1. Optical fibres use total internal reflection to transfer data. The primary condition for total internal reflection is that the signal must travel from an optically denser medium to an optically rarer medium. Secondly, the angle of incidence must be greater than the critical angle.

Examples of social networking sites are.

Facebook

Twitter

Instagram

Google+

WhatsApp

Quora

LinkedIn

Pinterest

Snapchat

MySpace

Telegram

WeChat

Flickr

Meetup

The following method is used to close the file of MS PowerPoint 2010.

- Click on the File tab and then click on the Close option.

- You can click on the close button appearing on the top right side of the window.

- The keyboard shortcut Ctrl + W can be used.

1. Outlook.com is a personal information manager web app from Microsoft that includes webmail, scheduling, contacts, and tasks services.

2. It was founded as Hotmail in 1996 by Sabir Bhatia and Jack Smith. It was acquired by Microsoft in 1997 and relaunched as MSN Hotmail, later as part of the Windows Live suite of products. As part of Windows Live Hotmail was rebranded.

3. Microsoft phased out Hotmail in October 2011, relaunching the service as Outlook.com in 2012.

The MOD() function in MS 2010 will display the remainder after dividing a number by the divisor.

1. Ctrl + K shortcut is used to insert hyperlink in the document.

2. The web page address, e-mail address, and any other link text or image are parts of a hyperlink.

3. To create a hyperlink field, the link label parameter can be taken from the text dimension of your data source or any expression that returns the value of text.

4. Hyperlink function works with the protocols below:

- http:

-https:

-mailto:

-ftp:

1. HTTP is responsible for locating the domain name and translating it into Internet Protocol S.

2. IP address (Internet Protocol address) is a digital address used to identify a computer or device on the Internet or any other network.

1. Personal email account Microsoft Exchange is usually used to download e-mail to your computer.

2. Microsoft Exchange Server is Microsoft's email, calendaring, contacts, scheduling, and collaboration platform.

3. It is deployed on the Windows Server operating system (OS) for business use.

4. Microsoft designed Exchange Server to provide users with access to the messaging platform from mobile devices, desktops, and web-based systems.