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Questions and Answers
Which of the following is NOT a characteristic of wired networks?
Which of the following is NOT a characteristic of wired networks?
What advantage do wireless networks have over wired ones?
What advantage do wireless networks have over wired ones?
Which device is primarily used to connect wireless devices to a wired LAN?
Which device is primarily used to connect wireless devices to a wired LAN?
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 layer of the OSI model handles data compression and encryption?
Which layer of the OSI model handles data compression and encryption?
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Which networking topology is most commonly used in modern LANs?
Which networking topology is most commonly used in modern LANs?
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Which of the following layers is responsible for establishing a connection to enable data flow between applications?
Which of the following layers is responsible for establishing a connection to enable data flow between applications?
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What is one major disadvantage of wireless networks?
What is one major disadvantage of wireless networks?
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What is the key purpose of the OSI reference model?
What is the key purpose of the OSI reference model?
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Which of the following devices combines the functionalities of a modem and a router?
Which of the following devices combines the functionalities of a modem and a router?
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What is a key feature of a Wireless Router?
What is a key feature of a Wireless Router?
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Which device would primarily function at the Physical layer of the OSI model?
Which device would primarily function at the Physical layer of the OSI model?
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What role does the Application layer serve in the OSI model?
What role does the Application layer serve in the OSI model?
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Which topology typically uses a central device to connect all its nodes?
Which topology typically uses a central device to connect all its nodes?
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What is the function of the Data Link layer in the OSI model?
What is the function of the Data Link layer in the OSI model?
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In the OSI model, what does the Physical layer primarily deal with?
In the OSI model, what does the Physical layer primarily deal with?
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What does a Wide Area Network (WAN) primarily connect?
What does a Wide Area Network (WAN) primarily connect?
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Which layer of the OSI model is responsible for error recovery and flow control?
Which layer of the OSI model is responsible for error recovery and flow control?
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What function does the network layer of the OSI model perform?
What function does the network layer of the OSI model perform?
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Which OSI layer is concerned with the integrity of messages during their transfer?
Which OSI layer is concerned with the integrity of messages during their transfer?
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What is the primary characteristic of a WAN compared to LANs and MANs?
What is the primary characteristic of a WAN compared to LANs and MANs?
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Which layer of the OSI model is directly above the transport layer?
Which layer of the OSI model is directly above the transport layer?
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What aspect does the physical layer of the OSI model focus on?
What aspect does the physical layer of the OSI model focus on?
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Which element is NOT a function of the transport layer?
Which element is NOT a function of the transport layer?
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What is the primary function of a computer network?
What is the primary function of a computer network?
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Which type of network connects devices over the smallest geographic area?
Which type of network connects devices over the smallest geographic area?
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What best describes a Campus Area Network (CAN)?
What best describes a Campus Area Network (CAN)?
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Which of the following networks would cover multiple city buildings and traffic infrastructure?
Which of the following networks would cover multiple city buildings and traffic infrastructure?
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What is a major goal of computer networks?
What is a major goal of computer networks?
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Which type of network is often used within a corporate building for resource sharing?
Which type of network is often used within a corporate building for resource sharing?
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What is typically NOT a function of a Metropolitan Area Network (MAN)?
What is typically NOT a function of a Metropolitan Area Network (MAN)?
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What distinguishes Personal Area Networks (PAN) from other types of networks?
What distinguishes Personal Area Networks (PAN) from other types of networks?
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What is a disadvantage of using a hub in a network?
What is a disadvantage of using a hub in a network?
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Which device is responsible for initiating a direct connection from the sender to the destination?
Which device is responsible for initiating a direct connection from the sender to the destination?
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What type of network connection does a cable modem create?
What type of network connection does a cable modem create?
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What is the primary role of a firewall in a network?
What is the primary role of a firewall in a network?
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What is a key advantage of using a wireless network?
What is a key advantage of using a wireless network?
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What function does the transport layer serve in networking?
What function does the transport layer serve in networking?
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Which of the following is NOT a task of servers in a network?
