4.9.2.1 Network topology Flashcards
What are the benefits of a network?
Provides for more effective data transfer and centralised storage for documents.
Allows internet access from multiple computers creates central control of security, software and backup.
Means that peripherals can be shared
Why do people often use email over paper mail?
An email is delivered faster and the receiver doesn’t have to be at home to pick up the email.
Reduces cost as you don’t have to pay for paper or a stamp and this makes it less effort
Email can be more secure if encrypted
You can attach files to emails and send it to more than one person at once
What is an Internet Service Provider?
Sells clients internet access and IP addresses and provides them with the internet backbone
What are the advantages of a bus network?
Less expensive as there are less cables required
Don’t have to rely on a central node
What are the advantages of a star network?
Improved security as data isn’t sent to every device on the network
More reliable as if one device fails the network can still run
Faster connection as there won’t be collisions
What is the difference between a hub and a switch?
A switch means that data is only sent to the correct workstation and this means devices can send data at the same time which makes transmission faster.
A hub is where data is sent to all workstations so two devices can’t send data without causing a collision
What will cause slowdown of a network?
Collisions between packets when two stations send data at the same time
What is the difference between a physical and logical topology?
Physical topology - the way the network is actually wired
The layout/arrangement/architecture of the cabling/wiring/connections (between the devices/computers on the network);
Logical topology - How the data/packets flows around a network // architecture of the communication mechanism in a network;
A star network with a hub is working like a bus network , physically like a star and logically like a bus
