Internet Skills Learning Outcome 5

wifi

Today I learnt about :

  • What is a Hardware ?

Hardware is the physical parts of the computer. Eg. HDD Card

  • What is a Software ?

Software is the apps that let you control the devices eg. Google Chrome

  • 8 Needed things to connect to the internet:
  1. Device
  2. Ethernet cable
  3. Modem
  4. Wifi Booster
  5. Browser
  6. Internet Provider
  7. Satellite
  8. Fibre- Optic Cable
  • Unit to mesure internet speed :

Bits per second ( Mbps )

  • Five advantages of broadband
  1. Faster
  2. Can use WiFI
  3. No need to plug in the landline
  4. Stream and gaming online
  5. No need to dial up
  • How does fiber-optics work ?

Each strand is less than a tenth as thick as a human hair and can carry something like 25,000 telephone calls, so an entire fiberoptic cable can easily carry several million calls. Fiberoptic cables carry information between two places using entirely optical(light-based) technology.

  • Can you name two of the main Internet Service Providers (ISPs) in Ireland?
  1. Virgin media
  2. Eir
  • Modems

Modems use analog signals to encode digital information. They translate binary  (1s and 2s)

  • WiMax is :

The name “WiMAX” was created by the WiMAX Forum, which was formed in June 2001 to promote conformity and interoperability of the standard, including the definition of predefined system profiles for commercial vendors.The forum describes WiMAX as “a standards-based technology enabling the delivery of last mile mobile broadband access as an alternative to cable and DSL”.IEEE 802.16m or WirelessMAN-Advanced was a candidate for the 4G, in competition with the LTE advanced standard.

  • Wi-Fi is :

-Wi-Fi or WiFi is a technology for wireless local area networking with devices based on the IEEE 802.11 standards. 802.11 is the “radio frequency” needed to transmit Wi-Fi, it was defined by Vic Hayes who created the IEEE 802.11 committee.Wi-Fi is a trademark of the Wi-Fi Alliance, which restricts the use of the term Wi-Fi Certified to products that successfully complete interoperability certification testing.

-Devices that can use Wi-Fi technology include personal computers, video-game consoles, smartphones, digital cameras, tablet computers, digital audio players and modern printers. Wi-Fi compatible devices can connect to the Internet via a WLAN network and a wireless access point. Such an access point (or hotspot) has a range of about 20 meters (66 feet) indoors and a greater range outdoors. Hotspot coverage can be as small as a single room with walls that block radio waves, or as large as many square kilometres achieved by using multiple overlapping access points.

-Depiction of a device sending information wirelessly to another device, both connected to the local network, in order to print a document

Wi-Fi most commonly uses the 2.4 gigahertz (12 cm) UHF and 5 gigahertz (6 cm) SHF ISM radio bands. Having no physical connections, it is more vulnerable to attack than wired connections, such as Ethernet.

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