Parameter
|
E-Mail
|
Mail
|
Description
|
Electronic mail is a method of exchanging digital messages from an
author to one or more recipients. Email operates across the Internet or other
computer networks.
|
The mail or post is a system for physically transporting documents
and other small packages, as well as a term for the postcards, letters, and parcels
themselves.
|
Address
|
It uses Electronic address to send or receive messages.
|
Physical Address is used to send or receive messages.
|
Route
|
No Specific route is followed
|
Specific Route is Followed
|
Stamps
|
Uses Digital Stamps
|
Physical Stamps are used
|
Cost
|
Very Much Cheap
|
Costlier than Email.
|
Time
|
E-Mails are delivered in very short duration from seconds to
minutes.
|
Delivery is slow and may be in days or months. |
Saturday, September 5, 2015
Difference between Mail and E-mail
Monday, February 9, 2015
Difference Between Microprocessor and Micro Controller
Parameter
|
Microprocessor
|
Micro controller
|
Description
|
It is Multipurpose, Programmable
device that accepts digital data as input from external input unit, processes
it as per instructions in its memory, and provides results as output at
external output unit.
|
It is a Self Contained System with
a processor core, memory, and peripherals and can be used as embedded system.
|
Software Protection
|
Software Protection is less
achieved in Microprocessor based systems.
|
Micro controllers offer more
software protection by locking the on chip memory and is made protected from
external circuit.
|
Input/output Devices
|
Keyboard, Mouse, Screen, disks,
printers etc.
|
Switches, Relays, LEDs, LCD
Displays, radio Frequency devices ,Sensors
|
Cost
|
High, Because Devices like memory,
disks, and interfaces are connected externally and has to be purchased
separately.
|
Decreased net cost of the embedded
system as a whole, Because no needs to connect external devices like
Read/Write Memory, Timers etc., unless you desire to create something beyond
the limit.
|
Difference between Burst Mode and Cycle Stealing Mode of DMA
Parameter
|
Burst Mode of DMA
|
Cycle Stealing Mode of DMA
|
Definition
|
It is the DMA data transfer
technique in which no. of data words are transferred continuously until whole
data is not transferred.
|
It is the data transfer technique
in which one data word is transferred and then control is returned to CPU.
|
Data Transfer
|
Data transfer Continues until
whole data is not transferred.
|
Data is transferred Only when CPU
is idle.
|
Speed
|
This is very fast data transfer
technique and is used to transfer data for fast speed devices.
|
It is the slow data transfer
technique as data is transferred only when CPU is idle
|
CPU Utilization
|
Low CPU Utilization because CPU
remains idle until whole data is not transferred.
|
High CPU utilization because data
is transferred when CPU has no task to perform.
|
Difference between LED and OLED Display
Parameter
|
LED
|
OLED
|
Acronym for
|
Light Emitting Diode
|
Organic Light Emitting Diode
|
Description
|
It is a flat panel display that
uses array of light emitting diodes as video display.
|
It is also a type of LED in which
organic compound is used as emissive electroluminescent layer to emit light
when electric current is supplied to it. These OLEDs are self illuminating.
|
Brightness
|
LED displays can get extremely
bright and have slight advantage.
|
OLED display can also produce
brighter displays but shining OLED pixels to maximum results in reduced pixel
life.
|
Flexibility
|
Hard Material is used as substrate
and can not be used to make flexible displays.
|
OLED can be fabricated on plastic
substrates and can be used for making roll up display and can be embedded in
cloths in future.
|
Black Level
|
LED displays rely on LED
backlights behind an LCD panel and can no produce dark blacks even with
advanced dimming techniques that dim LEDs. Hence, LED Displays suffers to
produce dark levels.
|
Dark blacks are the important
factor to achieve excellent picture quality allowing higher contrast and
richer colors and resulting more realistic images. OLED reigns as the
undisputed champion, When it comes to black levels.
|
Difference Between Wi-Fi and Wi-Max
Parameter
|
Wi-Fi
|
Wi-Max
|
Acronym for
|
Wireless Fidelity
|
World Interoperability for
Microwave Access
|
Description
|
It is a wireless technology that
allows any electronic device to exchange and transfer data wirelessly.
|
It a wireless technology which
delivers carrier class, high speed wireless broadband at low cost and
covering large distance than Wi-Fi.
|
IEEE Standard
|
IEEE 802.11
|
IEEE 802.16
|
Implementation
|
It is basically an implementation
of wireless Local Area Connection within a small building, a college, or an
institutional building.
|
It is a wireless broadband
metropolitan technology whose objective is to interconnect houses, buildings,
or even hot spots to allow communication between them or with other networks.
|
Cost
|
Can be implemented by using low
cost access pints.
|
Wi-Max technology requires costly
infrastructure.
|
Frequency band
|
2.4 GHz to 5 GHz
|
Licensed/Unlicensed 2 GHz to 11
GHz
|
Channel Bandwidth
|
Wi-Fi 802.11b= 25 MHz
Wi-Fi 802.11 a/g=20 MHz
|
Adjustable 1.25 M to 20
MHz
|
Full/Half Duplex
|
Half Duplex
|
Full Duplex
|
Subscribe to:
Posts (Atom)