It Notes
PAN ( Personal area network)
Bloototh\
LAN ( local area NETWORK)
INTERNET
WWAN ( Wireless wide area network)
Cell data
TN ( twisted Nematic) LCD
Fast response Poor viewing angles
Color Shifts
IPS ( in plane switching
Excellent color
More expensive
VA ( Vertical Alignment)
Good color
Slower response
OLED ( Organic light emitting diode)
Thinner and lighter
No backlight
Higher cost
Very accurate color
Inverters
Turns DC into AC
Digitizer
Converts analog to digital
Port Replicator
Have more usb ports or other ports
2g networks
GSM ( Global System for mobile communications)
Eurpean standard
Used SIM card
Everyone gets little time for calls
CDMA( code Division Multiple Access)
Everyone can communicate at the same time
Poor data support
Good voice
3G network
Faster data than 2G
Mobile TV
VIDEO ON DEMNAND
4G AND LTE
LTE ( LONG TERM EVOLUTION)
GSM based
Better coverage and speed
5G
10gigs speed
Higher frequencies
IoT ( internet of things)
Have multiple devices on the internet
PRL ( Preferred roam list)
MDM ( Mobile Device Management)
To mange workers Phone and to trouble shoot
Set phone to company standards
TCP UDP
Encapsulated inside the IP
Two ways to move data from place to place
( multiplexing)Use many different applications at the same time
TCP ( Transmission control Protocol)
Connection oriented
Reliable delivery
Recovery from errors
Re-orders messages that got scrambled
Flow control
Very organized
UDP ( user datagram Protocol)
Connectionless
Send date to one place to another
No error recovery
Not organized
May loose date
No flow control
DHCP ( Dynamic Host Configuration Protocol)
Will Resend data if not got of confirmation of full delivery
Automated config of ip addresses
Use lease and must renew
Can reserve Ip adress
TFTP ( Trivial File Protocol)
Both use UDP
HTTPS ( Hypertext Transfer Protocol Secure)
Send info to web Browser
Communication in the browser
SSH ( Secure Shell)
Send info in our system
Both have a return receipt
IP moves data from one place to another
Port Number
Sorts ware the data in the IP goes. Organized packages
IPv4 Sockets
VoIP ( Voice over Internet Protocol)
Web address used TCP
FTP ( File Transfer Protocol)
Transfer files between system
Telnet ( telecominication Network
Not sure anyone can see your files transfer
SMPT ( Simple Mail Transfer Protocol)
Server to server email transfer
Can send mail from device to mail server
Only send mail not receive
IMAP ( Internet message access protocol v4)
Management of email box from multiple clients
POP3 ( Post office protocol version 30
Are for receiving mail Basic mail transfer
DNS ( Domain Name system)
Converts names to IP adresses and ace versa
Distributed naming system
Managed by the sip or enterprise it deparmet
SMB (server message block)
Used by Microsoft
File sharing printer sharing
Also called CIFS ( common internet file sharing)
NetBIOS ( Network basic input/output system)
UDP/137 name service
TCP/139 set session service
RDP (Remote Desktop Protocol)
Share desktop from a remote location
Can connect to entire desktop or app
Access point
Extend network
PoE ( Power over ethernet)
HUB
Multi port repeater
Becomes less efficient as network increases
ONT ( optical Networks termina)
Fiber netwrok
NIC ( network interface card)
Most electronics have it installed
Or can get a expansion card
MIMO ( multiple input multiple output)
RFID ( Radio frequency identification)
Tracking
PATA (parallel ATA)
Can only support 2 devices at a time
DORA
Discover- Find a DHCP server
Offer- Get an offer
Request- Lock in offer
Acknowledge - DHCP server confirmed
APIPA ( Automatic private IP Adressing)
No forwarding by routers
LAN ( local area network)
Group of devices in the same broadcast
USE ETHERNET to connect or WIFI
VLAN ( virtual local area network)
Group of devices in the same broadcast domain
Separated logically instead physically
WAN (wireless Area Network)
Global connected devices
Connect LAN across distance
Much slower than LAN
MAN ( metropolitan area)
Network in your city
Larger than LAN smaller than WAN
100BASE-T cat5 100meeters
10GBASE-T cat6 55 meeters unshielded
100 shielded
CAT Cable termination
T568A
white and green
Green
White and orange
Blue
White blue
Orange
White brown
Brown
T568B
White orange
Orange
White green
Blue
White blue
Green
White brown
Brown
SCSI (Small computer system Interface)
Connects many devices to one single computer
16 devices in a scsi chain
EX. Scanners tape drives cd-rom drives
Can name each device connected
RAM (Random Access Memory)
Load up app and documents
Can assign some ram to ssd or hard drive by VRAM
DIMM ( Dual Inline Memory Module)
SODIMM
For mobile devices and laptops
RAID ( Redundant array of independent disk)
Is not for storage back up
Is for accessing storage at the time and help access memory from a
malfunctioning HD
ATX (Advance Technology Extended)
ATX Motherboard
Are for PC’s. Full size Desk top computers
MINI-ITX
For raspberry PI
Compact computers
Streaming Media
2 types of CPU
Intel for performance
AMD for value
ARM CPU
Are for Mobile divices
Phones
Computers use DC voltage
Power sources provide AC voltage
AMP The rate of electron flow past a point
(The diameter of the hose)
VOLT Electrical pressure pushing the electrons
(How open the faucet is)
WATT Measurement of real power use
Volts x amps = watts
MFD (Multifunction Device)
Printer
Scanner
Fax
Network connection
Phone Line
Pront from web
Complex device with lots of moving parts
Can be very large
Have the proper Print driver
PCL ( Printer command language)
Common used across the industry
Post script
Popular with high end printers
Might use USB type B, ethernet, wifi ,or bluetooth
Laser Printer
Uses imaging drum