Which of the following is NOT a task of servers in a network?
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What is an essential limitation of network cables?
What is an essential limitation of network cables?
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What is the primary function of a hub in a network?
What is the primary function of a hub in a network?
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Which topology is characterized by a direct connection between all networking devices?
Which topology is characterized by a direct connection between all networking devices?
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What is a disadvantage of the Token Ring topology?
What is a disadvantage of the Token Ring topology?
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Which networking protocol is most commonly used to replace Token Ring topology?
Which networking protocol is most commonly used to replace Token Ring topology?
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In the context of LANs, what does 'topology' refer to?
In the context of LANs, what does 'topology' refer to?
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Which description accurately represents a mesh topology?
Which description accurately represents a mesh topology?
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What topology involves computers sharing a single transmission medium?
What topology involves computers sharing a single transmission medium?
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How does using a switch compare to using a hub in a star network?
How does using a switch compare to using a hub in a star network?
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Study Notes
Computer Networking Key Concepts
- Computer networking links computers for shared resources, enabling web browsing, email, file sharing, and more.
- Organizations use networks for word processing, scientific computation, and control processing.
- Networks are categorized by geographic scope.
Network Categories
- Personal Area Network (PAN): Smallest network, connecting personal devices (e.g., earphones, computers).
- Local Area Network (LAN): Connects devices within a limited area (e.g., building, home).
- Campus Area Network (CAN): Connects multiple buildings in a campus environment.
- Metropolitan Area Network (MAN): Connects buildings across a city.
- Wide Area Network (WAN): Largest network, spanning cities, provinces, and countries; can consist of LANs and MANs.
Network Architecture
- A diagram illustrating network device structure and its services to meet connectivity needs.
- Common types of network architecture:
- Access networks: Connect users and devices within a campus or branch.
- Data center networks: Connect multiple servers for data and application accessibility.
- Wide Area Networks (WANs): Connect users to programs and services (e.g., hospital employees to health applications).
The Open Systems Interconnection (OSI) Model
- A reference model for communication systems to allow interlinking of different network types.
- Developed by the International Organization for Standardization (ISO).
- Consists of seven layers:
- Physical Layer: Electrical and mechanical connections.
- Data Link Layer: Error recovery, flow control, and sequencing.
- Network Layer: Network controller, message routing.
- Transport Layer: End-to-end message delivery and integrity.
- Session Layer: Managing, starting, and ending connections.
- Presentation Layer: Message conversion and encryption.
- Application Layer: Interaction with application programs.
Network Types and Devices
- Wired Networks: Use cabling and connectors for connections.
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Wireless Networks: Use radio signals for connections.
- Advantages: Faster data transfer speed, user mobility, simple installation, and inexpensive setup.
- Disadvantages: Specialized tools, labor-intensive installation, security issues, and slower data transfer.
- Network devices: Includes Ethernet cables, hubs, switches, cable modems, servers, and firewalls.
- LAN Ethernet Cable: Connects within a local area network.
- Hub: Connects networking devices but broadcasts data to all connected devices.
- Switch: More sophisticated, connects directly from sender to receiver.
- Cable Modem: Creates a broadband connection.
- Server: Provides resources, data, services, and programs to other devices.
- Firewall: Security device, monitors and controls incoming/outgoing network traffic.
- Wireless Access Point: Connects wireless devices to wired networks.
- Wireless Router: Combines router, switch, and wireless access point functions.
Network Topologies
- Point-to-Point: Simplest, connecting two devices directly.
- Token Ring: Deterministic, access to transmission using fixed intervals.
- Bus: Computers share the transmission media.
- Star: Devices connect to a central switch/hub. Common network topology.
- Mesh: Devices are directly connected, multiple paths exist. Fully Meshed, Partially Meshed.
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Description
This quiz covers key concepts in computer networking, including various categories of networks such as PAN, LAN, CAN, MAN, and WAN. It also explores network architecture and its importance in enabling connectivity and resource sharing among devices. Test your understanding of fundamental networking principles.
