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Questions and Answers
What is the primary purpose of a Wide Area Network (WAN)?
What is the primary purpose of a Wide Area Network (WAN)?
Which layer of the OSI model is responsible for end-to-end delivery between devices?
Which layer of the OSI model is responsible for end-to-end delivery between devices?
Which function is performed by the Data Link layer in the OSI model?
Which function is performed by the Data Link layer in the OSI model?
What is a Personal Area Network (PAN)?
What is a Personal Area Network (PAN)?
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In the OSI model, what does the Physical layer provide?
In the OSI model, what does the Physical layer provide?
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What is the role of the Network layer in the OSI model?
What is the role of the Network layer in the OSI model?
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Which type of network is specifically used within a campus environment?
Which type of network is specifically used within a campus environment?
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What is the primary purpose of computer networking?
What is the primary purpose of computer networking?
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Which network category connects devices over several city buildings?
Which network category connects devices over several city buildings?
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What are access networks primarily used for in computer networking?
What are access networks primarily used for in computer networking?
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Study Notes
Computer Networking Concepts
- Computer networking connects computers for shared resources via the internet.
- Sharing resources includes browsing the web, sending/receiving email, sharing files, and downloading media.
- Organizations (companies, schools, government) often use networks for tasks like word processing, science computing, and control systems.
Network Categories by Geography
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Personal Area Network (PAN): Smallest network, connecting compatible personal devices (e.g., headphones to phone, computer to printer).
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Local Area Network (LAN): Connects computers in a limited area (a building, house, or group of buildings).
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Campus Area Network (CAN): Connects buildings in a campus environment (universities, large organizations).
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Metropolitan Area Network (MAN): Connects buildings across a city (e.g., traffic lights, parking meters).
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Wide Area Network (WAN): Largest network, covering vast areas (cities, provinces, countries), often combining LANs and MANs.
Network Architecture
- Network architecture is a diagram showing network structure and services to meet client needs.
- Common network architectures focus on client needs.
- Access Networks: Connect users and devices together.
- Data Center Networks: Connect servers for data access.
- Wide-Area Networks (WANs): Connect users to programs and services.
The OSI Model
- The Open Systems Interconnection (OSI) model is a layered networking standard for communication.
- Physical Layer: Provides the electrical and mechanical interface to the network.
- Data Link Layer: Manages error recovery, flow control
- Network Layer: Acts as the network controller (routing)
- Transport Layer: Handles end-to-end message delivery.
- Session Layer: Manages connection setup and teardown.
- Presentation Layer: Formats and codes data.
- Application Layer: Handles user application requests like browsing, sending email.
Wired Network Devices & Wireless Devices
- LAN Ethernet Cable: Connects devices within a local area, limited by length and cable quality.
- Hub: Connects multiple devices, but broadcasts traffic to all connected devices.
- Switch: Connects devices directly, improving privacy.
- Cable Modem: Connects home network to internet service provider (ISP).
- Servers: Provide resources, data, and services to other computers.
- Firewalls: Security devices monitoring network traffic.
- Wireless Access Point: Connects wireless devices to a wired network.
- Wireless Routers: Combines router/switch/access point functionality (common in home networking).
Network Topologies
- Point-to-Point: Two devices directly connected.
- Token Ring: Access to transmissions is regulated.
- Bus Topology: Computers share the same transmission media (coaxial cable).
- Star Topology: All devices connect to a central switch or hub; commonly seen in LANs today.
- Mesh Topology: Devices are directly interconnected; can be fully meshed or partially meshed.
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Description
Explore the fundamentals of computer networking, including the various types of networks based on geographic scope. Learn about Personal Area Networks (PAN), Local Area Networks (LAN), and wider categories like Metropolitan and Wide Area Networks. This quiz will enhance your understanding of how organizations utilize these networks for resource sharing.
