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Questions and Answers

What function is primarily associated with the Network Layer within the OSI model?

  • Establishing communication sessions
  • Encryption and decryption of data
  • Transmission of frames without errors
  • Assignment of addresses and packet routing (correct)

Which layer of the OSI model is responsible for end-to-end error control and flow control mechanisms?

  • Data Link Layer
  • Transport Layer (correct)
  • Session Layer
  • Application Layer

Which layer of the OSI model is responsible for the actual hardware specifications used for network communications?

  • Application Layer
  • Network Layer
  • Physical Layer (correct)
  • Presentation Layer

In which OSI layer does data translation and representation occur to ensure the data is understandable at the receiver's end?

<p>Presentation Layer (D)</p> Signup and view all the answers

What aspect of networking is enhanced by the ability to share hardware resources within a network?

<p>Resource allocation efficiency (B)</p> Signup and view all the answers

What is the primary function of a network in the context of connecting computers?

<p>To facilitate communication and resource sharing among connected computers (B)</p> Signup and view all the answers

Which of the following best describes a Local Area Network (LAN)?

<p>A network that connects computers in a limited geographical area like a building (D)</p> Signup and view all the answers

In a typical network setup, what role does the server play?

<p>It stores, processes, and routes data to other computers in the network (C)</p> Signup and view all the answers

What could be a disadvantage of a desk officer visiting representatives to collect information?

<p>It may be time consuming and labor-intensive (C)</p> Signup and view all the answers

What is one benefit of connecting representatives' computers through a network?

<p>It allows for remote access to physical resources like printers (C)</p> Signup and view all the answers

Which of the following is NOT a typical feature of a dedicated server in a network?

<p>Connecting users to the internet directly (B)</p> Signup and view all the answers

If you were to assess the installation cost of a network, which type of network would likely be the least expensive?

<p>Local Area Network (LAN) (C)</p> Signup and view all the answers

What is a primary characteristic of a network protocol?

<p>It establishes rules for data communication and exchange (A)</p> Signup and view all the answers

What does LAN primarily enable among its connected computers?

<p>Resource sharing and information exchange (A)</p> Signup and view all the answers

Which of the following transmission protocols is NOT typically used in LAN?

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

What is a characteristic of a Campus Area Network (CAN)?

<p>Connects multiple local area networks (B)</p> Signup and view all the answers

Which topology features a single central cable to which all network devices are connected?

<p>Bus topology (B)</p> Signup and view all the answers

What is the maximum speed typically supported by a LAN?

<p>100 Mbps (C)</p> Signup and view all the answers

Which type of network is generally larger than a Campus Area Network but smaller than a Metropolitan Area Network?

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

Which of the following is a requirement for the maintenance of MANs and WANs?

<p>On-site administrator and support staff (D)</p> Signup and view all the answers

What type of LAN specifically utilizes wireless technology for its operation?

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

Which of the following describes Ring topology?

<p>Devices are connected in a closed loop with no ends (C)</p> Signup and view all the answers

What type of network serves to connect numerous LANs over large geographical distances?

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

What is the primary function of the terminator in a bus topology?

<p>To prevent signal reflection (C)</p> Signup and view all the answers

In a bus topology, what happens if the central cable is damaged?

<p>The entire network becomes inoperable (A)</p> Signup and view all the answers

Which cable type is most commonly associated with bus topology?

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

How does a device in a bus topology determine if it should accept the data signal?

<p>By comparing the destination address with its own (B)</p> Signup and view all the answers

What limitation does the addition of more computers create in bus topology?

<p>Slower network performance (C)</p> Signup and view all the answers

What is the role of a hub in a bus topology?

<p>To manage data flow amongst devices (B)</p> Signup and view all the answers

Which of the following is NOT an advantage of bus topology?

<p>Highly fault-tolerant (A)</p> Signup and view all the answers

What method does a ring topology use to control access to the network?

<p>Token passing (B)</p> Signup and view all the answers

How do devices connect in a ring topology?

