from sender to receiver.
  • Data is encrypted and sent through a central server before reaching the recipient.
  • Data is divided into smaller packets, each processed independently and possibly taking different routes. (correct)

What is the primary role of Internet Service Providers (ISPs) in the context of IP addresses?

  • ISPs manufacture the hardware components used in network infrastructure.
  • ISPs create and enforce network security protocols for all internet traffic.
  • ISPs regulate the assignment of domain names globally.
  • ISPs assign IP addresses to network nodes, receiving them from regional Internet registries. (correct)

In a network, what is the significance of a 'node'?

  • It refers to the central server that manages all network traffic.
  • It denotes a software application designed to monitor network performance.
  • It is a specific type of cable used to connect different parts of the network.
  • It represents any device with a unique IP address that can send and receive data. (correct)

What is the role of checksums in packet-switched networks?

<p>To detect and correct errors that may occur during transmission. (C)</p> Signup and view all the answers

Which entities are responsible for the distribution and regulation of IP addresses in North America?

<p>ARIN and ICANN. (A)</p> Signup and view all the answers

In the context of packet-switched networks, what is the purpose of including metadata in each packet?

<p>To provide information such as sender and recipient addresses. (C)</p> Signup and view all the answers

Which of the following is a key characteristic of modern computer networks that utilize packet switching?

<p>They break data into smaller packets, allowing for independent processing and efficient resource sharing. (B)</p> Signup and view all the answers

How does packet switching contribute to efficient resource utilization in networks?

<p>By allowing multiple packets from different sources to share the same network link. (C)</p> Signup and view all the answers

What determines the unique identification of a device (node) on a network?

<p>IP address. (D)</p> Signup and view all the answers

Which of the following is NOT a benefit of using packet-switched networks?

<p>Guaranteed delivery time for all packets. (B)</p> Signup and view all the answers

Flashcards

What is a network?

A collection of computers and devices that send and receive data in real-time.

What is a 'node'?

Each device on a network, like a computer, printer, or router.

What do IP addresses do?

Uniquely identify each node on a network.

Who assigns IP addresses?

Assign addresses, which they receive from regional Internet registries.

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What are packet-switched networks?

Modern computer networks where data is broken into smaller packets and processed independently.

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What metadata do packets contain?

Sender and recipient's addresses.

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What is efficient resource sharing?

Multiple packets share the same network link, enabling simultaneous communication.

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What do packets include for data integrity checks?

Packets include these to detect and correct errors during transmission.

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What does ARIN do?

ARIN distributes IP addresses in North America.

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Why use packet-switched networks?

Modern computer networks break data into smaller units for efficient transmission.

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Study Notes

  • A network involves computers and devices that exchange data in real-time.
  • A "node" refers to any device on a network; examples include computers, printers, and routers.
  • Every node possesses a unique IP address.
  • IP addresses serve to uniquely identify nodes within a network.
  • Internet Service Providers (ISPs) assign network addresses.
  • ISPs obtain addresses from regional Internet registries.
  • In North America, IP address distribution is managed by ARIN (American Registry for Internet Numbers).
  • ICANN (Internet Corporation for Assigned Names and Numbers) regulates IP addresses in North America.

Packet-Switched Networks

  • Data in modern computer networks is broken into smaller packets, with each packet processed independently.
  • Every packet includes metadata, which contains sender and recipient addresses.
  • Multiple packets can utilize the same network link for simultaneous device communication, supporting efficient resource sharing.
  • Checksums are included in packets for data integrity during transmission, enabling error detection and correction.

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