Using a wireless technology known as Near-field communication (NFC), once activated on the smartphone, allows payments or purchases to be made at select stores.
<h3>What is Near-field communication (NFC)?</h3>
NFC is a set of short-range wireless technologies that typically require a distance of 4 cm or less to initiate a connection.
<h3>Characteristics of Near-field communication (NFC)</h3>
For it to work, it is necessary to place two spiral-type antennas within these close electromagnetic fields.
This technology is built on radio frequency identification, which allows a gadget to send radio waves to another gadget or another tag and trigger a certain action.
The NFC acts on the smartphones just like the RFID chips of the bank cards with which you can make payments or purchases.
Therefore, we can conclude that the NFC allows two devices to exchange data when in close proximity to each other.
The Wi-Fi Protected Access 2 (WPA2) makes some alterations to the encryption algorithm that were used in WPA and WEP to what is known as the Advanced Encryption Standard (AES). This is a 128-bit block cipher considered to be much more difficult to crack than the usual 128-bit TKIP wrapper. However, although WPA2 offers a much more tougher encryption standard, it is important to note that it is not hack proof.
Explanation: Convention is the writing activity with the components like punctuation,grammar,symbols,note etc to make the written content understandable and clear. This feature is used because people can understand the meaning of content read by them without initializing it later.
As soon as the reader finishing the reading the information should be clear in his/her mind so that they don't have to figure it out after reading.Convention enhances the value of reading and learning by it's feature .
