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Understand where info is held globally and how it is transmitted (1.2…
- Understand where info is held globally and how it is transmitted
1.2 Storage Media
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Paper: the use of paper as a data storage device. It includes writing, listing and all.
Solid State; a type of non-volatile computer storage that stores and retrieves digital information using only electronic circuits, without any involvement of moving mechanical parts. USB flash drive, Hard drive
Types of Info Access
Handheld: it is not that fast but it is mainly for book reading
Versatility
Adv: portable
disadv: battery may die quickly
example: kindle
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Types of Cable
Fibre-Optic
It is used in lighting, both in the interior and exterior of vehicles.
Advantages: Better reliability, greater bandwidth
Disadvantages: limited application, only used on ground.
Copper (Coaxial)
It is used in lighting, both in the interior and exterior of vehicles.
Advantages: lower error rates, sufficient frequency range.
Disadvantages: It is bulky. It is expensive.
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Types of Internet Access
Dial Up: Range -
2400 bps to 56 Kbps
Speed -
56 kbit/s (using the V.90 or V.92 protocol),
Data Diff -
768k to 1.5 Mbps, with speeds as high as 7 Mbps totally reachable.
Broadband: Speed -
. Each megabit is made up of 1,000,000 bits or 1,000 kilobits.
Data Diff -
fibre uses a newer network of high-speed fibre optic cables that are better able to deliver high-speed data across greater distances, resulting in much faster download speeds for fibre packages
Wireless: Range -
the 2.4 GHz band can reach up to 150 feet indoors and 300 feet outdoors.
Speed -
600 Mbps compared to wired Fast Ethernet at 100 Mbps
Cost -
the cost varies depending on the power of the system, a typical modem ranges from $70-$90.