Computer Network Technologies - Week 1 Assessment
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Questions and Answers

What layer of the OSI model is responsible for transforming data between network and application formats?

  • Application Layer
  • Presentation Layer (correct)
  • Session Layer
  • Transport Layer

The Application Layer facilitates data encryption and compression.

False (B)

What protocol facilitates file transfers between systems?

FTP

The ______ receives an email, ensuring it is sent to the correct server.

<p>Application Layer</p> Signup and view all the answers

Which of the following is NOT a function of the Presentation Layer?

<p>File Transfer Protocol (D)</p> Signup and view all the answers

Match the following protocols with their functions:

<p>HTTP/HTTPS = Allows transferring files between systems SMTP = Enables sending emails DNS = Resolves domain names into IP addresses FTP = Facilitates web browsing</p> Signup and view all the answers

Data Compression is used to increase the size of files for transmission.

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

Which layer is primarily responsible for delivering data to the user in a usable form?

<p>Application Layer</p> Signup and view all the answers

What is the main function of the Session Layer?

<p>Manages sessions between network devices (C)</p> Signup and view all the answers

The Transport Layer handles session management for communication between systems.

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

What protocol is mentioned as being used for communication in local area networks?

<p>NetBIOS</p> Signup and view all the answers

The Transport Layer uses __________ to manage lost or corrupted packets.

<p>Error Detection &amp; Correction</p> Signup and view all the answers

Which function of the Session Layer allows for interrupted sessions to be restarted?

<p>Session Management (D)</p> Signup and view all the answers

What role does the Transport Layer play when downloading large files?

<p>It segments data into smaller packets and ensures correct reassembly.</p> Signup and view all the answers

Match the following functions to their corresponding layer:

<p>Session Establishment = Session Layer Error Detection &amp; Correction = Transport Layer Flow Control = Transport Layer Session Termination = Session Layer</p> Signup and view all the answers

Multiplayer online games utilize the Session Layer to keep players' connections __________.

<p>stable</p> Signup and view all the answers

Which of the following best describes how networks have impacted remote work?

<p>They enable telecommuting and flexible working arrangements. (A)</p> Signup and view all the answers

Instant messaging allows for asynchronous communication.

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

What application has become essential for virtual meetings?

<p>Zoom</p> Signup and view all the answers

Networks have democratized access to ______, enabling users to communicate ideas and news widely.

<p>information</p> Signup and view all the answers

Which of the following is NOT an example of a collaboration tool?

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

Match the following aspects of communication with their examples:

<p>Instant Messaging = WhatsApp Video Conferencing = Zoom Social Media = Twitter Access to Information = Wikipedia</p> Signup and view all the answers

Networks allow businesses to hire talent globally.

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

Name one benefit of cloud computing.

<p>Access to data from any device</p> Signup and view all the answers

What is the primary function of the Network Layer in the OSI model?

<p>Routing data packets through the network (B)</p> Signup and view all the answers

The Data Link Layer only manages communication between devices on different networks.

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

Name one protocol associated with the Network Layer.

<p>IP</p> Signup and view all the answers

The Data Link Layer uses framing to encapsulate _____ into structured frames.

<p>raw bits</p> Signup and view all the answers

What best describes 'Error Detection' in the Data Link Layer?

<p>Identifies transmission errors (D)</p> Signup and view all the answers

Match each OSI Layer to its primary function:

<p>Network Layer = Routing and addressing packets Data Link Layer = Node-to-node communication management Physical Layer = Transmission of raw bits Transport Layer = Reliable delivery of data</p> Signup and view all the answers

Traffic Management refers to the process of scaling the bandwidth available across multiple devices.

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

What does the Logical Link Control (LLC) Layer primarily manage?

<p>Error control and flow control</p> Signup and view all the answers

What is a key function of a SOHO router?

<p>To manage traffic between the Local Area Network and Wide Area Network (D)</p> Signup and view all the answers

A MAC address is unique for each device connected to a network.

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

What do wired devices in a SOHO network typically connect through?

<p>Ethernet cables</p> Signup and view all the answers

The component that connects wireless devices to the network is called a ______.

