The basic standardization concept of EDIFACT is that there are uniform message types called United Nations Standard Message. The message types have exactly one nickname consisting of six uppercase English alphabets. The message begins with UNH and with UNT.

Symmetric Key Encryption	ASymmetric Key Encryption
Same key is used for both encryption and decryption	Different keys is used for encryption and decryption
Speed of encryption or decryption is very fast	Speed of encryption or decryption is comparatively slow
Plain text and cipher text are of same size	The size of cipher text is always greater than plain text.
Algorithms like DES, AES, RC4 uses symmetric key encryption	Algorithms like RSA, ECC, DSA use asymmetric key encryption
The number of key used grows exponentially with the numbers of users	The number of key used grows linearly with the numbers of users
Provides confidentiality.	Provides confidentiality, authenticity and non- repudiation.

All Payment cards (including debit card) are usually plastic cards of size 85.60 mm width x 53.98 mm height, rounded corners with a radius of 2.88 mm to 3.48 mm and thickness of 0.76 mm. These standards dimensions are maintained universally in accordance with ISO/IEC 7810#ID-1.
(i) Publisher
(ii) Credit card number
(iii) Name of the card holder
(iv) EMV chip
(v) RFID symbol
(vi) Expiration month and year
(vii) Card brand logo
(viii) Magnetic stripe
(ix) Hologram
(x) Signature
(xi) CVC/CVV

(i) In B2B E-Commerce, commercial transactions take place between different business organizations, through the Internet.
(ii) For example, a cycle company may buy tyres from another company for their cycles.
(iii) When compared to other models, the value per transaction in B2B transaction is high, because of bulk purchases.
(iv) The company also might get the advantage of discounts on bulk purchases.
(v) Out-sourcing and Off-shoring are generally associated with B2B E-Commerce.
(vi) If a company's work is hired to another company, it WOuld be termed as out-sourcing.
(vii) If the work is outsourced to a company, which is outside its own country, it is called off-shoring

Open NMS has three main functional areas:
(i) Services monitoring
(ii) Data Gathering
(iii) Event Management and notification
(i) Services monitoring:
A number of monitor modules can govern if network-based services are accessible (ICMP, HTTP, DNS, etc.).
(ii) Data Gathering:
Data Gathering by SNMP and JMX (Simple Network Management Protocol-SNMP, Java Management Extensions-JMX).
(iii) Event Management and notification:
It comprises of alarm reduction and a robust announcement system with acceleration and duty schedules.

(i) Free software is a concept developed in the 1980s by an MIT computer science researcher, Richard Stallman who defined four conditions, as outlined by the nonprofit Free Software Foundation.
(ii) These "four freedoms" emphasize the ability of users to use and enjoy software as they see fit.
(iii) Freeware usually refers to proprietary software that users can download at no cost, but whose source code cannot be changed.

The four main components used in the Ethernet Cabling are
(i) Patch cable [Twisted pair]
(ii) RJ45 connector
(iii) Ethernet ports
(iv) Crimping tool

(i) If you require a cable to connect two computers or Ethernet devices directly together without a hub, then you will need to use a Crossover cable instead.
(ii) Here, the pairs of Tx and Rx lines are crossed.
(iii) It means pin 1 & 2 of the plug on one end are connected with pin 3 & 6 of the plug on other end, and vice versa (3 & 6 to pin 1 & 2).
(iv) The easiest way to make a crossover cable is to make one end to T568A colour coding and the other end to T568B.

No.	IPv4	IPv6
1.	IPv4 address is a 32 bit unique address given to a computer system.	IPv6 address is a 128 bit unique address given to a computer system.
2.	There are two ways to represent the IP address: Binary notation, Dotted-decimal notation.	It follows Hexadecimal number notation.
3.	The number of address that can be formed is 232.	The number of addresses formed in IPv6 is 2128

There are four total layers of TCP/IP protocol, each of which is listed below with a brief description.
(i) Network Access Layer - Concerned with building packets.
(ii) Internet Layer - describes how packets are to be delivered.
(iii) Transport Layer - ensure the proper transmission of data.
(iv) Application Layer - application network processes. These processes include File transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP), and simple Mail Transfer Protocol (SMTP).

