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Questions and Answers
What is the primary purpose of computer networking?
What is the primary purpose of computer networking?
Which network category is the smallest and connects personal devices?
Which network category is the smallest and connects personal devices?
What type of network interconnects multiple buildings in a large organization?
What type of network interconnects multiple buildings in a large organization?
What is the primary function of the session layer in the OSI model?
What is the primary function of the session layer in the OSI model?
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Which of the following is NOT a common type of enterprise network mentioned?
Which of the following is NOT a common type of enterprise network mentioned?
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Which layer of the OSI model is responsible for converting messages from one code to another?
Which layer of the OSI model is responsible for converting messages from one code to another?
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What does the OSI model aim to achieve in networking?
What does the OSI model aim to achieve in networking?
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What is a Wide Area Network (WAN)?
What is a Wide Area Network (WAN)?
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Which network category would be used to connect traffic lights and parking meters across a city?
Which network category would be used to connect traffic lights and parking meters across a city?
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Which of the following best describes the application layer's role in the OSI model?
Which of the following best describes the application layer's role in the OSI model?
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Which layer of the OSI Model is responsible for ensuring end-to-end delivery of messages?
Which layer of the OSI Model is responsible for ensuring end-to-end delivery of messages?
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What is one of the main challenges that organizations face regarding computer networks?
What is one of the main challenges that organizations face regarding computer networks?
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What does the physical layer of the OSI model handle?
What does the physical layer of the OSI model handle?
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What functionality is primarily managed by the Data Link layer of the OSI Model?
What functionality is primarily managed by the Data Link layer of the OSI Model?
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Which type of network is specifically designed to connect computers within a single establishment like a corporate office?
Which type of network is specifically designed to connect computers within a single establishment like a corporate office?
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Which of the following devices is primarily associated with the data link layer of the OSI model?
Which of the following devices is primarily associated with the data link layer of the OSI model?
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What does the Network layer of the OSI Model do?
What does the Network layer of the OSI Model do?
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What is the biggest goal of computer networks?
What is the biggest goal of computer networks?
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What function is NOT associated with the OSI model?
What function is NOT associated with the OSI model?
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What role does the Physical layer of the OSI Model play?
What role does the Physical layer of the OSI Model play?
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Which layer is responsible for managing the flow of data in the OSI model?
Which layer is responsible for managing the flow of data in the OSI model?
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Which of the following layers is not part of the OSI Model?
Which of the following layers is not part of the OSI Model?
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What does the term 'MAC addressing' refer to?
What does the term 'MAC addressing' refer to?
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Which of the following best describes the role of the Application layer in the OSI Model?
Which of the following best describes the role of the Application layer in the OSI Model?
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What aspect can result in a bad signal when using network cabling?
What aspect can result in a bad signal when using network cabling?
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Which function is primarily handled by a switch in a network?
Which function is primarily handled by a switch in a network?
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What is one main responsibility of a server in a network?
What is one main responsibility of a server in a network?
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What is a key disadvantage of using a hub in a network?
What is a key disadvantage of using a hub in a network?
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Which device is primarily responsible for network security?
Which device is primarily responsible for network security?
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What type of network connection primarily uses radio signals?
What type of network connection primarily uses radio signals?
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Which type of device creates a broadband connection from a home network to an ISP?
Which type of device creates a broadband connection from a home network to an ISP?
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What is a disadvantage of wired networks compared to wireless networks?
What is a disadvantage of wired networks compared to wireless networks?
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What is a primary disadvantage of wireless networking compared to wired connections?
What is a primary disadvantage of wireless networking compared to wired connections?
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What is the role of a Wireless Access Point in a network?
What is the role of a Wireless Access Point in a network?
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What function does a Wi-Fi Modem fulfill in a network setup?
What function does a Wi-Fi Modem fulfill in a network setup?
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Which type of topology is the most common in modern LANs?
Which type of topology is the most common in modern LANs?
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What characterizes a Wireless Router?
What characterizes a Wireless Router?
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What is a key advantage of wired connections over wireless networks?
What is a key advantage of wired connections over wireless networks?
