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Dream Science and Technology
College
Web Development and Database
Administration
LEVEL II
Complied BY: Beshir A. Dessie, Ethiopia
Digitally signed by Beshir
DN: cn=Beshir, c=US, o=Dream,
ou=Dream,
email=beshirali2009@gmail.com
Date: 2022.10.31 23:56:21 -07'00'

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TVET-PROGRAMME TITLE: Web Development and
Database Administration Level II
1
MODULE TITLE: Configuring and Accessing Internet Services
MODULE CODE: EIS WDDBA2 M03 0322
NOMINAL DURATION: 40 Hours
MODULE DESCRIPTION: Defines the competence required to access
internet and complete basic web search tasks.
At the end of the module the trainee will be able to:
LO1. Manage internet
LO2. Search internet
LO3. Work as a team member

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Content of Internet Service
2
❖ Identifying information contents and service
➢ Identifying information sources and services contents.
➢ Describing contents of information sources
➢ Categorizing information services
➢ Working on information retrieval
❖ Connecting to the internet
✓ Identifying hardware and soft ware requirements
✓ Looking in to connection options
✓ Identifying domain name systems
✓ Exploring the host computer

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Cont(…)
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❖ Working on web browsers
❖Analysing the functions of web browsers
❖ Navigating the internet with Netscape navigators
❖Navigating the internet with internet explorer
❖ Identifying resources on the internet
➢classifying websites
➢ Joining discussion lists and newsgroups
❑ Providing internet services
▪Providing E-mail services, Working with telnet services and Appling FTP
▪ Accessing discussion and Usenet groups
▪Participating in meetings using net meeting

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Cont(…)
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❑ Searching information on the internet
❖ Comparing search engines
❖ Choosing a search engines
❖ Using Boolean searching on the net
❖ Comparing subject gateways
❖ Working with Meta search engines
❑ Saving internet documents
❖ Working on down loading basics
❖ Coping and pasting

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Identifying information contents and service
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❖What is information?
➢ it is a collection of meaningful facts and figures that can be used as a base for guidance
and decision making.
➢it is worth nothing that any fact or figure is not necessarily information.
➢it has to be useful and meaningful for an individual or group.
➢When it is said that information serves as a base for guidance, it means information guides
the activities of individuals, business organizations or societies.

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Cont(…)
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❖When does data become information?
✓ When you put a whole lot of data together that is related to one subject it yields
information.
In other words: (Sets of data) + (relational connection among data sets)
→information
Information source:- produces or selects the message or the sequence of messages to be
transmitted to the destination.
E.g.: The information source could be Violin and the message can be a new music.
The information source could be a distant space craft and the message could be an
image of a planet.

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Elements of a Communication system
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A communication system always consists of five major parts.
1. The information
source
Produces or selects the message or the sequence of messages
to be transmitted to the destination.
2. The transmitter
Coverts the message into a signal suitable for transmission
over the channel.
E.g.: Audio equipment that converts the Violin song into a
sequence of tiny pits on the mirror like surface of a CD.
E.g.: Spacecraft telecommunication system that converts a
photograph of Jupiter into a television signal.
1. The destination The person (or thing) for which the message is intended

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Cont(…)
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1. The channel
The medium that is used to transmit the signal.
E.g.: Channel can be the millions of kilometres of empty
space
Between Jupiter and Earth.
E.g.: Channel can be the surface of CD.
Channel can be noisy. That is when the signal reaches the
receiver it may be slightly garbled.
2. The receiver
A device that reconstructs the message from the received
signal.
E.g.: It could be a large dish antenna.
E.g.: Electronics in the CD player.

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What is information theory?
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Information theory: it is a mathematical study of these five components, individually and
in combination.
Information theory can provide
✓ A way to measure the amount of information produced by a source
✓ A way to measure the ability of a noisy channel.
✓ Provides theoretical basis for data compression.
✓ Offers guidelines for the engineering design of transmitters and receivers.
Information Science: Academic field that deals with the generation, collection,
organization, storage, retrieval, and dissemination of recorded knowledge.

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Cont(…)
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Data Processing (DP): The manipulation of data to transform it into some desired result.
In computer science.
it is the analysis and organization of data by the repeated use of one or more computer
programs.
Data Processing is divided into two kinds of processing:
a) Database processing
b) Transaction processing.
A Database is a collection of common records that can be searched, accessed and modified
such as bank account records.

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Cont(…)
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➢ In Database processing a computerized database is used as the central source of
reference data for the computations.
➢ Transaction Processing
✓ refers to the interaction between computers in which one computer initiates a
transaction and another computer provides the first with the data or communication
required for that function.
✓ it is used to access and update the databases when users need to immediately view or
add information;
✓Examples of systems that involve all of these functions are automated teller machines,
airline reservation system.

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Cont(…)
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❖Data processing cycle: represents the chain of processing events in most
data processing applications. It consists of data recording, transmission,
reporting, storage and retrieval.
✓ The original data is first recorded in a form readable by a computer.
✓ The data are then transmitted to a computer that performs the data
processing functions.
✓ Once the data reaches the computer, the computer processes it.
✓ After processing the data, the computer reports summary results to the
program’s operator.

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Cont(…)
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❑ Self Check question
➢What is information ?
➢Discus the d/f b/n data and information?
➢Explain the categories' of data processing?
➢List in sequence data processing cycle?
➢Define Data Processing ?
➢Explain database?
➢List and explain the elements of communication system?
➢What is the d/f b/n information science and information theory ?

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Cont(…)
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➢What are the source of information ?
➢What is library ?
➢List types of library?
➢What internet and its use ?
➢What is intranet ?
➢Explain Ethernet?
➢List at list 15 Browser software ?
➢Explain search engine ?
➢Show in step by step to block the URL: www.facebook.com?
➢Explain DNS?
➢What are the port number DNS used on internet?
➢Explain the d/f b/n DNs and DHCP and its port number ?

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Library (institution)
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✓ Collection of books and other informational materials made available to people for
reading, study or reference. The word library comes from ‘liber’, the Latin word for
“book”.
The central mission of a library is
✓ To collect, organize, preserve, and provide access to knowledge and information.
✓ Modern libraries maintain collections that include not only materials such as
manuscripts, books, newspapers, and magazines, but also sound and video recordings.
✓ CD-ROMs, Computer Software and Online data.

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Cont(…)
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Types of Libraries:
✓ Public library: To serve the members of the general public
✓ School Library: To serve the students and faculties through the high school level.
✓ College and University Library: To serve the students and faculties higher education.
✓ Research Library- To serve the needs of advanced scholars.
✓ Government Library: To serve the governmental departments and agencies.
✓ Special Library: To serve various organizations, industries, and governmental agencies.

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The End
Thank You for Your Attention!!
10Q!!