Computer Networks Flashcards
Define a computer network
a group of devices that are connected to offer certain services
What are the 3 different types of devices
- End devices
- Intermediary devices
- Peripheral devices
What are the classifications of networks based on media?
- wired
- wireless
What are end devices (hosts) in a network
Devices that act as the source or destination of messages and have unique physical & logical addresses.
What roles can end devices perform
They can function as a client, server, or both.
What are intermediary devices
Devices that connect hosts to a network, connect networks together, and permit or deny the flow of data
What are network peripherals
Devices that rely on connected hosts for communication (as they are connected to hot) and do not have a logical address
What is an example of an intermediary device
router
What are the three main types of network media
- Copper wires – transmit electrical pulses.
- Fiber-optic cables – transmit light pulses.
3.Wireless – uses electromagnetic waves (radio, microwave, infrared).
What are the two network types
- LAN
- WAN
What does LAN stand for
local area network
What does WAN stand for
wide area network
What is the classification for LAN based on its size
covers a single geographical area and is managed by one organization.
What is the classification for WAN based on its size
connects LANs over long distances, often using TSP to connect these networks
Define the internet
a global mesh of interconnected networks
Who owns the internet
No single entity owns the Internet; it is maintained by multiple organisations.
What are communication protocols
A set of rules that allow computers to communicate, similar to human languages.
What are the four layers of the TCP/IP model
- Application- HTTP
- Transport - TCP
- Internet - IPv4
- Network access - Ethernet
What are the layers of the OSI model
- Application
- Presentation
- Session
- Transport
- Network
- Datalink
- Physical
What is segmentation
The process of breaking data into smaller units for transmission.
What is encapsulation
Wrapping data with necessary protocol information at each layer before transmission.
What is the difference between Physical and Logical addressing
- Physical Address (MAC) – Unique identifier for a device on a network.
- Logical Address (IP) – Address assigned based on network topology.
