1.5 - Network Topologies

1.5 - Network Topologies

1. Mesh Network

   • A network where all devices are connected directly to each other

2. Star Network

   • A Network where all devices are connected to a server by an individual wire.

3. Ethernet vs WIFI

   • Benefits of WIFI
     • Cheap set up cost
     • More vulnerable to hacking
     • Quality of signal is affected through walls and other obstructions
     • Has slower transfer speeds

4. Encryption

   • Is a method of scrambling data with a key code that makes no logical sense

5. What is a network?

   • It is a number of devices linked together to share resources - hardware, software and data

6. IP address

   • Unique string of numbers separated by full stops which identifies every device using Internet Protocol to communicate over a network.

7. MAC addresses

   • Media Access Control
   • Come with the device when bought, embedded in during manufature.
   • Built into a Network Interface Card (NIC)

8. Protocols

   • A set of rules/conventions that control the communication between devices on a network
   • Key Protocols include:
     • SMTP
       • Simple Mail Transfer Protocol
         • The internet standard for e-mail
     • IMAP
       • Image Message Access Protocol

9. Packet Switching

   • All data sent through devices is sent in packets.
     • It is broken into packets and given a header which contains the IP adress of the network that it is being sent to.

10. Layers

    • As apacket is prepared, the data travels through layers where protocols manage it, adding or removing extra info as required