(i) Group information sharing over long distances.
(ii) Broadcast announcements.
(iii) Fostering diversity of thought.

Cloud storage
1. It is just storage of data on online, access in different area no geographical limits was in need.
2. Cloud storage provides users with immediate access to a broad range of resources.
Cloud computing:
1. It is the on demand availability of computer system resources.
2. Especially data storage and computing power, without direct active management by the user

Syntax:
mysqli_connect("Server Name","User Name","password","DB Name");
Example:

The GET and POST methods are used for sending the data to the server and the main difference between them is that GET methods append the data to the URI defined in form's action attribute POST methods attaches data to the requested body.

1. Do whileloop always run the statement inside of the loop block at the first time execution.
2. Then it is checking the condition whether true or false.
3. It executes the loop, if the specified condition is true.
Syntax:
do
{code to executed;
}while (condition is true);

No.	if elseif else statement	if statement
1	If-elseif-else statement is a combination of if-else statement.	If statement executes a single statement
2	More than one statement can execute the condition based on user needs	Only one statement can execute
3	If the condition if false more alternatives are there.	If the condition is false, there is no alternative.

(i) In if...else if...else statements, more than one block of statement can execute based on the condition and user needs.
(ii) If we want to check for another condition in the else part, choose if... elseif ... else statement
(iii) Unlike else, it will execute that alternative expression only if the elseif conditional expression evaluates to "True value.

To pass any number of parameters inside a function.
They are specified inside the parenthesis, after the function name.
Syntax:
function School Name($sname, $Strength)
{
echo $sname." in Tamilnadu and Student Strength is".$Strength;
}

In two ways we can embed PHP code in HTML page.
(i) First way is to put HTML outside of our PHP tags.
(ii) Second way to use HTML with PHP code is by using print or Echo statement.

List of privileges available in MySQL

Privileges	Action Performed (If Granted)
Select_priv	User can select rows from database tables.
Insert_priv	User can insert rows into database tables.
Update_priv	User can update rows of database tables.
Delete_priv	User can delete rows of database tables.
Create_priv	User can create new tables in database
Alter_priv	User can make changes to the database structure.

Evolution of DBMS:
(i) The concept of storing the data started before 40 years in various formats.
(ii) In earlier days they have used punched card technology to store the data. Then files were used.
(ii) The file systems were known as predecessor of database system.
(iv) Various access methods in file system were indexed, random and sequential access.
The file system had more limitations like.
Data Duplication : Same data is used by multiple resources for processing, thus created multiple copies of same data wasting the spaces.
High Maintenance : Access control and verifying data consistency needs high maintenance cost.
Security : Less security provided to the data.
(v) So database systems became popular to overcome the above limitations of file system.

To link Frames containing text
(i) Draw a second frame with the Frame tool of your choice.
(ii) Click the first frame to select it.
(iii) Click on the red triangle to load the text icon.
(iv) Click the second frame. PageMaker flows the text into the second frame.

S.No	Tools	Keyboard Short Cut
1.	Pointer tool	F9
2.	Rotating Tool	Shift + F2
3.	Line tool	Shift + F3

Team comprises of members playing various roles and responsibilities like Script Writer. Production Manager, Content Specialist, Editor, Graphics Architect, Multimedia Architect, Audio and Video specialist, Computer Programmer and Web Master.

They are explained below :
i) Text :
1. Text is the basic components of multimedia and most common ways of communicating information to other person.
2. Text component is classified into two such as (a) Static text (b) Hypertext.
ii) Images:
Images in multimedia are generated in two ways.
a) Raster or Bitmap Images
b) Vector Images.
iii) Animation :
Animation is the process of displaying still images with continuous movement. 
The two basic types of animations are (1) Path animation (2) Frame animation.
iv) Sound :
Sound is a meaningful speech in any language and providing the pleasure of music, special effects and so on.
v) Video :
1. Video is defined as the display of recorded event, scene, etc.
2. The video can be categorized in two types as (1) Analog video and (2) Digital video.