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Questions and Answers
What is the main function of N-Tier architectures?
Which architecture is most commonly associated with N-Tier systems?
What defines a wireless network?
What is a notable disadvantage of wireless networks?
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What is one of the primary advantages of mobile networks?
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What type of technology do portable computers use to connect to networks?
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What are the two main categories of wireless technologies?
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What key feature does a mobile network operate on?
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What are the main components of a data communication system?
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Which type of media provides a physical path for signals to be transmitted?
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What term describes the loss of power in a signal as it travels?
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Data transmission is categorized into two types. Which of the following is NOT one of these types?
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Which of the following correctly defines broadband?
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What is defined as the rules governing how data communicates?
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Which device format is considered an example of an input/output device?
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What distinguishes narrowband transmission from broadband?
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What is a primary function of a data communication system?
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Which of the following is NOT a major component of a data communication system?
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Which of the following describes an important networking concept?
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What do the terms Wi-Fi, WiMAX, and Bluetooth represent?
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What is the main importance of wireless security?
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Which of the following best summarizes the concept of convergence in networking?
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Which processing configuration is commonly used in distributed systems?
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What aspect of data communication systems supports an organization's efficiency?
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What is the primary function of a Network Interface Card?
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Which type of network is typically used within a single building?
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What communication protocol is primarily used in Local Area Networks?
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Which statement accurately describes a Wide Area Network?
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Which of the following most accurately describes a Metropolitan Area Network?
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How is the speed of a Wide Area Network primarily determined?
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What is the primary characteristic of a Local Area Network?
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Which organization developed the standards for Metropolitan Area Networks?
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What characterizes a ring topology in a network?
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Which topology is designed to be highly reliable but is also costly to maintain?
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In which network topology do failures at the bottom level nodes not significantly impact overall network performance?
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What is a key feature of bus topology regarding its cable structure?
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Which approach to network topology involves arranging multiple computers with varying processing strengths?
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Study Notes
N-Tier Architectures
- N-Tier Architecture divides client and server workloads.
- Middle-tier servers house application logic instead of client and server.
- The most common N-Tier architecture has three tiers.
Wireless and Mobile Networks
- Wireless networks use wireless communication technology instead of wired technology.
- Mobile networks operate using radio frequencies.
Wireless and Mobile Networks Advantages and Disadvantages
-
Advantages:
- Mobility
- Flexibility
- Ease of installation
- Low cost
- Access when no infrastructure exists
-
Disadvantages:
- Limited throughput
- Limited range
- In-building penetration problems
- Vulnerability to frequency noise
- Security
Wireless Technologies
- Portable computers use small antennas to communicate with radio towers.
- There are two primary groups of Wireless technologies:
- Wireless LANs (WLANs)
- Wireless WANs (WWANs)
- Wireless technologies rely on the Radio Frequency (RF) spectrum.
Major Components of Data Communication Systems
- Data communication systems have three components:
- Sender and receiver devices
- Modems or routers
- A communication channel
- Bandwidth measures the data transfer rate in one second.
- Attenuation is the signal power loss during transmission.
Major Components of Data Communication Systems: Communication Media
- Communication media connect sender and receiver devices.
- Media can be conducted or radiated:
- Conducted media transmits signals via a physical path (e.g., cable).
- Radiated media use antennas to transmit data through air or water.
Major Components of Data Communication Systems: Data Transmission
- Data transmission is divided into two types:
- Broadband: multiple pieces of data sent simultaneously
- Narrowband: voice-grade transmission with limited information transfer
- Protocols are rules that govern data communication.
Major Components of Data Communication Systems: Sender and Receiver Devices
- Sender and receiver devices can have various formats:
- Input/output device (“thin client”)
- Smart terminal
- Personal computer
- Netbook computer
- Supercomputer
- Smartphone
Module Objectives
- Learn the major applications of data communication systems.
- Understand the three major components of data communication systems.
- Describe the three major types of processing configurations.
- Explain the three types of networks.
- Define the five main network topologies.
- Understand networking concepts like protocols, TCP/IP, routing, routers, and the client/server model.
- Explore wireless and mobile technologies and networks in business settings.
- Describe networking trends including Wi-Fi, WiMAX, and Bluetooth.
- Discuss the importance of wireless security techniques.
- Understand the concept of convergence and its applications.
Data Communication System
- It's the electronic transfer of data between locations.
- Critical for organizations.
- Used by virtual organizations and e-collaboration.
- Supports organizational efficiency and effectiveness.
Seven-Layer OSI Model
- The Open Systems Interconnection (OSI) model has seven layers for network communication.
- Each layer specifies functions for data transmission.
Types of Networks
- Three major types of networks:
- Local Area Networks (LAN)
- Wide Area Networks (WAN)
- Metropolitan Area Networks (MAN)
- Network Interface Cards (NIC) enable computer communication on networks.
Types of Networks: LAN
- Connects workstations and peripherals in close proximity.
- Integrates services in a limited geographical area (e.g., a building).
- Uses Ethernet as the standard communication protocol.
- Ethernet cables connect computers, switche, and routers.
Types of Networks: WAN
- Can span cities, states or countries.
- Speed depends on interconnections.
- Uses various communication media.
Types of Networks: MAN
- Handles data communication for multiple organizations in a city.
- Developed by IEEE for public, independent, high-speed networks.
Comparing LANs, WANs and MANs
- LANs interconnect devices in a small area, WANs connect over large distances, and MANs serve an entire city.
Network Topologies
- Represents a network's physical layout.
- Common network topologies:
- Star
- Ring
- Bus
- Hierarchical
- Mesh
Network Topologies: Star
- Has a central computer (host) connected to nodes.
- The host computer provides main processing power.
Network Topologies: Ring
- No host computer is required.
- Each computer manages its own connectivity.
- Arranged in a circle.
- Transmission is unidirectional.
Network Topologies: Bus
- Connects nodes along a network segment.
- Cable ends are not connected.
- Terminators absorb signals at cable ends.
Network Topologies: Hierarchical
- Combines computers with different processing strengths.
- Lower-level node failure doesn't affect network performance.
- Middle and top nodes are crucial for network operations.
Network Topologies: Mesh
- Every node is connected to every other node.
- Highly reliable.
- Costly and difficult to maintain.
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Description
Explore the fundamental concepts of N-Tier Architectures and Wireless and Mobile Networks. This quiz covers advantages and disadvantages of wireless technologies, as well as distinctions between Wireless LANs and WANs. Perfect for students looking to understand modern networking paradigms.
