Zusammenfassung der Ressource
HARDWARE/NETWORKING
- KEY TERMS
- PROTOCOLS
Anmerkungen:
- how one comp can talk to another…it’s the set of rules we use that comps talk to other comps
- TRANSIMISSION CONTROL PROTOCOL/INTERNET PROTOCOL (tcp/ip)
- HTTP
Anmerkungen:
- -who uses this? Web browser AND SERVERS SEND WEB PAGES
- VALUE ADDED NETWORK (van)
Anmerkungen:
- Private network
Provided by a third party
for exchanging infor through a high capacity connection
- VIRTUAL PRIVATE NETWORK (vpn)
Anmerkungen:
- A way to use the public telecommunication infrastructure (e.g., Internet) to provide secure access to an organization’s network
- VOIP
Anmerkungen:
- VoIP uses existing Internet infrastructure to route calls
- PACKETS
Anmerkungen:
- CONTAINS PART OF A MESSAGE AND ADDRESS OF DESTINATION COMPUTER
ROUTERS INTERPRET PACKETS
- PING
- REMOTE DESKTOP
- TRACERT
- o Unguided
Anmerkungen:
- 6 HARDWARE COMPONENTS
- 1. CPU
Anmerkungen:
- Hardware the interprets and executes the program (software) instructions
and coordinates how all other hardware devices work together
RISC chips limit # of instructions and run faster than CISC chips
- consists of two primary elements
- arithmetic/logic unit
Anmerkungen:
- ALU
responds to the
control unit and does whatever it dictates, performing either arithmetic or logic
operations.
- Control unit.
Anmerkungen:
- interprets software instructions and tells the other hardware devices what to do, based on software instructions
- SPEED FACTORS
- CLOCK SPEED
Anmerkungen:
- # of CPU cycles per second determines how fast a CPU carries out software instruction
More cycles=FASTER
- GHz
Anmerkungen:
- the number of billions of CPU cycles per second
- MHz
Anmerkungen:
- the number of millions of CPU cycles per second
- WORD LEGNTH
- BYTES
Anmerkungen:
- * How many bits in a byte=8 bits
* One character is one bytes or 8 bits
* GREG-how many bytes ? 4…how many bits 8*4=32
- BUS WIDTH
Anmerkungen:
- the size of the internal electrical pathway along which signals are sent from one part
of the computer to another. A wider bus can move more data, hence faster processing.
- Wider
the
electrical
pathway
the faster
- CHIP LINE WIDTH
Anmerkungen:
- Distance between a transistor on a chip
- shorter the faster
- 2. PRIMARY STORAGE
Anmerkungen:
- The computers main memory, which consists of:
-RAM
-Cache Memory
-ROM
Directly accesible to the CPU
- CACHE MEMORY
Anmerkungen:
- Ultra fast memory to store recently used or most used data
- RAM
Anmerkungen:
- -Computer' primary working memory
-Accessed directly by CPU
-often called read/write memory
-VOLATILITY: Does not retain memory when comp goes off. RAM is wiped clean
- VOLATILITY
- ROM
Anmerkungen:
- Does not lose contents when switched off
Stores essential computer programs that user nor comp can erase
MEMORY CARDS AND STICKS ALSO
- FLASH MEMORY
Anmerkungen:
- Compact and portable ROM
PDAs and cell phones make extensive use of ________ to store the operating system and applications
that are included with the device.
- 3. SECONDARY STORAGE: LARGE VOLUMEs
Anmerkungen:
- The equipment to store large volumes of data for long-term storage
-diskette
-Hard Drive
-Memory Card
-CD
- CD
- HARD DRIVE
- Stored in BYTES
- GB
Anmerkungen:
- MB
Anmerkungen:
- TB
Anmerkungen:
- STORAGE TYPES
- MAGNETIC MEDIUM
Anmerkungen:
- Uses magnetic techniques to store and retrieve data on disks or tapes coated with magnets
First form-Mag Tape
Recent-HARD DRIVE
- OPTICAL MEDIUM
Anmerkungen:
- stores information in the form of tiny pits which can then be read by a laser
- DIGITAL VIDEO DISK (DVD)
Anmerkungen:
- CD-ROM Format capable of 17GB
- 4. INPUT DEVICES
Anmerkungen:
- Equipment used to capture information and commands
-Keyboard, scanner, mouse, etc
- 5. OUTPUT DEVICES
Anmerkungen:
- The equipment used to see, hear, or otherwise accept the results or information processing requests
-Monitor, printer, etc
- 6. COMMUNICATION DEVICES
Anmerkungen:
- Equipment used to send information and receive it from one location to another
-Modem
- COMMS
- CONCEPTS
- WHAT TO LOOK FOR IN COMP SPECIFICATIONS
- Necesary steps to setting up an online presence
Anmerkungen:
- Select a distribution channel for shipping the goods
Set up a method for collecting payments
Create a web site for the business
- o Know different media and advantages and disadvantages
Anmerkungen:
- MEDIA IS WHAT CARRIES THE SIGNAL BETWEEN COMPUTERS
- WIRE MEDIA
- TWISTED PAIR
Anmerkungen:
- Refers to a type of cable composed of four (or more) copper wires twisted around each other
within a plastic sheath?
- COAXIAL
Anmerkungen:
- METALIC SHIELD WITH A SINGLE WIRE IN MIDDLE AND ISOLATED FROM SHIELD BY INSULATOR
GROUNDING FEATURE ALLOWS FOR LOTS OF CO CABLES TO BE PLACED IN A SHEATH WITHOUT LOSS OF DATA INTEGRITY
- FIBER
Anmerkungen:
- uses pulses of light to transmit the data
Light-fastest but most expensive