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Flashcards
What is a computer that is not connected to any other devices called??
A standalone computer.
What’s the name for two or more computers connected together??
A network.
What is a Local Area Network??
Two or more computers connected together within a small geographical area.
What is a bus network??
An arrangement where nodes are connected in a daisy chain by a single central communications channel.
What is a star network??
An arrangement where a central node or hub provides a common connection point for all other nodes.
In a bus network, what is the main limitation of how data can be sent??
It can only be sent in one direction at a time only.
In a bus network, why can only one computer trasmit data successfully at a time??
Because otherwise you’d get data collisions.
What does CSMA stand for??
Carrier Sense Multiple Access
What does CSMA/CD stand for??
Carrier Sense Multiple Access with Collision Detection.
What does CSMA/CD detect??
When two nodes are attempting to transmit data simultaneously.
How does CSMA/CD prevent nodes trasmitting data simultaneously??
Both nodes cease transmission and wait a random amount of time before reattempting.
What does NIC stand for??
Network Interface Card
What is the unique address hardcoded on a NIC called??
A MAC address.
What does MAC stand for??
Media Access Control
How does a switch know which device to send packets to??
It stores the MAC addresses of the devices on the network.
Why is a switch more secure than a hub??
Because it doesn’t send every packet to every device.
Is this a bus or a star network??
A star network.
What is the physical topology of a network??
How the devices are physically connected.
What is the logical topology of a network??
How the devices communicate across the physical topolgies.
How could you make a physical star network behave as a logical bus network??
Using a bus protocol and physical switching.
What is the logical topology of the three computers on the left??
A bus network.
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Metadata
date: 2021-02-01 10:26
tags:
- '@?computing'
- '@?public'
- '@?networking'
title: Computing - Topologies
