Computer Network

COMPUTER NETWORK

A COMPUTER NETWORK IS A GROUP OF COMPUTERS LINKED TO EACH OTHER THAT ENABLE COMPUTERS TO COMMUNICATE WITH EACH OTHER COMPUTERS AND SHARE THEIR RESOURCES, DATA AND APPLICATIONS.

COMPUTER NETWORK DIAGRAM

FIRST PUBLIC PACKET-SWSITCH

ARPANET, IN FULL ADVANCED RESEARCH PROJECTS AGENCY NETWORK, EXPERIMENTAL COMPUTER NETWORK THAT WAS THE FORERUNNER OF THE INTERNET. IN 1961THE U.S.

ADVANCED RESEARCH PROJECTS AGENCY NETWORK (ARPANET) WAS THE FIRST PUBLIC PACKET-SWITCHED COMPUTER NETWORK.IT WAS FIRST USED IN 1969.

TYPES OF NETWORK

PAN NETWORK

A PERSONAL AREA NETWORK IS A COMPUTER NETWORK FOR INTERCONNECTING ELECTRONIC DEVICES WITHIN AN INDIVIDUAL PERSON'S WORKSPACE.

A PAN PROVIDES DATA TRANSMISSION AMONG DEVICES SUCH AS COMPUTERS, SMARTPHONES, TABLETS AND PERSONAL DIGITAL ASSISTANTS.

PAN NETWORK RANGE IS 10 METER.

PAN NETWORK FIGURE

LAN NETWORK

A LOCAL AREA NETWORK IS A COLLECTION OF DEVICES CONNECTED TOGETHER IN ONE PHYSICAL LOCATION, SUCH AS AN OFFICE OR HOME BUILDING.

A LAN IS USED TO CONNECT THE COMPUTER AND OTHER NETWORK DEVICES SO THAT THE DEVICE CAN COMMUNICATE WITH EACH OTHER TO SHARE RESOURCES.

LAN NETWORK RANGE IS 1 TO 10 KILO METER.

MAN NETWORK

IT COVERS A LARGE GEOGRAPHICAL AREA BY INTERCONNECTING A DIFFERENT LAN TO FORM A LARGE NETWORK IT HAS A GREATER RANGE THAN A LAN.

WHEN DIFFERENT LOCAL AREA NETWORKS ARE CONNECTED AND INTERCONNECT AND COMMUNICATE WITH EACH OTHER, THEY BECOME A MAN NETWORK.

LAN NETWORK RANGE IS 2 TO 50 KILO METER.

MAN NETWORK FIGURE

WAN NETWORK

A WIDE AREA NETWORK IS A TELECOMMUNICATIONS NETWORK THAT EXTENDS OVER A LARGE GEOGRAPHIC AREA. WIDE AREA NETWORKS ARE OFTEN ESTABLISHED WITH LEASED TELECOMMUNICATION CIRCUITS.

COLLECTION OF DIFFERENT LAN AND DIFFERENT WAN NETWORK.

WAN NETWORK FIGURE

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Comments

BOOTABLE USB

WHO TO MAKE A BOOTABLE USB IN WINDOW 10 WHO TO DOWNLOAD WINDOW 10 ISO IMAGE. FOLLOW THIS VEDIO STEPS. 1. FIRST YOU NEED TO DOWNLOAD A SOFTWARE CALLED RUFUS. THIS SOFTWARE IS A MAXIMUM OF THREE TO FOUR MB. THIS SOFTWARE IS FREE OF COST AND FREE OPEN RESOURCE TOOL BY USING IT YOU WILL MAKE YOUR USB BOOTABLE. THE DOWNLOAD LINK OF THIS SOFTWARE IS GIVEN BELOW. Download Rufus 2. AFTER DOWNLOADING THE SOFTWARE YOU HAVE TO INSTALL THE ISO IMAGE OF WINDOWS 10 ON YOUR PC. THE PROCESS OF DOWNLOADING ISO IMAGE OF WINDOWS 10 IS EXPLAINED IN THIS VIDEO. PLEASE WATCH THIS VIDEO CAREFULLY. 3. AFTER DOWNLOADING THIS WINDOW 10 ISO IMAGE FILE YOU HAVE TO ATTACH THE USB TO YOUR PC AND THEN OPEN THE SOFTWARE BY DOUBLE CLICKING AND ALLOW SOME PERMISSIONS. 3. WHEN SOFTWARE IS OPEN YOUR USB NAME IS SHOW IN DEVICE BOX. 4. WHEN YOUR DEVICE IS SHOWN, THEN YOU HAVE TO CLICK ON THE SECOND OPTION I.E. BELOW THE BOOT SELECTION WHICH IS ON THE SIDE OF OPTION SELECT. AFTER CLICKING, YOU HAVE TO...

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DOS AND DDOS ATTACK

A Dos (Denial-Of-Service) Attack and A DDOS (Distributed Denial-Of-Service) Attack Are Both Attempts to Make a Computer System or Network Resource Unavailable to Legitimate Users. However, They Differ in How They Achieve This: Dos Attack: Imagine A Single Person Throwing Rocks at A Castle Gate. A This Person Represents the Attacker, And the Rocks Represent the Malicious Traffic. The Castle Gate Represents the Target System or Network Resource. The Attacker Keeps Throwing Rocks, Trying to Overwhelm the Gate's Defenses and Gain Entry. Dos Attacks Are Typically Launched from A Single System. They Can Be Effective Against Small Systems or Networks, But Larger Systems Can Often Withstand Them. DDos Attack: Imagine An Army Throwing Rocks at A Castle Gate. This Army Represents the Attacker, And the Rocks Represent the Malicious Traffic. The Castle Gate Represents the Target System or Network Resource. The Attackers Coordinate Their Attack, Throwing Rocks from Multiple Directions at Once. ...

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