<p>In a circular form with receivers and transmitters (D)</p> Signup and view all the answers

What is the consequence of a device being unable to transmit data when using bus topology?

<p>It can still receive data from other devices (C)</p> Signup and view all the answers

Which of the following protocols is NOT typically associated with ring topology?

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

What is a significant disadvantage of star topology?

<p>Failure of the hub or switch brings down the entire network. (B)</p> Signup and view all the answers

Which advantage is unique to ring topology compared to other topologies?

<p>Equal access to the transmission medium. (D)</p> Signup and view all the answers

When considering the OSI model, which of the following statements is true?

<p>It outlines seven distinct layers with specific functions. (D)</p> Signup and view all the answers

What can be a limitation of adding devices to a star topology?

<p>It can increase overall latency in the network. (A)</p> Signup and view all the answers

What is a distinct vulnerability of ring topology?

<p>Removal of one device affects the entire network. (A)</p> Signup and view all the answers

Which complex topologies are mentioned in the context of LAN networking?

<p>Tree and mesh topologies. (C)</p> Signup and view all the answers

In terms of performance, what is a potential effect of adding additional devices in a star topology?

<p>Performance may decrease with more traffic and devices. (D)</p> Signup and view all the answers

Which of the following describes a key feature of the protocols used in star topology?

<p>They involve a controlled flow of data via a central hub. (C)</p> Signup and view all the answers

What aspect of network maintenance is simplified in star topology?

<p>Identification of device malfunctions. (C)</p> Signup and view all the answers

Flashcards

What is a network?

A group of interconnected computers that can communicate, share resources, and improve productivity.

What is a server?

A computer in a network that provides services to other computers (clients) in the network.

What is a Local Area Network (LAN)?

A type of network that connects computers in a small geographical area, such as a room, building, or campus.

What are clients in a network?

Computers that access services and resources provided by a server in a network.

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What are shared resources in a network?

Shared resources in a network, like printers and copiers, can be used by multiple computers connected to the network.

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What is a wired network?

A way of connecting computers using physical cables, like Ethernet cables.

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What is a wireless network?

A way of connecting computers using radio waves, like Wi-Fi.

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What are protocols in a network?

Rules and standards that computers use to communicate and exchange information in a network.

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Physical Layer

This layer manages the physical connection between devices, handling details like bit encoding, transmission speed, and network topology.

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Data Link Layer

Responsible for reliable data transfer between two directly connected devices. It takes packets from the network layer and creates frames for error-free transmission.

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Network Layer

This layer manages network addressing and routing, making sure data packets reach their intended destination. It uses routing protocols to find the best path for data.

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Transport Layer

It ensures reliable data delivery between applications. Handles packet sequencing, error control, and flow control.

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Session Layer

This layer establishes and maintains communication sessions between applications. Handles authentication, synchronization, and session management.

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Bus Topology

A network topology where all devices are linked in a single, continuous cable called a bus.

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Node

The point where a device connects to the central communication channel (bus) in a bus topology.

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Data Signal

A signal carrying the destination address of a message in a bus topology. Each computer checks the destination address and copies the data if it matches.

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Terminator

A device used in bus topology to absorb the data signal at the end of the cable, preventing signal reflection.

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Ring Topology

A network configuration where devices are connected in a closed loop, with data passing along the ring.

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Token Passing

A method used in ring topology where each device gets a turn to transmit data using a token that passes around the loop.

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Easy to implement

The benefit of a network topology being easy to set up and expand.

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Single point of failure

The drawback of a bus topology where damage to the main cable disrupts the entire network.

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Network slows down

The drawback of bus topology where network performance suffers when many devices are connected.

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Direct communication

The benefit of a ring topology where all devices can communicate directly with each other.

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Campus Area Network (CAN)

A network that connects multiple local area networks (LANs) within a specific geographical area, like a university campus.

