wired and wireless networks 1.4

wired and wireless networks 1.4

1. packets

   • each packet contains the address of the sender and receiver (IP address)
   • packets contain a sequence number
   • packets have a time to live (how many hops around the network they can take before they disappear
   • data transmitted is broken down into packets

2. wireless access point

   • allows for expansion
   • accessed through devices
   • doesn't change ip address
   • needs a ethernet cable

3. router

   • brains
   • manages information from the computer
   • 4 ports
   • applies a subnet mask to identify which network packets should be sent to

4. switch

   • stores information
   • allows you to communicate with the LAN
   • 5 - 24 ports
   • extension to the router

5. network interface card

   • allows you to go online
   • mac address
     • physical hardware address - never changes

6. transmission media

   • what us are using to get onto the server
     • wireless
     • ethernet
     • fibre optic
     • coaxial

7. DNS

   • domain name server
   • list of domain names and their associated IP address
   • without the DNS server we would have

8. hosting

   • in order to let other people see your website, it will be placed on a web server. This known as hosting