Computer Networking Concepts Quiz
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Questions and Answers

What is the primary function of network architecture?

  • To display the structure of network devices and services (correct)
  • To create software applications for networking
  • To establish security measures for data protection
  • To enhance computer hardware performance

Which type of network is characterized by its limited geographic scope?

  • Campus Area Network (CAN)
  • Wide Area Network (WAN)
  • Local Area Network (LAN) (correct)
  • Metropolitan Area Network (MAN)

In which type of network are personal devices like smartphones connected?

  • Local Area Network (LAN)
  • Campus Area Network (CAN)
  • Metropolitan Area Network (MAN)
  • Personal Area Network (PAN) (correct)

What is one of the primary goals of computer networks?

<p>To fulfill client connectivity needs (B)</p> Signup and view all the answers

Which network connects multiple buildings across a campus environment?

<p>Campus Area Network (CAN) (C)</p> Signup and view all the answers

Which category of network involves linking multiple city buildings and devices?

<p>Metropolitan Area Network (MAN) (D)</p> Signup and view all the answers

Which type of network is commonly used for data center connectivity?

<p>Access networks (D)</p> Signup and view all the answers

What is NOT a typical use of computer networking?

<p>Tracking holiday shopping (C)</p> Signup and view all the answers

What is a significant disadvantage of using a hub in a network?

<p>It risks broadcasting data to all connected devices. (A)</p> Signup and view all the answers

How does a switch differ from a hub in network management?

<p>A switch bypasses data traffic to enhance data privacy. (B)</p> Signup and view all the answers

What role do servers play in a computer network?

<p>They provide resources, data, services, and programs. (A)</p> Signup and view all the answers

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

<p>To monitor and secure network traffic. (D)</p> Signup and view all the answers

Which network type uses radio signals to initiate connections?

<p>Wireless Network (B)</p> Signup and view all the answers

What is a key requirement for using a cable modem effectively?

<p>It requires a splitter for cable TV and internet services. (A)</p> Signup and view all the answers

What does the Presentation layer of a network do?

<p>It converts data protocols and translates data. (A)</p> Signup and view all the answers

What is a common limitation of using long cables in a network?

<p>Potential for poor signal and data loss. (C)</p> Signup and view all the answers

What is the advantage of a wired network compared to a wireless network?

<p>Not susceptible to outside interference (D)</p> Signup and view all the answers

Which device typically functions as the central point in a star topology?

<p>Switch (A)</p> Signup and view all the answers

What is a characteristic of a wireless router?

<p>Uses radio frequency to link devices (B)</p> Signup and view all the answers

What is one of the main disadvantages of using wireless networks?

<p>Data transfer relies on the technology of clients (A)</p> Signup and view all the answers

What type of network device combines the functionality of both a modem and a router?

<p>Wi-Fi Modem (B)</p> Signup and view all the answers

Which of the following is a drawback of wired networks?

<p>Higher setup costs (B)</p> Signup and view all the answers

Why are bus topologies rarely used in modern networks?

<p>They have scalability issues (B)</p> Signup and view all the answers

What is a primary factor that affects user mobility in networks?

<p>Wired versus wireless technology (C)</p> Signup and view all the answers

What is the primary purpose of a Wide Area Network (WAN)?

<p>To connect users over vast geographical areas (D)</p> Signup and view all the answers

Which layer of the OSI Model provides electrical and mechanical connections to the network?

<p>Physical layer (C)</p> Signup and view all the answers

What does the Data link layer primarily handle in the OSI Model?

<p>Error recovery and flow control (C)</p> Signup and view all the answers

In the context of the OSI Model, what is the role of the Transport layer?

<p>Providing a stable end-to-end connection (A)</p> Signup and view all the answers

What type of networks does a WAN consist of?

<p>A larger network composed of LANs and MANs (A)</p> Signup and view all the answers

Which layer of the OSI Model is responsible for segmenting and reassembling packets?

<p>Transport layer (C)</p> Signup and view all the answers

What does the Network layer do within the OSI Model?

<p>Receives and combines messages into packets with routing info (A)</p> Signup and view all the answers

Which of the following statements is true regarding the OSI Model?

<p>The OSI Model has seven distinct layers. (C)</p> Signup and view all the answers

What is the main disadvantage of using a hub in a network?

<p>It broadcasts all data to connected devices. (C)</p> Signup and view all the answers

Which topology provides a direct connection between two devices?

<p>Point-to-Point (A)</p> Signup and view all the answers

What characterizes a fully meshed topology?

