There are two types of secondary memories.
- RAM
- ROM
RAM:
- RAM stands for random access memory .
- It is expandable.
- we can do multiple things in it.
- Its erasable.
ROM
- ROM stands for read only memory.
- It is permanent .
- We can only read in it.
- Its permanent hence not removable.
There are two main types of encryption - <span>symmetric and asymmetric.
Using symmetric encryption, you use a single secret key that is used to both encrypt and decrypt the data. This form of encryption has been used way before computers! Without this key it is very hard to decrypt a message. However, the issue with this is that if you want to send an encrypted message, you also have to send a key to them, and </span>if your somebody unintended intercepts the
key, they can read the message.
What's the solution? Asymmetric cryptography or public key encryption. Asymmetric cryptography uses encryption that splits the key into two
smaller keys. One of the keys is public and one is kept private.
A good metaphor for understanding this is the public key is the lock, and the private key is the key. You can encrypt a message to send to somebody with their public key, locking it, which they can then decrypt, unlock, with their private key. And vice versa. So with this kind of encryption it's very difficult to decrypt a message for anybody but the owner as it's much harder to steal when it doesn't need to leave their computer, but easy to encrypt messages to send to them
Answer:
World Wide Web (WWW)
Explanation:
Popularly referred to as the Web is an information system that comprises of many interconnected web resources and documents. These documents and web resources possess a certain URL (Uniform Resources Locators) such as https://www.brainly.com/ which makes them accessible over the internet.
The <em>HTTP or Hypertext Transfer Protocol</em> is a channel for transferring the resources of the World wide web among users.
In 1989, the World Wide Web was invented by Tim Berners-Lee. He developed the first web browser in 1990.
The World Wide Web has played a fundamental role in the advancement of the information age as it is greatly used by different people around the world to communicate efficiently.
The automated flour mill created by Oliver Evans in the mid-1780’s?
