storage & connectivity devices. internal / external hard drive also known as hard disks internal...
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Storage & Connectivity
Storage & Connectivity
Devices
Storage & Connectivity
Internal / External Hard Drive
• Also known as hard disks• Internal drive stores the operating system software,
application software and the user’s documents• External drives come in various sizes and is connected via a
USB cable and has an external power source• Prices vary depending on size• Is portable
Storage & Connectivity
Solid State Drive• A high-performance plug-and-play storage device that
contains no moving parts• SSD components include either DRAM or EEPROM memory
boards, a memory bus board, a CPU, and a battery card• Because they contain their own CPUs to manage data
storage, they are a lot than conventional hard disks
Storage & Connectivity
Magnetic Tape• Use as external drive for storing large amounts of data on a
magnetized medium• Typically used by organisations for backing up vast amounts
of data• Can be set up to do this automatically
• Sturdy and durable for long term use• Slow to retrieve and search for data
Storage & Connectivity
Optical Storage Device• Read and written to by laser• CDs holds 650-800MB of data• DVDs holds up 17GB of data. Comes in different forms:
• DVD-ROM: Read only• DVD-R: Record• DVD-RW: Re-writable
• Blue-ray disks holds up to 25GB of data (single layer) or 50GB (dual layer)• Used mainly for large and high quality content
Storage & Connectivity
Memory Sticks and Cards• Used for storing and transferring files• Connected via USB• Small, lightweight to carry around and cheap• Large storage capacity for their size• Easy to lose / damage• Now can get encrypted so more secure
Storage & Connectivity
Cloud Storage• Storage capacity accessed through the internet or a wide area
network (WAN) connection• Purchased on an as-needed basis
• Users can expand capacity almost without limit
Storage & Connectivity
Connectivity Devices
Storage & Connectivity
Network Interface Card (NIC)
• Allow user to connect to networks via Ethernet cable or Wi-Fi• Nowadays integrally fitted into the motherboard• Most modern computers will include wireless network facility
in addition to the cabled connection
Storage & Connectivity
Modem• Enables a computer to transmit data over, for example,
telephone or cable lines• Computer information is stored digitally, whereas
information transmitted over telephone lines is transmitted in the form of analogue waves
• A modem converts between these two forms
Storage & Connectivity
Routers• Typically small, box-like pieces of equipment that multiple
computers can connect to• Joins together multiple local area networks (LANs) with a
wide area network (WAN or the Internet)
Storage & Connectivity
Hubs and Switches• Hubs connects multiple computers together in a network
• Allows each device to talk to the others• Anything that comes into one port is sent to all the
others (computers)• Switches are more efficient than hubs sometimes called
(intelligent hubs”• Only sends data to where it should go rather than all
ports