<p>Each device is directly connected to every other device. (A)</p> Signup and view all the answers

What has recently replaced token ring topology in networking?

<p>Ethernet technology (D)</p> Signup and view all the answers

What is the primary function of the session layer in the OSI model?

<p>Handles control functions for managing connections. (C)</p> Signup and view all the answers

Why is using a switch in a star network considered more ideal than using a hub?

<p>A switch isolates data traffic better than a hub. (A)</p> Signup and view all the answers

Which layer is responsible for converting messages from one code to another?

<p>Presentation layer (B)</p> Signup and view all the answers

What is one of the main goals of the OSI reference model?

<p>To provide a structure for networking. (B)</p> Signup and view all the answers

How can mesh topology be classified?

<p>By the number of paths between end devices. (D)</p> Signup and view all the answers

What occurs in a bus topology?

<p>Computers share the media using coaxial cable. (B)</p> Signup and view all the answers

Which layer of the OSI model directly interacts with user applications like web browsers?

<p>Application layer (B)</p> Signup and view all the answers

Which of the following layers in the OSI model is responsible for the physical connection to the network?

<p>Physical layer (C)</p> Signup and view all the answers

What happens if an error changes the token pattern in a Token Ring network?

<p>Data traffic may stop circulating. (B)</p> Signup and view all the answers

What type of device is an Ethernet cable categorized under in the context of OSI layers?

<p>Physical Layer Device (C)</p> Signup and view all the answers

Which layer of the OSI model is responsible for the flow of data within a local area network?

<p>Data Link layer (A)</p> Signup and view all the answers

Which of the following is NOT a function associated with the presentation layer?

<p>Understanding requests (A)</p> Signup and view all the answers

Flashcards

Network Architecture

A visual representation of a network's structure and components to support client connectivity.

Computer Networking

Connecting computers to share resources over a network.

Personal Area Network (PAN)

A very small network that connects personal devices such as phones and headphones.

Local Area Network (LAN)

A network connecting devices within a limited area like a house or building.

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Campus Area Network (CAN)

A network that connects buildings on a university campus or large organization.

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Metropolitan Area Network (MAN)

A network covering a city or metropolitan area.

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Network categories

Classifying networks based on their geographic reach (size).

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Network Goals

The core purpose of computer networks is to enable client connectivity and resource sharing.

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WAN

A network covering a large area, connecting users to services across cities, provinces, or even countries.

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OSI Model

A standard model describing how different networks communicate with each other, organized into 7 layers.

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Physical Layer

The lowest layer of the OSI model, responsible for electrical and mechanical connections to the network.

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Data Link Layer

The layer responsible for error recovery, flow control, and sequencing of data transmission.

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Network Layer

The layer responsible for routing data between networks, combining messages into packets.

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Transport Layer

The layer responsible for end-to-end delivery of data between devices, ensuring data integrity.

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Media Access Control (MAC)

A sub-layer of the Data Link Layer that defines unique addresses for devices on a network.

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Packet

A unit of data sent over a network, containing information about where it's going and what it's carrying.

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Session Layer

Manages communication sessions between applications, controlling the start, management, and end of data exchanges.

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Presentation Layer

Formats and structures data for applications, handling conversion, compression, and encryption.

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Application Layer

Interacts with software applications, handling user requests, managing data retrieval, and providing communication services.

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What is a network?

A group of interconnected devices, like computers and phones, that share resources and communicate with each other.

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What makes a network cable bad?

A network cable that's too long or has poor quality can cause a weak signal.

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What does a hub do?

A hub connects multiple network devices but sends all data to every device, creating potential for slowness and security risks.

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What does a switch do?

A switch provides direct connections between devices, improving speed and security compared to a hub.

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Cable modem: How does it work?

A cable modem uses a cable connection to establish a broadband internet connection from your home to the internet service provider.

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What do servers do?

Servers provide resources, data, services, and programs to other computers or clients over a network.

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What is a firewall's role?

A firewall acts as a security barrier between your private network and the public internet, monitoring and controlling incoming and outgoing traffic.

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What are the two main types of networks?

Wired networks use physical cables to connect devices, while wireless networks use radio signals.

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What is a Hub?

A multi-port repeater that broadcasts data to all connected devices.

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What is a Switch?

A networking device that directs data only to the intended recipient, improving efficiency and security.

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LAN Network

A network connecting computers and devices in a limited area, usually within a building.

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Point-to-Point Topology

The simplest network topology where two devices communicate directly, creating a direct connection.