<p>Wireless Access Point (WAP)</p> Signup and view all the answers

Match the following components with their primary role in a SOHO network:

<p>SOHO Router = Manages traffic between LAN and WAN SOHO Switch = Forwards data within the local network Wireless Access Point = Connects wireless devices to the network Wired Devices = Includes PCs and printers connected via Ethernet</p> Signup and view all the answers

Which layer of the OSI model is responsible for packaging bits into frames?

<p>Data Link Layer (C)</p> Signup and view all the answers

Wireless devices offer more stability than wired devices in a network.

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

What is the role of a SOHO switch in a network?

<p>Extends the wired network and forwards data between connected devices.</p> Signup and view all the answers

What is a primary difference between a SOHO router and an enterprise-grade router?

<p>SOHO routers typically offer less scalability and fewer features compared to enterprise routers. (B)</p> Signup and view all the answers

A SOHO router provides enhanced security for a small office/home office network.

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

What challenges may arise when managing a SOHO network with an increasing number of connected devices?

<p>Network congestion and reduced performance.</p> Signup and view all the answers

A SOHO router plays a crucial role in __________ a small office/home office network.

<p>securing</p> Signup and view all the answers

Match each type of cable with its characteristics:

<p>Twisted Pair = Transmits electrical signals over pairs of wires Coaxial = Contains a central conductor and insulating layer Fiber Optic = Uses light to transmit data and offers higher bandwidth Ethernet = Defines performance standards for wired networks</p> Signup and view all the answers

What equipment is essential for setting up a SOHO network for multiple workstations?

<p>A router, switch, workstations, and a printer (A)</p> Signup and view all the answers

Electromagnetic radiation is not used in network data transmission.

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

What is the primary function of Media Access Control (MAC) in network communication?

<p>To ensure nodes communicate without interference on shared media.</p> Signup and view all the answers

Flashcards

Data Communications

Transferring data using analog or digital signals.

Backbone

Fast network link connecting segments, devices (routers, switches, servers).

Link

Active connection between devices over media.

Instant Messaging

Real-time communication using networks.

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Video Conferencing

Face-to-face meetings over networks, regardless of location.

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Remote Work

Working from anywhere using network support.

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Collaboration Tools

Network-based applications for team work and project management.

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Cloud Computing

Networked services allowing data storage and access.

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Session Layer Function

Establishes, manages, and terminates sessions between network devices.

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Session Establishment

Sets up communication connections between devices.

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Session Management

Manages session duration and data flow during communication.

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Session Termination

Ends the session when communication is finished.

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Transport Layer Function

Ensures data arrives error-free, in sequence, and without duplication. It segments and reassembles data.

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Error Detection & Correction

Identifies lost/corrupted packets and requests retransmission.

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Flow Control

Manages the rate of data transmission to prevent congestion.

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Segmentation

Divides large data streams into smaller packets for transmission.

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Application Layer Functionality

Acts as the interface between the application and the user, handling data exchange via protocols (e.g., FTP, HTTP).

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Application Layer Protocols

Protocols like FTP, HTTP/HTTPS, SMTP, and DNS facilitate data exchange for applications.

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Presentation Layer Function

Transforms data formats between the application and network, handling encryption, conversion, and compression.

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Presentation Layer Tasks

Encrypts sensitive data (e.g., HTTPS), compresses data sizes, and converts character sets/data formats.

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Data Encryption (Presentation Layer)

The presentation layer secures information like credit card details during online transactions.

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Data Compression (Presentation Layer)

Makes files smaller for faster network transmission.

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Character Set Conversion (Presentation Layer)

Converts different character representations efficiently(e.g. ASCII to Unicode).

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Data Conversion (Presentation Layer)

Translates between different data formats for compatibility.

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Network Layer

The OSI layer responsible for routing data across networks, handling logical addressing, and managing network traffic.

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IP (Internet Protocol)

A protocol used by the Network Layer to assign unique logical addresses to devices on a network.

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ICMP (Internet Control Message Protocol)

A protocol used by the Network Layer to send error messages and diagnostic information between devices.

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Data Link Layer

The OSI layer that manages direct communication between devices, providing framing, error detection, and flow control.

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Framing

The process of structuring raw bits into organized frames for transmission over the network.

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Error Detection

The process of identifying transmission errors in data frames.

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LLC (Logical Link Control) Layer

A sub-layer of the Data Link Layer that handles error control and flow control.

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SOHO Router Function

Manages traffic between the Local Area Network (LAN) and Wide Area Network (WAN) for home or small offices.

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SOHO Switch Function

Connects wired devices like PCs, printers, and phones within a local network, allowing them to communicate.

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Wireless Access Point (WAP)

Allows wireless devices like laptops and phones to connect to the network without cables.

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MAC Address

A unique identifier for each device on a network, used by switches and access points to direct data to the correct device.

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What does a SOHO network connect?

A SOHO network connects internal devices (like computers and printers) to the external internet.

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What is the role of a SOHO router in a network?

The SOHO router manages the flow of data between the internal network and the external internet.

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What is a SOHO switch used for?

A SOHO switch connects wired devices like PCs, printers, and IP phones, connecting them to the local network.

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How does a Wireless Access Point (WAP) work ?

A WAP allows wireless devices like laptops and smartphones to connect to the network without using cables.

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SOHO vs. Enterprise Router

SOHO routers are simpler, less powerful, and focus on basic features, while enterprise-grade routers are designed for larger, complex networks with advanced security and management capabilities.

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SOHO Router Security

A SOHO router secures a network by acting as a firewall, blocking unauthorized access and protecting devices from external threats.

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SOHO Network Challenges

As the number of devices on a SOHO network increases, managing bandwidth, security, and performance becomes more complex.

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Ethernet Standards

Ethernet standards define network cable performance, ensuring proper bandwidth and data transmission over various media types.

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Media Access Control (MAC)

MAC ensures network devices can communicate without interfering with each other on the same network segment.

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Collision Domains

Collision domains occur when multiple devices try to communicate simultaneously on shared network media, leading to data corruption.

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Copper Cable

Copper cable transmits electrical signals through low voltage circuits. It comes in two main types: Twisted Pair and Coaxial (Coax).

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Study Notes

Computer Network Technologies - Week 1

  • This course is ITCTA1-44
  • Eduvos (Pty) Ltd is a registered higher education institution
  • Registration Certificate number: 2001/HE07/008

Formative Assessment - Project

  • There is one individual project
  • The project is based on applying theory to a practical case study
  • The project counts for 40% of the final mark
  • Students need to spend approximately 20-30 hours on the project to achieve a 50% (pass)
  • Projects are due on or before the due date (as per arrangement or stipulated)
  • 5% mark deduction for each day late, up to a maximum of three days
  • Projects more than three days late will receive a zero.

Formative Assessment - Online Test

  • Students must complete an online test on MyLMS within a given timeframe
  • The online test accounts for 10% of the final mark
  • A doctor's note is required if an assessment is missed due to illness, and should be submitted within 3 calendar days.
  • A deferred assessment may be possible, but requires following specific procedures and completing the appropriate application form (on myLMS).
  • A non-refundable fee is required for each missed assessment application.

Summative Assessment (Online Invigilated)

  • The pass mark for a summative assessment is 50%
  • A sub-minimum mark of 40% or higher is required for the summative assessment.
  • A final average of 50% or higher is required for the entire module.
  • A schedule of summative assessment dates will be released to students on myLMS before Week 5 of the block, on the MyDocuments page.

Details of assessments

  • A breakdown of Formative and Summative assessments, methods, weighting, lecture week, submission week, and duration are included in a table format.

Class Groups and Class Representative

  • Select class representatives will be nominated
  • Class representatives will be assigned to student groups (4-5 students per group)
  • Presentations and discussions will be part of the group activity

Week 0: Let's Get Ready

  • By the end of Week 0, students should understand networking principles
  • Assessment Criteria: Compare the types of networks available.

