What is RAM?
Random Access Memory
Available for OS, programs and processes.
Volatile Memory - Data is not permanently written
HDD vs SSD
Hard Disk Drive
- cheaper
- draws more power (kills battery faster)
- bigger capacity
Solid State Drive
- no moving parts
- expensive
- smaller capacity
- less power draw
3 Rules of Backup Policy
Have more than one VERIFIED copy in more than one physical location.
UDP vs TCP
User Datagram Protocol
- No retransmission if packets are lost
- more simple
- faster
- efficient
Transmission Control Protocol
- Retransmits lost packets
- slower
Why isn’t a remote control a computer?
- not programmable
- not designed to accept data
- does not perform math
- does not display results
- does not store program
- does not retrieve info from memory
What is a Firewall?
Software designed to prevent unauthorized access to or from a private network.
What is a Port?
A communication end point used by the transport layer, protocols of their IP.
What is a Host?
Computer or Network that communicates resources to other hosts on a network.
Computer Peripherials?
Inputs:
- keyboard
- mouse
- microphone
- usb
Outputs :
- printer
- monitor
- speaker
- projector
CD - ROM
- non- reliable
- 750mb limit
What is computer memory measured in?
Bits and Bytes
What is an Operating System?
Software that manages computer hardware and creates user interface that allows the user to input information.
Types of OS?
- DOS
- Linux
- Android
- Blackberry
- Mac
3 Rules for Naming a File
- No capitals
- no spaces
- no special characters
3 Services a Host may Provide
- control panel
- code support
- databases
Why would a website FAIL to load?
- Sharks ate cables
- mismanaged domain
- IP address changed
- infected with malware
- connection is faulty
- the host could be upgrading
- browser incompatibility
What is a Web Browser?
Software used for accessing the information on the World Wide Web and interprets code in the visual view.
Where is Silicone Valley?
The San Francisco Bay
What are MX Records?
Mail Exchange Records
Used on behalf of receiving messages for a domain. Can purchase multiple to ensure messages get through.
What are the 3 types of Hosting?
Shared
- cheap
- non- customizable
- low space
- quick set up
- limited resources
Virtual Private
- more customizable
- more space
- more security
- more resources
Private
- expensive
- complete customization
- lots of space
- very secure
How would you manage your backup?
On google drive, on a external hard-drive and on the computer.
How do you ensure your files are accessible across many devices and/or locations?
- Store on different server than host of website
- Automated back up
- back up your back ups
- test your back ups
