Answer: Application layer
Explanation:
Application layer of OSI(Open system interconnection) that is responsible for interfacing the communication with the user by displaying information or message. It maintains the transmission of file and assessment, emailing faculty, using network services etc.
- According to the question,if any Skype user has complain regarding video call drop while conferencing then application is responsible to solve the issue.
- This layer will be the starting point of troubleshoot by approaching to network resources.As call drop can occur due to network service, congestion or resource issue.
Answer:
Explanation:
Radio waves are a part of electromagnetic waves. They are high wavelength and low frequency waves that are classified as non-ionizing radiation. These waves are mostly used for communication purposes.
Radio waves carry are interpreted by devices that converts them to mechanical energy that can be interpreted and easily discerned. These waves carry a broad range of information.
These waves carry time-varying electrical signals that can easily be transmitted and they are produced by accelerated electrical charges.
Answer B: Asymmetric cryptography, because the receiver has its own decryption key and cannot create encrypted messages, because he doesn't have the encryption key.
About the other answers:
A: Private keys are always involved, there has to be some secret to do encryption, so this answer doesn't say very much.
C: Digital signatures can be used to verify/prove some data comes from some person (the signer) in an unaltered way. It is not about encryption, so is not about the security of your message. You use it in combination with encryption.
D: Like A, this doesn't say very much. Shared secret keys (symmetric keys) can be used for encryption, but they are less secure since the keys have to exist in more than one place (sender and receiver).
It happened because the window files on that users pc are corrupted and deleted so the user needs to reinstall the windows and then after he should be able to remove that file from his PC.
If the above thing didn't work, follow the following steps.
- Click the start button ,type in cmd then it will show you a command prompt program icon, right click on that and open it by using the administrator rights. Once the program opened then type in chkdsk /f and hit Enter to automatically scan your computer for any corrupted files/ folders upon the restart of the computer.
This will be definitely helpful for you.
