DESCRIPTION REGARDING
SIGNIFICANCE AND USAGE OF INTERNET,
INTERNET PROTOCOL,HTTP,FTP
IP ADDRESS .......
what is the mean of Internet and how it works:
A global computer networking that providing variety of information and communication facilities
Basically internet is collection of interconnected networks (global system) that uses standard internet protocols(Tcp/ip) suite to serve large number of people on the world wide ...
''Tcp(transfer control protocol)'',
''ip(internet protocol)''.
Internet consists collection of millions of files embedded in server.
Internet carries vast information resources and services like inter-linked hypertext documents(html)
of world wide web and large infrastructure to support electronic(emails) and contents ...
html:
hypertext markup language..
A html is collection of tags of presentational ,structural.
A web page collection of text,graphical content..
Definition of Network:
Interconnection of computers that vshare information like send,receive,remotely connected with each other is called network..
Internet is a network of networks that consists of
millions of private,public,government,commercial networks of local(national) and global scope(international)......that are linked by a large cables (optical network) and electronic devices like hubs,routers ....and large number of servers.
Definition of server:
server is basically a computer program..
that provides services for various computers that are connected on a network.....
OR
SERVER is a computer program that provides services to other computer programs (users) in same computer or other computers....
A computer with server program excutes on it is also referred as server ....
client/server programming model:
A server is a program that awaits(waits for some time) and fulfills the requests from the clients or client programs in the same or else in different computers...
A computer can behave like client which sends requests for services from other programs and also
as a server of requests from other programs....
Definition of web server:
A web server is the computer program that serves requested Html pages or files.
A Web client is the requesting program associated with the user.Normal these clients uses Html requests.... and receive http responses...
The Web browser in your computer is a client that requests HTML files from Web servers....
ex:email note on the web,web page...
Definition Internet protocol(ip):
Ip stands for internet protocol...
Internet protocol(ip) is the method or protocol by which data is being sent from one computer to another computer on the internet....
The task of internet protocol is delivering packets(information)or transferring information of from source to destination....
internet protocol is used to connect to the internet(inter connected network)
In these a device or system is connected based on the ip address...
Definition INTERNET PROTOCOL (IP)ADDRESS:
INTERNET PROTOCOL ADDRESS IS OF TWO VERSIONS :
IP V (INTERNET PROTOCOL VERSION)- 4 (16 BITS).
IP V (INTERNET PROTOCOL VERSION)- 6(32 BITS).
Each computer or device (known to be host on internet) and it will have only single ip address that uniquely identifies it from all the computers ,devices on the internet...
ip address is a numerical label assigned to each device participating in a computer network, that uses the internet protocol for communication.....
ex:modem,routers,COMPUTERS,printers,scanners...
example of ip address:
gmail: 74.350.350.255
normally for routers : 198.162.0.1
EX AMPLE:for websites:172.16.7.8
here in the example
172 -indicates region
16- indicates area
7 -indicates local partition
8 -particular system or unique address
-
MAXIMUM VALUE OF IP ADDRESS IS 255.
EXAMPLE OF IP ADDRESS :172.16.1.1
TYPES OF IP ADDRESS:
what is meant by public ip address:
A public ip address is assigned to every computer that connects on the internet...
IP address is unique from one another...
There cannot be same public ip address of two systems across the internet..
The address scheme that denoted as ip address makes possible to find each other over the internet and exchange information.
These ip address help to make possibility of exchanging information..
The public address do not involve user ip address assignment (no control of user) as it been given by system..
Public address are assigned to the systems internet service provider as soon as it is connected to internet gateway and not by the users....
public ip address :
- Static ip address
- Dynamic ip address
A static public ip address does not change and is used primarily for hosting webpages over the internet..
A Dynamic public ip address is chosen from the list of available address and it will be changed it is connected on the internet....
Most of the computer users will have dynamic public ip address which will goes off when disconnected from the internet resource....
Thus it should be reconnected it get ip...
An ip address is said to be private ip address if it reserved for private networks such As lan(local area network) networks and falls on below specified ranges....
10.0.0.0 – 10.255.255.255 (Total Addresses: 16,777,216)
172.16.0.0 – 172.31.255.255 (Total Addresses: 1,048,576)
192.168.0.0 – 192.168.255.255 (Total Addresses: 65,536)
Private IP addresses :
private ip address are used for numbering the computers in a private network..
private networs may inclkude like schools,home ,business ,LAN in airports and hotels ..
By these ip address it provides possibility of systems communication over a network(internet)....
Devices with private IP addresses cannot connect directly to the Internet.
computers outside the local network cannot connect directly to a device with a private IP address.
It is possible to interconnect two private networks with the help of a router ..
Interconnection of networks using appropriate topologies :
Mesh topology
Ring topology
hybrid topology...these is done by using routers and hubs....
These technique is called network address translation or network conversation.....
If the private network is connected to the Internet (through an Internet connection by internet service provider(ISP)) .Then each computer will be rendered a private IP as well as a public IP.
Private IP is used for communication within the network.
Where as the public IP is used for communication over the Internet.
Most Internet users with a DSL(digital subscriber line)/ADSL(Asymmetric subscriber line) connection will have both a private as well as a public IP.
Dsl modem/adsl modems....
Dsl is a communication medium used to transfer digital information over the telephone lines.....
PSTN(public switched telephone network).....
dsl refers network speed...
To know your private ip: follow the steps:
run->ipconfig
command prompt -> ipconfig..
then you will see ipv 4 address' that is your private ip address...
Most of the cases it will be 192.168.1.2..
private and public ip are always static in nature......
Definition of Ftp(file transfer protocol):
Ftp stands for file transfer protocol
Ftp is used to share the files on the internet(i.e., uploading files and downloading files)..
The type of files we can share are documents ,text files,images,videos,group of files zipped under a particular folder.....
uploading a word document on a computer connected to a network ...such that all computers can access and share it......
Definition of HTTp(hypertext transfer protocol):
Http stands for hyper text transfer protocol ...
http is a system for transmitting and receiving information across the internet..
It's principle is simple request and response procedure that will be on the
medium of internet...
In these information can be sent and exchanged easily,accurately and quickly over the internet.....
clients the persons whose exchange of information is confidential with a server requires need of security concern to protect information from unauthorised access...
So https came to existence https stands for secure hyper text transfer protocol(https)....was developed by netscape corporation to provide authorised access and secured transactions....
Difference between http:// and https:// is added security.
THe 's' stands for secure ..
MOst public,private ,government websites uses https://.
So ensure before entering personal details like credit card number in website that is https that means you have secure mode....your data will be safe.
conclusion:
BY these of all technological advancement in network connections...we are communicate at higher rate and larger distances.....
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