OSI Layers - ICT Module 4

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Questions and Answers

It is the user interface that internet users interact with to send or receive data through email, online games, peer to peer file transfer, and other applications.

  • Data link layer
  • Presentation layer
  • Application layer (correct)
  • Network layer

It establishes a “mechanism for opening, closing and managing a session between end-user application processes and responses”.

  • Application layer
  • Data link layer
  • Session layer (correct)
  • Presentation layer

One device transmits at a time until all the information has been completely sent.

  • half and full duplex mode
  • single mode
  • full-duplex mode
  • half duplex mode (correct)

It seeks for the best-known path to route information to reach its destination similar to searching for an address on a GPS.

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

When the device can transmit and receive information simultaneously, such as in phone conversation.

<p>full-duplex mode (D)</p> Signup and view all the answers

NOT only defines how data is sent, but also provides validation and firewall security.

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

It is a layer that ensures that a transmission occurs without any errors.

<p>Data link layer (B)</p> Signup and view all the answers

It is also known as the physical address of a computer 48-bit address burnt onto the network interface card (NIC)

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

It consists of the physical components in a Local Area Network (LAN) such as networking hardware and Ethernet cables.

<p>Data link layer (A)</p> Signup and view all the answers

Is an abstract description for layered communications and computer network protocol design.

<p>Open System Interconnection (C)</p> Signup and view all the answers

There are (7) seven layers of OSI model.

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

OSI model utilizes the TCP/IP protocol.

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

Network layer defines how data is sent, but also provides validation and firewall security.

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

Transport layer seeks for the best-known path to route information to reach its destination similar to searching for an address on a GPS.

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

Physical layer ensures that a transmission occurs without any errors.

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

It is a surface mounted box used in a commercial and industrial building to cleanly attach network cables.

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

This ensures that a transmission occurs without any errors.

<p>Data link layer (C)</p> Signup and view all the answers

This layer translates the commands received from the application layer into universal, well-known networking formats.

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

This layer establishes a “mechanism for opening, closing and managing a session between end-user application processes and responses” in order for a packet to reach its destination.

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

This OSI layer defines how data is sent, but also provides validation and firewall security.

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

This type of connector is designed to make secure and reliable input/output connections.

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

It will transmit at a time until all the information has been completely sent.

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

Device that takes turns transmitting such as occurs when speaking through walkie talkies.

<p>half duplex mode (B)</p> Signup and view all the answers

This is used when the device can transmit and receive information simultaneously.

<p>full duplex (D)</p> Signup and view all the answers

It is an example of common protocols associated with the application layer.

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

These virtual IP addressing help packets navigate a network to reach their destination using IPv4 or IPv6 protocols.

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

Flashcards

Application Layer

The user interface for sending/receiving data (e.g., email, games).

Presentation Layer

Translates app commands into network formats (e.g., encryption).

Session Layer

Manages sessions between applications (like phone calls).

Transport Layer

Sends data reliably, includes validation and security.

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Network Layer

Routes data to destinations (like GPS).

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Data Link Layer

Ensures error-free transmission of data.

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Physical Layer

The physical network hardware (cables, ports).

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OSI Model

A layered network architecture model.

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Modular Box

A surface-mounted box for connecting network cables.

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Modular Jack

A connector for secure cable connections.

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Full Duplex

Data transmission in both directions simultaneously.

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Half Duplex

Data transmission in one direction at a time.

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MAC Address

A unique physical address of a network device(NIC).

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TCP/IP

A suite of communication protocols.

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HTTPS

Secure protocol for web traffic.

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Logical Addressing

Virtual IP addresses for routing.

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T568A/B

Wiring configuration standards for Ethernet cables.

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Study Notes

Technical and Vocational Livelihood Information and Communication Technology Computer Systems Servicing Quarter 2 Module 4: OSI Layers

  • OSI Model (Open Systems Interconnection Model): A layered framework for describing network communication protocols. Consists of seven layers.
  • Application Layer (Layer 7): The user interface for internet activities (email, games, file transfer).
  • Presentation Layer (Layer 6): Translates application layer commands into universal formats. Handles data encryption and conversion. Examples are JPEG, GIF, TIFF, MPEG.
  • Session Layer (Layer 5): Establishes, manages, and terminates sessions between applications.
  • Transport Layer (Layer 4): Defines data transmission, error handling, and security. Uses TCP (Transmission Control Protocol) or UDP (User Datagram Protocol).
  • Network Layer (Layer 3): Determines the best route for data to reach destination. Defines logical addressing (IP addresses).
  • Data Link Layer (Layer 2): Ensures error-free transmission between nodes. Uses Logical Link Control (LLC) and Media Access Control (MAC) to achieve this. Physical addressing is done at this layer.
  • Physical Layer (Layer 1): Handles the physical connection (hardware and cabling). Transmits raw bits.
  • MODULAR JACK (Ethernet): A type of connector designed for secure and reliable connections, often used in many applications.
  • Common Protocols: Hypertext Transfer Protocol (HTTP), HTTPS, Telnet, SSH, File Transfer Protocol (FTP), Trivial File Transfer Protocol (TFTP), Simple Mail Transfer Protocol (SMTP), Post Office Protocol 3 (POP3), Domain Name System (DNS), Network Time Protocol (NTP), Ethernet, Token Ring, Fiber Distributed Data Interface (FDDI), Point-to-Point Protocol (PPP), and many others.

Additional Information

  • Single Mode: A transmission mode where one device transmits at a time until all information is sent.
  • Half Duplex Mode: An alternate transmission method where devices take turns transmitting.
  • Full Duplex Mode: A transmission method where devices can transmit and receive information simultaneously.
  • Logical Addressing: virtual IP addresses.
  • MAC Addresses: Physical addresses that uniquely identify a network interface card.
  • IP Addresses: Logical addresses used to identify devices on a network.
  • Data Encapsulation: Enclosing data in headers for transmission through the network.
  • Fragmentation and Re-assembly: Dividing large packets into smaller pieces for transmission and reassembling them at the destination.

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