Computer Science AS OCR
-
1-1-structure-and-function-of-the-processor as5 主题
-
1-2-types-of-processor as3 主题
-
1-3-input-output-and-storage as2 主题
-
2-1-systems-software as8 主题
-
2-3-software-development as5 主题
-
2-4-types-of-programming-language as4 主题
-
3-1-compression-encryption-and-hashing as3 主题
-
3-2-databases as3 主题
-
3-3-networks as8 主题
-
3-4-web-technologies as13 主题
-
html as
-
css as
-
css-styling as
-
javascript as
-
variables-and-constants-in-javascript as
-
outputs-in-javascript as
-
selection-in-javascript- as
-
for-loops-in-javascript- as
-
while-loops-in-javascript- as
-
strings-in-javascript- as
-
operators-in-javascript- as
-
nested-statements-in-javascript as
-
functions-and-procedures-in-javascript as
-
html as
-
4-1-data-types as8 主题
-
4-2-data-structures as4 主题
-
4-3-boolean-algebra as1 主题
-
5-1-computing-related-legislation as4 主题
-
5-2-moral-and-ethical-issues as9 主题
-
6-1-thinking-abstractly as3 主题
-
6-2-thinking-ahead as1 主题
-
6-3-thinking-procedurally as3 主题
-
6-4-thinking-logically as2 主题
-
6-5-thinking-concurrently as2 主题
-
7-1-programming-techniques as9 主题
-
8-1-standard-algorithms-and-big-o-notation as8 主题
client-server-and-peer-to-peer as
Exam code:H046
Client-Server
What is a client-server network?
-
Powerful and reliable ‘server’ computers control the network and ‘serve’ the clients with services such as files, email, web access, etc.
-
Clients connect to the servers to access network services
-
In this setup, the server hosts, delivers and manages most of the resources and services to be consumed by the clients
|
Benefits |
Drawbacks |
|---|---|
|
Easier central management |
Single point of failure – if the server goes down, services could be unavailable |
|
Scalability: new clients can be added easily |
It can be expensive to set up and maintain – often need dedicated teams of people to maintain them |
|
Higher reliability as resources are managed centrally |
|
-
Use case: larger organisations where centralised control is needed, and reliability and security are paramount
Client computers connected to different servers
When to use a client-server network
-
The choice between client-server and peer-to-peer depends on the specific needs and resources of the network in question
-
Security, cost, ease of setup, and maintenance requirements should be considered
Peer-to-Peer
What is a peer-to-peer network?
-
This is the simplest type of network
-
In this setup, all computers in the network share equal responsibility, and there is no central server
-
All machines have equal status
-
Each machine is the responsibility of that machine’s user in terms of security, backup, etc.
-
Data is often spread around the network, with each user being responsible for their data
|
Benefits |
Drawbacks |
|---|---|
|
Easy to set up and less expensive than client-server as no administrative staff are needed |
Lack of central control can lead to security issues and vulnerabilities |
|
No dependency on a central server |
Not suitable for large networks as it can have performance issues |
|
Data can be shared directly between systems without the need for a central server |
|
-
Use cases: home networks, small businesses, or for specific applications like file sharing
Peer to peer network example setup
Responses