NETWORK FUNDAMENTALS

WHAT IS A NETWORK?

ITS JUST A ROAD OR A PATH FOR OUR JOURNEY 

We already talk about the basic things about the communication system so its more than enough so lets move on to NETWORKING,Network is nothing but the group of computers interconnected with each other for sending and receiving data in the form of packets

Let us take a simple example then u should understand clearly , A Messenger;One fine day The postman delivering letters,he delivers letter on various places actually he travels one place to other for the delivery so from that example the letters denote the data the path or the direction the messenger should move on is called as Network

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Actually its an massive network don’t worry its just for an example in this above diagram it was the real-time network widely used for this kind of massive network they using many protocols for the transmission of packets,Routing,Switching,Security etc…. after all that the Network is fulfilled.we will see detail view of these things on the upcoming posts

HOW DO COMPUTERS CONNECTED PHYSICALLY?

CONNECTIVITY THROUGH TAIL

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The computers are connected physically through cables,The CAT-5 or widely known as RJ45 which had 08-tiny cables wound inside then this type of cable should be connected to NIC(NETWORK INTERFACE CARD) otherwise called as RJ45 port.by this method computers and networking elements are connected.

WHY WE BUILD A NETWORK INSIDE A OFFICE?(LAN)

ABOUT EACH OTHER INSTEAD OF TALK TO EACH OTHER 

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The above image is a LAN(Local Area Network) we go for LAN for two main reasons one is for communicating all the computers for data sharing and other reason is for reduce the Machine cost                                                                                                                                            From the above picture there is one printer is connected in a network and that printer is accessing by all the computers.Then assume if there is no-network connection is available The organisation need to buy more printers and its quiet expensive,so LAN is always preferable

HOW TO BUILD A NETWORK BETWEEN TWO ORGANISATION?

THROUGH FIBRE TAILS

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There are two possibilities to connect the two organisation one is through private cable and other one is ISP(INTERNET SERVICE PROVIDER),The private network is always not preferable because the organisation should connect their subordinates by lay cables between organisations and it will be more expensive.The second method is widely used by the most of the organisation,the ISP should take care of all the connection and u should pay some amount for them.The operation is so simple a socket is mount on the wall u just connect the RJ45 cable from the Router or Switch  to the socket.It will Redirect the connection to the other end or to the subordinates then the connection between the two organisation have been established

HOW THE BROWSERS AND APPLICATIONS WORK ON INTERNET?

GO AND SEARCH THAT BOOK IN THE BOOKSHELF 

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Most of the people having the this doubt how the applications are working instantly very fast and without any error message,let us take one example,Me and my friends go to a bookstore for buy two different books i need a Investor-2020 book and my friend need sci-fix book the shopkeeper search  Investor-2020 book in the BUSINESS SECTION and sci-fix book in the General-science section.                                                                                                   The same-thing is happening here also the HTTP request is sent from the browser then the request reach the server and the information relevant to the request is processed

SPEED,DELAY,AVAILABILITY

WHAT IS THE DIFFERENCE BETWEEN SPEED AND DATA?

RUN FASTER…..      

I see most of the People they couldn’t understand the difference between BITS AND BYTES this only differentiate the speed and data “The speed should be denoted by BITS”   and “The data should be denoted as bytes”                                                                                     1-Kb=ONE KILO BIT;  1-KB=ONE KILO BYTE (case sensitive)                                                                                REPRESENTATION:  BIT(b);BYTE(B)                                                                                                                             SPEED…………………………………………………………………………………………….DATA                        1024 BIT=1-Kb                                                                                         1024 BYTE=1-KB                  1024 (Kb)=1-Mb                                                                                       1024 (KB) =1-MB                  1024 (Mb)=1-Gb                                                                                       1024 (MB)=1-GB

WHY DELAY IS TAKE PLACE IN A NETWORK?

HEY WHY YOU CAME LATE?

The delay is take-place in a network is due to the data traffic,the data traffic is nothing but the more number of users accessing particular server or a particular link,because of the data traffic the delivery and reception of the packets were taken more time.It will rectify by adding more bandwidth to the link or increasing the server capacity

WHAT IS NETWORK TOPOLOGY?

Screenshot_2017-06-15-20-57-57The network topology is classified into 4 types they are STAR,BUS,RING,MESH and HYBRID from these typologies every topology having some unique feature such as let us take STAR topology in this topology every computer is connected to a switch if one connection fails only that computer only fails,other computers are working properly. let us take RING topology in this each computer connects with other computer like a ring if one computer fails it will find route through next computer connected .The FULL-MESH topology is used widely by most of the ISP because each and every node connected to other nodes in the network,if one fails it will automatically terminates the flow of packets.

Images source :Net-King

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