Lesson 1: Introduction to Computer Networks

  • Computer Network: A collection of interconnected devices sharing resources and information.
    • Includes computers, servers, printers, etc.
    • Linked via wired or wireless media.
  • Features of a computer network include sharing resources, high communication speed, scalability, integration, security, and cost-effectiveness.

Types of Computer Networks

  • Networks are classified geographically:
    • LAN: Local Area Network (within a small area)
    • PAN: Personal Area Network (within an individual)
    • MAN: Metropolitan Area Network (larger area than LAN, but smaller than WAN)
    • WAN: Wide Area Network (large geographical area)

Lesson 1: How Does a Computer Network Work?

  • Basic Components: Devices for communication (modems, routers) and terminals (computers)
  • Links: Wires, cables, or wireless connections between nodes.

Lesson 1: Computer Networks Today

  • Essential for human interaction: vital for personal and professional communication, transcending geographical limitations.
  • Impact on communication: revolutionized work, learning, play, and communication by facilitating online experiences and enabling real-time sharing of information and resources.
  • Global Connectivity: national borders/distances no longer stand in the way of connecting people globally (thanks to IoT and social media).
  • Modern Applications: Email, social media, online gaming, and cloud services depend on networks. Businesses heavily use networks for operations, customer service, and data management.

Lesson 2: Comparing OSI Model Network Functions

  • OSI Model: A conceptual model that characterizes and standardizes the communication functions of a computer network.
  • Network Structure: Devices (Nodes) are linked by transmission mediums that share protocols.
  • Data Encapsulation and Decapsulation: Data is packaged and the protocols handle transmission, wrapping data.
  • OSI Model Layers:
    • Application
    • Presentation
    • Session
    • Transport
    • Network
    • Data Link
    • Physical

Lesson 2: Open Systems Interconnection Model

  • Application Layer: an interface between applications and end users, manages protocols that deliver data in a usable format, handles data exchange (email, etc.)
  • Presentation Layer: formats data for applications (e.g., encryption), manages translation (ASCII to Unicode), and compression.
  • Session Layer: manages and terminates communication sessions between applications.
  • Transport Layer: responsible for reliable data transmission using protocols like TCP/UDP.
  • Network Layer: moves data between networks using logical IP addresses for identification.
  • Data Link Layer: packages bits into frames and manages MAC addresses (identifiers).
  • Physical Layer: handles the transmission of raw bit streams.

Practical Activity

  • Focuses on roles played by devices and how data travels through OSI layers.
  • Discussion of encapsulation/decapsulation activities throughout all OSI layers.

Lesson 2: Configure SOHO Networks

  • SOHO Network: a small office or home office network that connects multiple devices. Key components include a router, switch, and modem.
  • SOHO Router functions as a gateway between the network and internet, managing data flow between devices.
  • Benefits of SOHO network include increased productivity, cost-effectiveness, and easier device management. Features include easy sharing of resources (printers, files) and manageable device monitoring, troubleshooting, and security settings by administrators.
  • Wired and wireless device connections: How SOHO routers work with both wired and wireless devices.

Lesson 3: Ethernet Standards

  • Network Data Transmission: Networks using electromagnetic radiation for signaling (electric, infrared, or radio waves)
  • Ethernet Standards: Determine network cabling performance to meet bandwidth demands
  • Media Access Control (MAC) & Collision Domains: Nodes communicating without interference (issues like collisions).
  • Different Cable Types: Copper (twisted pair, coaxial) and fiber optic. Considerations for choosing the best cable type based on required bandwidth and distance.

Activity

  • Focuses on how different networking standards (protocols) work together via bandwidth requirements, data transmission via Ethernet or Fiber Optics cable, or network management/problem analysis.

Practical Activity: Setting up a SOHO Network

  • Scenario: set up a small network with seven workstations and a printer.
  • Hardware requirements:
    • Router
    • Switch
    • Workstations
    • Network Printer

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Computer Network Technologies Week 1 PDF

Description

This quiz covers the formative assessment details for the Computer Network Technologies course in the first week. It includes project guidelines, online test procedures, and grading policies, providing essential information for successfully navigating the course requirements.

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