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17926736
Revision cs
Descripción
cs
Sin etiquetas
cs
gcse
Mapa Mental por
Charlie Beeson
, actualizado hace más de 1 año
Más
Menos
Creado por
Charlie Beeson
hace alrededor de 5 años
11
0
0
Resumen del Recurso
Revision cs
Layers
Application
Where user can interact with apps and communicate
HTTP/S, POP, IMAP, SMTP, FTP, DNS
Transport
Sets up communication rules
TCP
Internet
Puts data into packers and assigns addresses
IP
Network
Sends packet to receiver
Ethernet/ wifi
Advantages
Reduces complexity
Standardised interfaces
Facilities modular development
Range of developers can contribute
Development is faster
Roles of Computers
Client server
Security
Server controls security
good
Management
Server manages network
Needs dedicated team
Dependency
clients depends on server
if server crashes whole network fails
Performance
Server can be upgraded to cope with high demand
good
Backups
Data backed on main server
Peer to peer
Security
no central control over security
poor
management
no central control
Anyone can set up
maintenance more diffucult
Dependency
Clients not dependent on central server
Backups
Each computer has to be backed
Data can easily be deleted by users
Forms of attack
Malware
Malicious software with intention to cause damage or steal
Most common form of attack
Phishing
Fraud Emails
Tricks user to share info
SQL injection
used to view/ change data by inserting additional code
dangerous
DDOS
Floods server with traffic
essentially crashes server
Hacking
gaining unauthorised access to computer system
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