Divya Arora Presentation Section B

8/6/2019 Divya Arora Presentation Section B

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DATABASE MANAGEMENTDATABASE MANAGEMENT

SYSTEM & NETWORKINGSYSTEM & NETWORKING

ByBy

Divya AroraDivya Arora



CONTENTCONTENT

Fundamentals of DatabaseFundamentals of Database

Introduction to DBMSIntroduction to DBMS

Advantages of DBMS Advantages of DBMS

Data CommunicationData Communication

ComponentsComponents

Process of Da

ta

Comm

unica

tio

nPro

cess of Da

ta

Comm

unica

tio

n

Network TerminologiesNetwork Terminologies

Types of TopologyTypes of Topology



Fundamentals of DatabaseFundamentals of Database

Data: Data can be anything such as number, person, image, sound Data: Data can be anything such as number, person, image, sound

etc.etc.

Information: It is a set of organized and validated collection of data. Information: It is a set of organized and validated collection of data.

Database: It is an organized collection of interrelated file under Database: It is an organized collection of interrelated file under

single headingsingle heading

Table: A logical storage unit which holds data in form of row and Table: A logical storage unit which holds data in form of row and

column.column.

Field/Column: The smallest unit which has meaning to its users, isField/Column: The smallest unit which has meaning to its users, is

called field.called field.

Recor ds/Rows: A collection of multiple related fields that can beRecor ds/Rows: A collection of multiple related fields that can betreated as a unit.treated as a unit.

File: A collection of logically related multiple recor ds.File: A collection of logically related multiple recor ds.



DBMSDBMS

A A Database Management SystemDatabase Management System ((DBMSDBMS) is a) is a

sof tware package withsof tware package with computer programs that computer programs that

control the creation, maintenance, and the usecontrol the creation, maintenance, and the use

of aof a databasedatabase

It allows organizations to conveniently developIt allows organizations to conveniently develop

databases for various applications bydatabases for various applications by databasedatabase

administrators (DBAs) and other specialists. administrators (DBAs) and other specialists.

A A database is an integrated collection of datadatabase is an integrated collection of data

recor ds, files, and other database objects. recor ds, files, and other database objects.



Advantages of DBMS Advantages of DBMS

Sharing of data.Sharing of data.

Improvement in data security.Improvement in data security.

Maintenance of data integrity.Maintenance of data integrity.



Data CommunicationData Communication

It is the exchange of data (in form of 0 & 1) It is the exchange of data (in form of 0 & 1)

between two devices vis some form of between two devices vis some form of

t

ran

smission

med

iu

m.t

ran

smission

med

iu

m.



ComponentsComponents

Message: The message is the information that is to beMessage: The message is the information that is to be

communicated. It consist of text, number, pictures, sound, video or communicated. It consist of text, number, pictures, sound, video or

may be combinations of these.may be combinations of these.

Sender: The sender is the device that sends the data message. It Sender: The sender is the device that sends the data message. It

can be computer, telephone etc.can be computer, telephone etc.

Receiver: It is the device that receives the message.Receiver: It is the device that receives the message.

Medium: The transmission medium is the physical path by which aMedium: The transmission medium is the physical path by which a

message travels from sender to receiver . It consists of twisted pair message travels from sender to receiver . It consists of twisted pair

wire, coaxial cable and fiber wire, coaxial cable and fiber --optics cable.optics cable.

Protocol: A set of r ules that gover n data communication. It Protocol: A set of r ules that gover n data communication. It represents an agreement between the communicating device. represents an agreement between the communicating device.

Without a protocol, two devices may be connected but not Without a protocol, two devices may be connected but not

communicate.communicate.



Process of Data CommunicationProcess of Data Communication



Network TerminologyNetwork Terminology

Network: A network is a set of device connected byNetwork: A network is a set of device connected bymedia links.media links.

Node: Anything connected to a network, usually aNode: Anything connected to a network, usually acomputer but it could be a printer or a scanner .computer but it could be a printer or a scanner .

Backbone: The main cabling of a network that connectsBackbone: The main cabling of a network that connectsall nodes in network.all nodes in network.

Topology: The term topology refers to the way a networkTopology: The term topology refers to the way a networkis laid out. is laid out.

The six topologies are: Mesh, Star, Tree, Ring, Bus and The six topologies are: Mesh, Star, Tree, Ring, Bus and Hybrid. Hybrid.



Diagrams of TopologyDiagrams of Topology

Mesh :Mesh :

Star:Star:

Tree:Tree:

Ring:Ring:

Bus:Bus:

Hybrid:Hybrid:



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