Zusammenfassung der Ressource
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