wired and wireless network

wired and wireless network

1. Wireless access point

   • It is used for expansion. It needs electricity and a physical connection with the switch to work

2. Router

   • It's the main component of the ethernet.

3. Switch

   • It is the expansion which connects to lots of devices. It can handle 64 ports at a time.

4. Transmission media Wireless, Ethernet, Fiber optic, Co-Axel

   • Fiber Optic - It is very fast but also more expensive.

5. Router - An interconnection device, contains a list of IP addresses, a subnet mask to identify a network and determine where the network should be sent.

6. NIC - a NIC allows a computer to connect to a wired network,allows data packets to and from a computer, contains a mac address which is physical hardware address, allows an ethernet cable to be plugged.

   • NIC - Allows you to talk to the internet.
   • MAC Address never changes.

7. IP address keep changing for safety. Printers, Servers and routers have a fixed IP address.

8. 4 Things in a packet of data - the sender's IP address, the receiver's IP address, Sequence number and its durability

9. DNS Server - URL - Unique Resource Location http - tells the computer to use the hypertext transfer protocol which puts the packets together to be used in a web browser.

   • WWW - tells us that this is a webpage and that it is located on the worldwide web.
   • OCR.ORG.UK - is the domain name.

10. Webpages are made up of html.

    • HTML - Hyper Text Markup Language

11. VPN Provides - privacy, freedom, security.