INTRODUCTION TO THE INTERNETPART3 

Internet Terminologies - Part 3

Modes of Internet Connection 

You can connect to the Internet by using one of the following three modes of Internet connection: 

•  Dial-up 

• Broadband 

• Wireless 

Dial-up

A dial-up connection establishes a link between your computer and ISP through a telephone line. To establish a connection, you need to dial the number of the ISP server. The speed of a dial-up connection is slow, usually around 56 kilobits per second (kbps). A dial-up connection is inexpensive, and you only need to pay local call charges each time you dial the Internet. When you are using the Internet through a dial-up connection, you cannot make or receive regular phone calls by using the same line at the same time.

Broadband 

The term broadband refers to communication media (connecting lines/cables) with broad bandwidth. Bandwidth is the amount of data that a communication medium can carry in one time unit. Therefore, broadband refers to communication media capable of carrying a large amount of data per unit time. Broadband provides high connection speeds, usually in the range of 256 kbps to 8 megabits per second (mbps).

In a broadband connection, data is transmitted through a variety of media, such as:

 Cables: In this mode, the cable provider provides the broadband connection through the same connection line that delivers cable TV. This mode provides good speed of access. However, it is not available in all areas. 

Digital Subscriber Line (DSL): In this mode, the existing telephone line is used to provide the Internet connection. However, it does not restrict you from making or receiving telephone calls while you are using the Internet. 

Satellite: In this mode, the Internet connection is provided with the help of a satellite dish that is installed on your house. The satellite connection is slower than cable and DSL.

Wireless 

You can also connect to the Internet wirelessly. Let us understand some of the wireless connections: 

Wi-Fi: In case of a Wi-Fi network, data signals are transmitted wirelessly. Wireless networks use radio waves instead of cables to connect to the computer device. To set up a Wi-Fi connection at your home, you need.

• A broadband Internet connection. 

• A wireless router.

•  A computer with a wireless Internet card or an external wireless adapter. 

The wireless router transmits wireless signals that are received by the wireless Internet card or external wireless adapter installed on your computer. Wireless networks are convenient. However, they are slower than wired networks, especially when the number of users is high. In addition, the security of transmitted data is a major concern in case of wireless networks. 

Various public locations, such as airports, hotels and restaurants, provide free internet access to the public. To make this possible, Wi-Fi hotspots are installed at these locations. Wi-Fi hotspot is a site that offers Wi-Fi access. People can use a laptop, a smartphone or any other suitable device to connect to the Internet by using the Wi-Fi hotspot.

WIMAX : Worldwide Interoperability for Microwave Access (WIMAX) is a wireless telecommunication technology that provides wireless broadband access over larger distances than Wi-Fi. WiMAX uses a tower, similar to a cell phone tower, to transmit microwave signals. This tower is called a WiMax Base Station and is connected to a wired, high-speed Internet connection. WiMAX can provide broadband wireless access up to 30 miles. Moreover, WiMAX networks are faster than Wi-Fi. 

Parts of a URL 

Consider a URL, https://www.w3schools.com/html/default.asp. 

In the preceding URL: 

• http://: Specifies that the Hypertext Transfer Protocol (HTTP) is to be used for accessing the required information over the Internet. A protocol defines a common set of rules used by network computers to share data and communicate. Two computers must use a common protocol to be able to communicate with each other. For example, if you are talking in a group, you need to follow a certain set of rules for an effective communication, such as listen to others in the group and do not interrupt in between. 

In the same way, two or more computers must use a set of rules for communicating effectively with each other.

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