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Link

                 A link can be defined as a web address that is used to make connectivity between web pages.
                 Hyperlink

                 A hyperlink is simply a part of the Web page that is linked to a URL. A hyperlink can appear
                 as text, an image, or a navigational tool such as a button or an arrow. When you click on a
                 hyperlink, you will jump to the URL specified by the hyperlink. Hyperlinked text usually looks
                 different from normal text in a Web page. It is often underlined, but can be formatted in a

                 number of ways.
                 Bandwidth

                 The capability of a transmission medium to transmit the maximum amount of data from one
                 computer to another over a computer network in a given amount of time is called bandwidth.
                 A bandwidth is generally in bits per second (bps) or Bytes per second (Bps), Kilobytes per second
                 (Kbps) and Megabytes per second (Mbps). There can be various types of bandwidths which are
                 network bandwidth, data bandwidth or digital bandwidth.

                  i +  DEVICES REQUIRED FOR A NETWORK


                 There are various types of devices such as Network Interface Card (NIC), Hub,
                 Switch, Router, Modem, Network Cable and Gateway. Let us discuss about
                 these in detail.
                 Network Interface Card (NIC)


                 The NIC joins a computer to a network and allows it to communicate with other
                 computers on the network.

                                             Hub                                                            NIC

                                            A hub is  a networking  device that allows us  to connect multiple
                                            computers to a single network. A hub works on the physical layer.
                       Hub or Switch        It takes the input data  from one of the ports and  broadcasts  the
                 information to all other ports connected to the network. It has no decision-making capability, so
                 it's a non-intelligent device. Only one transmission takes place on a network at a particular time.
                 Swtich

                 A switch has a decision-making capacity, so it is called an intelligent device that works in the
                 data link layer. It has knowledge of the machine and addresses of the ports in the network. A
                 switch is a secure device that establishes a link between the sender and the receiver, based on
                 the machine addresses to transmit information.
                 Router


                 A Router is used when multiple devices need to connect to the Internet
                 using the  same IP.  It  works  on  the  network  layer.  In other  words,  it
                 is used to connect and facilitate transfer of information between two
                 networks.                                                                             Router


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