Networks - Seneca Flashcards
What are the three benefits of networks?
- Managing computers
- Data exchange
- Resource sharing
How can (what do they do) a network manager manage other computers over a network?
- Updating software
- Fixing problems
- Help users e.g., resetting passwords
What resources are commonly shared over a network?
- Printers
- Scanners
- Internet connections
What are the four factors that affect network performance?
- Topology
- Wired vs wireless
- Choice of hardware
- Bandwidth
Two wired network advantages:
- faster
- more reliable
Define bandwidth
The amount of data that can be transferred in a given time.
What happens to network speed if there are more users in a networks?
The performance can decrease because bandwidth is shared between all these users.
What happens to network speed if there are more users in a network?
The performance can decrease because bandwidth is shared between all these users.
What does LAN stand for?
Local area network
What network covers a small geographical area?
LAN
Where are LANs normally found?
-schools
-homes
-universities
-small companies
Who sets up and maintains a LAN?
The organization that uses it.
What does WAN stand for?
Wide area network
What is the geographical classification for a WAN?
A collection of computers connected over a large geographical area.
What is the most common modern networking model?
Client-server model
What is a client-server?
Computers on the network each take the role of either the central server or a client.
What does the client do in a client server model?
They request service from the server. The server will process the request and then send a response.
How does the server provide service in a client server model?
- Storing files
- Printing
- Hosting a website
Why is the client server model known as centralized?
Because the clients communicate with a central server.
What are the pros of a client server model (5)?
- Clients machines can be monitored centrally
- Users accounts can be managed centrally
- Software and security updates can be managed centrally and applied to all computers this saves time
- Users files can be stored centrally so it is easy to access them from any networked computers
- Team members can easily share files
What are the cons of client server model?
- If the central server fails then the whole network would not be able to function
- Server hardware is usually very expensive
- Servers are often targeted in cyber-attacks: ransomware attacks, denial of service attacks.
What is a peer-to-peer model?
In a P2P network each computer is directly connected together. This removes the need for a central server.
Describe a bit about P2P networks?
- Each ‘peer’ is responsible for connecting and maintaining themselves
- Each ‘peer’ can act as both a client and a server depending on what task they are trying to accomplish
What are P2Ps commonly used for?
- File transfer
- Streaming videos from computer to mobile or TV
- Wireless printing
- Bluetooth speakers
Pros of peer-to-peer model?
- They are robust: if one fails the others can still use the network
- Cheap- no expensive hardware
- Easy to setup
