1.5 network topologies v2

1.5 network topologies v2

1. what is a network? - a network is the amount of computers linked together to share resources

   • they share hardware, software and data
     • network protocol is a set of rules or conventions which controls communication between devices
   • what is a mesh network? a mesh network is where all or some of the workstations or other devices are connected directly with eachother.
     • most of them are usually connected by the node that they exchange most data with
   • what is a star network? - where each device is connected via a individual cable directy to the server
     • they are usually in school or offices as they are the mos reliable

2. what are the advanges of ethernet?

   • stable connection - more secure - faster traffic speed - good quality of internet singal
   • POP3 (Post Office Protocol 3) is the most recent version of a standard protocol for receiving e-mail. POP3 is a client/server protocol in which e-mail is received and held for you by your Internet server.
     • HTTP - used by web browser to communicate with web servers IMAP - used to send emails SMTP - used to retrieve emails.
       • TCP is the protocol use to transmit data between differenrt networks

3. what are the advantages of wifi

   • cheap set up costs - slow transfer speeds - more vunerble to hacking - interference may occur
   • static IP address doesn't change unlike the IP address where it changes every timeyou turn the computer back on
     • protocol is a set of rules you need to follow

4. encryption is a method of scrambling data that makes no sense

   • encryption uses a method called "SSL" ( secure socket layer)
     • IP Addresses is a unique number of strings separated by full stops that reconise each computer
       • data travelling on a network are sent by packets
     • a MAC address is a unique code which is built into the NIC (network interface code)
       • each address is indivdual and is made up of 48 bits
     • FTP - file transfer protocol