Lesson Notes By Weeks and Term - Senior Secondary 2

Term: 3^rd Term

Week: 9

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 2 periods each

Date:       

Subject:      Computer studies and ICT

Topic:-       Internet II

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Define some more basic Internet terms

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, pictures, Data Processing for senior Secondary Education by Hiit Plc, WAPB Computer Studies for Senior Secondary II by Adekunle et al, On-line Materials.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

NOTE

INTERNET

The Internet as a word, is derived from the term International Network. It is the connection of several computer networks across organizations, states, countries and continents via dedicated routers and servers for the exchange of data, news, opinions and other information.

A network itself, is a system consisting of two or more computers that are connected together to share information

However, computers connected to the Internet share information using the same language or protocol known as TCP/IP, i.e. Transmission Control Protocol/Internet Protocol Through the Internet, billions of information are transmitted and shared Across the world on a daily basis.

COMMON INTERNET TERMS

1. HTTP: This is the short for HyperText Transfer Protocol. It is the standard application protocol used to transfer data over the World   Wide Web, by enhancing communication between web browsers and     web servers.

2. URL: This stands for Uniform Resource Locator. It is the unique web address of a file, program or any other resources that can be located or accessed on the Internet, e.g. http://www.cnet.com/or “ftp://info.apple.com/. This resource can be accessed by typing the URL on the web browser address line.

3. Web Crawler: This is a computer program used by search engines such as Google and Yahoo to constantly search the web in order to index and catalogue the content and pages of other sites and store these information in their database to aid their users search for more information quickly. A web crawler is also called a Web Spider, an Internet bot, an ant, or an automatic indexer.

4. Webcam: This is a Video camera that may be in-built or attached to a computer, which is used to capture, save, view or transmit images and sounds by the Internet users stream them over the web in real-time. It is widely used by skype and other video calling software, for chatting with other users and also monitoring locations such as stores and offices

5. Log-in/Log-out: The process by which a user’s identity is verified by a user ID and password before he or she can gain access to a secured computer network is known as log in, log on, sign in or sign on.

The reverse process by which a user closes off access to the site or exit an account in a computer system when he/she is through is known as log out, log off, sign out or sign off.

Note that when a user logs out, the computer does not recognize he/she anymore until perhaps he/she logs in again

6. ISP: This stands tor Internet Service Provider. This is a company or organisation that provides tor its customers (individuals or organizations), services for participation or access to the Internet for a monthly or annual fee. Examples, Internet Access, Internet Transit, Domain Name Registration, Web Hosting, Usenet Service, Colocation.

7. Intranet: This is a private computer network that allows users to share Information only within an organisation. It can also be described as a local, restricted or internal communication network.

8. Router: This is a networking device that connects two or more networks together. That is, it is the medium through which packets or data travel to and from different devices

9. Bridge: This is a networking device that serves as a link between two or more Networks. It works like a router by allowing information on the Internet to travel from one network to another. However, a bridge does not analyze data that is being forwarded, which makes it faster than the router in transferring data.

10. Packet: This is a single unit of data or a piece of message transmitted over a network. Every packet is made up of two parts, i.e. the user data which is the actual information being sent and the address of the source, which is the destination of the data. The process of sending and receiving packets over a network is called packet-switching. Packets help to improve performance and Reliability of communication between networks.

11. Upload: This is the transfer of data, information, files or programs from a smaller Device, like flash drive or mobile phone to a larger one, like a computer. This transfer can also be made from a personal computer to the Internet server.

Note that any type of transmission that occurs in the opposing direction to the above is known as download.

12. Protocol: This is the standard format (i.e. defined set of guidelines, rules and Conventions) used for transmitting data between two network devices.

13. Cybercafé: This is also called the Internet Café. It is a place which comprises a number of personal computers that provide internet access to the public for a fee charged as a time-based rate, usually per hour or minute. Areas of the network. Since information is always traveling through the Internet, the job of the router is to direct information traffic from one network to another so that every information gets to its required destination

EVALUATION:  1. List and explain eight basic internet terms

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively