CCNA Exam 640-801: Networking Devices and Symbols

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Questions and Answers

Which classification includes computers, printers, scanners, and other devices that provide services directly to the user?

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What is a network interface card (NIC) also called?

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What do switches add to data transfer management?

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Which device connects a group of Hosts?

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What is the primary function of a router?

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What did the creation of local-area network (LAN) standards aim to achieve?

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Why was there a need for the creation of metropolitan-area networks (MANs) and wide-area networks (WANs)?

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What problem did the International Organization for Standardization (ISO) aim to address with the creation of the OSI Model?

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What is the primary responsibility of the Presentation Layer (Layer 6) in the OSI Model?

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What is a key responsibility of the Session Layer (Layer 5) in the OSI Model?

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Which layer in the OSI Model is responsible for insuring reliable data transport across the network?

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What does WAN stand for in networking?

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Which organization released the OSI reference model in 1984?

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What is the purpose of routers in a network?

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What is the primary function of LAN standards?

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What was needed to move information efficiently from one business to another?

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What is the primary responsibility of a network interface card (NIC) in a personal computer?

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What is the main function of a hub in a network?

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What distinguishes end-user devices from network devices?

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How do switches differ from hubs in the context of data transfer management?

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Which layer of the OSI Model is responsible for breaking up the data from the sending host and reassembling it in the receiver, as well as ensuring reliable data transport across the network?

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What is the primary role of the Session Layer (Layer 5) in the OSI Model?

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In networking, which device is responsible for connecting multiple hosts together?

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What is the primary function of WANs (Wide Area Networks) in networking?

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Which layer of the OSI Model is responsible for presenting data in the required format, including code formatting, encryption, and compression?

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What does a network interface card (NIC) primarily provide to a host device?

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Why did Cisco become the de facto standard of routers?

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What problem did the International Organization for Standardization (ISO) aim to address with the creation of the OSI Model?

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What was the early solution for creating compatible network hardware and software from different companies?

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What is the primary responsibility of the Presentation Layer (Layer 6) in the OSI Model?

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What does LAN stand for in networking?

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Which organization released the OSI reference model in 1984?

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Flashcards

End-User Devices

Devices such as computers and printers that provide services directly to the user.

Network Interface Card (NIC)

A hardware component that connects a host device to a network.

Function of Switches

Devices that manage data transfer to reduce collisions and enhance efficiency.

Role of Routers

Connects multiple networks and routes data between them.

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LAN Standards

Ensure compatibility between hardware and software from different manufacturers.

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WAN

Wide Area Network; connects multiple LANs over large distances.

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LAN

Local Area Network; connects devices in a small geographical area.

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MAN

Metropolitan Area Network; connects networks within a city.

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OSI Model Purpose

Created to resolve hardware and software incompatibility in networking.

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Presentation Layer

Layer 6 of OSI; formats data, handles encryption and compression.

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Session Layer

Layer 5 of OSI; establishes and manages connections between applications.

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Transport Layer

Layer 4 of OSI; ensures reliable data transport and reassembly.

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Hubs

Simple devices that connect multiple network devices without managing data transfer.

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Differences Between Hub and Switch

Switches manage data transfer efficiently; hubs do not manage data.

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End-User vs. Network Devices

End-user devices serve the user; network devices serve the network.

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Data Collisions

When two data packets attempt to enter the network simultaneously.

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Connection Types

Different methods used by routers and switches to connect networks.

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Network Topologies

The arrangement of different connections in a network.

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Ethernet

Common LAN technology that connects devices in a wired network.

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Wireless Networks

Networks that use radio waves instead of wires to connect devices.

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Bandwidth

The maximum data transfer rate of a network.

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IP Address

A unique address assigned to devices on a network for identification.

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Subnet

A segmented piece of a larger network.

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Protocol

Rules governing how data is transmitted over a network.

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Firewall

A security device that monitors and controls traffic between networks.

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Network Security

Measures taken to protect data during transfer on a network.

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Virtual Private Network (VPN)

A secure network connection over the internet, protecting user data.

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Data Packet

A formatted unit of data carried over a network.

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Study Notes

End-User Devices

  • End-user devices include computers, printers, scanners, and other devices that provide services directly to the user.

Network Interface Card (NIC)

  • A NIC is also called a network adapter or network card.
  • The primary responsibility of a NIC is to provide a host device with a physical connection to a network.

Switches

  • Switches add control to data transfer management, making it more efficient and reducing data collisions.

Routers

  • The primary function of a router is to connect multiple networks together and route data between them.
  • Routers are responsible for connecting multiple hosts together.
  • The primary role of a router is to determine the best path for data to travel between networks.

LAN Standards

  • The primary function of LAN standards is to ensure that hardware and software from different companies are compatible.

Network Classifications

  • WAN stands for Wide Area Network, which connects multiple LANs over a larger geographical area.
  • LAN stands for Local Area Network, which connects devices in a smaller geographical area.
  • MAN stands for Metropolitan Area Network, which connects devices in a city or metropolitan area.

OSI Model

  • The OSI Model was created by the International Organization for Standardization (ISO) in 1984 to address the problem of incompatible network hardware and software from different companies.
  • The primary responsibility of the Presentation Layer (Layer 6) is to present data in the required format, including code formatting, encryption, and compression.
  • The primary responsibility of the Session Layer (Layer 5) is to establish, manage, and terminate connections between applications.
  • The primary responsibility of the Transport Layer (Layer 4) is to ensure reliable data transport across the network.
  • The Transport Layer is responsible for breaking up the data from the sending host and reassembling it in the receiver, as well as ensuring reliable data transport across the network.

Network Devices

  • A hub is a simple network device that connects multiple devices together, but it does not control data transfer.
  • Switches differ from hubs in that they add control to data transfer management, making it more efficient and reducing data collisions.
  • End-user devices are distinguished from network devices in that they provide services directly to the user, whereas network devices provide services to the network.

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