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Bus Topology

Computers share a single cable to transmit data, allowing all devices to access the network.

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Mesh Topology

A network where all devices have multiple paths to connect, creating redundancy and resilience.

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Token Ring Topology

A network where each device takes turns accessing the shared communication medium, ensuring fair access.

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Wireless Access Point

A device that allows wireless devices to connect to a wired network. It provides a connection to a wired LAN and relies on the wireless technology of connected devices for data transfer speed.

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Wireless Router

Combines a router, switch, and wireless access point to connect wireless devices to the internet. It uses radio frequency to connect devices to a network, making it the most common way to set up wireless networks.

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Wi-Fi Modem

A device that combines a modem and a router, simplifying internet connectivity. It acts as a single device to connect to the internet and provide a wireless network.

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Star topology

A networking topology where all devices connect to a central hub or switch. This type of topology is commonly used in LANs today.

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Wired Network Advantages

Wired networks offer faster data transfer speeds, are less susceptible to interference, and have inexpensive setup costs. However, you cannot move around with your devices without physically connecting them.

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Wireless Network Advantages

Wireless networks offer simple installation, user mobility, and flexibility. However, they may experience slower data transfer speeds and security issues.

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Why are bus topologies rarely used today?

Bus topologies are rarely used in modern networks because they are less efficient. Data collisions can occur when multiple devices try to transmit data simultaneously, leading to slowdowns and interruptions.

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Study Notes

Computer Networking Key Concepts

  • Computer networks connect computers for shared resources, like internet access, browsing, emailing, file sharing, and more.
  • Organizations (companies, schools, etc.) use networks for tasks like word processing, data analysis, and control systems.

Network Categories

  • Personal Area Network (PAN): Smallest network, connects personal devices like phones, headphones, etc., with limited span.
  • Local Area Network (LAN): Connects devices in a limited area like a building, house or nearby buildings. Shares resources in the area.
  • Campus Area Network (CAN): Connects buildings on a campus or large organization.
  • Metropolitan Area Network (MAN): Connects city buildings, infrastructure (traffic lights, parking meters), etc., across a metropolitan area.
  • Wide Area Network (WAN): Largest network, spans cities, provinces, and countries. Consists of LANs and MANs.

Network Architecture

  • Network architecture diagrams show network structure (devices and services).
  • It is designed to satisfy clients' needs.

Common Network Architectures

  • Access Networks: Connect users and devices in a company building.
  • Data Center Networks: Link servers and applications for easy user access.
  • Wide Area Networks (WANs): Connect users to programs and services (hospital software, etc.).

The Open Systems Interconnection (OSI) Model

  • The OSI model is a standard for network interaction.
  • It has seven layers with specific functions (electrical connections, flow control, data delivery, etc.).

Layers of the OSI Model

  • Physical Layer deals with electrical and mechanical connections.
  • Data Link Layer: handles error recovery, flow control, and sequencing for terminals (MAC addresses).
  • Network Layer: acts as a controller receiving, segmenting, and handling outgoing messages.
  • Transport Layer: responsible for end-to-end delivery and deals with message integrity.
  • Session Layer controls and terminates connections to satisfy user requests.
  • Presentation Layer: converts messages, handles data compression, and encryption
  • Application Layer: interacts with applications.

Network Types and Devices

  • Wired Networks: Use cables and connectors for connections.
  • Wireless Networks: Use radio signals for connections, becoming more common.
  • Wired Network Devices:
  • LAN Ethernet Cable: connects devices within a local area.
  • Hub: connects devices, but broadcasts data to all devices
  • Switch: provides direct connection from sender to receiver.
  • Cable Modem: uses cable connection for broadband.
  • Servers: provide resources, data, services, etc. to clients.
  • Firewalls: security devices, monitor and secure data traffic.
  • Wireless Network Devices:
  • Wireless Access Point (WAP): connects wireless devices to wired networks.
  • Wireless Router: combines router, switch, and WAP to connect wireless devices.

Network Topologies

  • Point-to-Point Network: simple network connection between two devices
  • Token Ring Network: deterministic network with fixed message times for accessing communications
  • Bus Network: devices share a common cable for media transmission
  • Star Network: most common, all devices connect to a central device (hub or switch)
  • Mesh Network: Each device is directly connected, more robust with several paths for communication.

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Computer Networking Concepts PDF

Description

Test your knowledge on the key concepts of computer networking, including the different categories of networks such as PAN, LAN, CAN, MAN, and WAN. Discover how organizations utilize networks for various tasks and the importance of network architecture.

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