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Metropolitan Area Network (MAN)

A high-speed network connecting numerous LANs in a large urban area, providing internet access.

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Wide Area Network (WAN)

A network that connects multiple LANs over very large distances, often across countries, using the internet or phone lines.

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Star Topology

A network topology where all devices are connected to a central hub, forming a star shape.

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Local Area Network (LAN)

A private network used to share resources and information among computers in a small geographical area, usually within a building or a small group of buildings.

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Wireless Local Area Network (WLAN)

A type of Local Area Network (LAN) that uses wireless technology to connect devices.

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Network Topology

The arrangement and connection of devices in a network, defining how data flows between them.

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Transmission Protocols

A set of rules and procedures defining how data is transmitted and received in a LAN, ensuring smooth communication.

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FDDI (Fiber Distributed Data Interface)

A standard for high-speed fiber optic communication over a ring network, offering increased speed and reliability.

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Hub or Switch in Star Topology

The process of transmitting data through a central hub in a star topology, making it a central point for data flow.

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OSI (Open System Interconnection) Model

A model created by the International Standards Organization (ISO) in 1984 to establish a common framework for network communication.

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Extensibility

The ability to add or remove devices without disrupting the overall functionality of the network.

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Troubleshooting

The process of identifying and resolving network issues.

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Resilience

The degree of reliability and stability of a network against failures or disruptions.

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High Traffic and Data Transmission Requirement

The ability of a network to handle high volumes of data transmission effectively without performance degradation.

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Study Notes

KWASU CODeL Delegation Activities Monitoring

  • Desk officer needs to monitor various representatives across the country
  • Representatives track inquiries, program interest, and student registration numbers
  • Visiting each representative is time-consuming and taxing
  • A network solution is a more efficient alternative, connecting representatives' computers
  • This allows information access at the officer's desk

Network Definition

  • A network is a group of interconnected computers (wired or wireless) enabling communication and resource sharing
  • Dedicated servers manage data/information, serving other computers (clients)
  • A network structure is illustrated with computers (A, B, C) connected to a central server, allowing resource sharing such as printers.

Network Types

  • Networks are classified according to their geographical coverage and associated costs
    • LAN (Local Area Network): Connects computers in a small area (room, building, or campus). Computers in a LAN share resources like printers.
    • CAN (Campus Area Network): Larger than LANs but smaller than MANs, connecting multiple LANs like different schools in a university
    • MAN (Metropolitan Area Network): Connects multiple LANs in a large, populated area for high-speed communication and internet access.
    • WAN (Wide Area Network): Links multiple LANs across vast areas (cities, countries). This network often uses the internet or public telephone systems.

Network Topologies

  • Network topology, defines the structure of how computers are linked together. LANs commonly use:
    • Bus Topology: Data travels along a central cable (bus). Devices access data from the bus
    • Star Topology: Each device has a direct connection to a central hub or switch. Information travels through the central point.
    • Ring Topology: Devices are connected in a closed loop, data passes in a single direction

Bus Topology - Advantages and Disadvantages

  • Advantages
    • Easy to implement
    • Scalable (easy to add new devices)
    • Relatively inexpensive
  • Disadvantages
    • Network failure if the cable is damaged
    • Slows down with more connected devices
    • Limited number and length of connected devices
    • Single point of failure

Star Topology - Advantages and Disadvantages

  • Advantages
    • Failure of one device does not impact the entire network
    • Easy to add or remove devices
    • Relatively easy to maintain or troubleshoot
  • Disadvantages
    • More expensive than bus topology
    • Hub or switch failure impacts the whole network

Ring Topology - Advantages and Disadvantages

  • Advantages
    • All computers have equal access in the ring
  • Disadvantages
    • Adding/removing devices impacts the entire network
    • Failure in one node disrupts the entire network
    • Limited network size

Internet Definition

  • The internet is a network of networks, governed by common protocols (IP).
  • It provides access to information, files, voice, and videos globally.
  • It allows accessing learning materials even geographically

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