Zusammenfassung der Ressource
Computer Science Section 1 Mind Map
- TCP/IP Stack
- It is a complete set of networking protocols.
- It is the most common protocol and consists of 4 layers
- Examples are http, ftp, POP3, SMTP, telnet.
- A TCP/IP stack is, roughly spoken, a piece of software for communicating
with other network devices.
- DNS
- Domain name system
- Helps computers exchange data through the internet.
- Which manages a massive database that sources domain names to IP addresses.
- Computers use DNS
servers to look for
domain names you are
trying to access.
- LANs & WANs
- WAN - Wide are network
- LAN - Local are network
- LAN - is very quick however it is
limited to a small area.
- WAN - Larger shared area however it costs a lot and it is not very fast.
- LAN - Advantages; Data can be shared easily,
Central backup, Message, software can be
shared, stored in a central place.
- LAN - Disadvantages; Printing can be slow,
Virus can be spread easily, Greater need for
secutiry, If server fails all workstations will
fail, Cost, Cable damage affects computers.
- WAN - Advantages; There is a wider scale, Far
greater, Can be world wide.
- WAN - Disadvantages; Security is even more
important, vulnerable to hackers, Easy to
intercept data such as bank details and
addresses.
- Packet and Circuit switching
- Packet switching moves data in separate small blocks
- When packets are received
they are reassembled in the
proper sequence to make up
the message