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What major factor affects the data transfer speed of Wireless Access Points?
What major factor affects the data transfer speed of Wireless Access Points?
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What issue is commonly associated with wireless networking?
What issue is commonly associated with wireless networking?
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What does a hub do with data it receives?
What does a hub do with data it receives?
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Which topology is described as the simplest form with a direct connection between two devices?
Which topology is described as the simplest form with a direct connection between two devices?
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What is a key disadvantage of using a token ring topology?
What is a key disadvantage of using a token ring topology?
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What is the primary function of a networking protocol in a LAN?
What is the primary function of a networking protocol in a LAN?
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Which topology allows messages to be transmitted at predetermined time intervals?
Which topology allows messages to be transmitted at predetermined time intervals?
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Which statement is true regarding mesh topology?
Which statement is true regarding mesh topology?
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What is one significant advantage of using a switch over a hub in a star network?
What is one significant advantage of using a switch over a hub in a star network?
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Which technology has recently replaced token ring topology?
Which technology has recently replaced token ring topology?
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Study Notes
Computer Networking
- Computer networking links computers for shared resources through the internet
- Networks allow web browsing, email, file sharing, image sharing, and downloading
- Organizations (companies, schools, governments) use networks for general purpose computing
- Networks categorized by geographic scope
Network Categories
- Personal Area Network (PAN): Smallest, connects personal devices (e.g., earbuds to phone, computer to printer)
- Local Area Network (LAN): Connects devices in a limited area (e.g., building, house) for shared resources
- Campus Area Network (CAN): Connects multiple buildings in a campus environment (e.g., universities)
- Metropolitan Area Network (MAN): Connects city buildings, devices, and wirelessly within a city area
- Wide Area Network (WAN): Largest, connecting vast areas (e.g., cities, countries); often composed of LANs and MANs
Network Architecture
- A diagram displaying network structure and services to meet connectivity needs
- Common enterprise network types:
- Access networks: Connect users and devices within a building or branch location
- Data center networks: Connect servers and applications for easy access
- Wide area networks (WANs): Connect users to various services and programs (e.g., hospital employees to health applications)
The Open Systems Interconnection (OSI) Model
- A seven-layer model for communication systems allowing different network types to interlink
- Layers describe networking functions, from physical to application level
- Aims for compatibility and advancement of networking technologies
OSI Model Layers
- Physical Layer: Electrical and mechanical connections to the network
- Data Link Layer: Handles error recovery, flow control, and sequencing; includes MAC addressing
- Network Layer: Network controller handling outgoing messages and routing information
- Transport Layer: End-to-end message integrity and delivery between devices
- Session Layer: Controls connections, starts, manages, and ends them
- Presentation Layer: Converts messages to appropriate formats for applications (e.g. encryption, compression)
- Application Layer: Interacts with applications for tasks such as web browsing and email
Network Types and Devices
- Wired Networks: Use cables and connectors for connections (e.g., LAN cables)
- Wireless Networks: Use radio signals for connections (e.g., Wi-Fi)
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Wired Devices:
- Hub: Interconnects devices but broadcasts all data; less privacy-focused
- Switch: Initiates a direct connection between devices
- Cable Modem: Connects home networks to the internet
- Servers: Provide resources, data, and programs to clients
- Firewall: Monitors and controls network traffic; establishes security policies
-
Wireless Devices:
- Access Point: Connects wireless devices and provides access to wired LANs
- Wireless Router: Connects wireless devices to other networks (e.g., internet)
Network Topologies
- Point-to-Point: Simplest; direct connection between two devices
- Token Ring: Each device has a fixed time interval for transmission
- Bus: Sharing media for communication in a single line; vulnerable to data transmission interruptions
- Star: Most common in LANs; all devices connect to a central switch or hub
- Mesh: Direct connection between all devices (fully) or through multiple paths between some devices (partially)
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Description
This quiz explores the fundamentals of computer networking, including its functions and various types of networks such as PAN, LAN, CAN, MAN, and WAN. Learn how organizations utilize these networks for shared resources and communication.
