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Cybersecurity Interview Questions And Answers
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- CRYPTOGRAPHY AND NETWORK SECURITY
Cybersecurity Interview Questions And Answers
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Cybersecurity Interview Questions And AnswersWhat is cryptography? ✔️Ans - the practice or securing information and
communication to protect the data from third parties (who the data is not
intended for)
What is the difference between symmetric and asymmetric encryption?
✔️Ans - Symmetric encryption uses the same key for both encryption and
decryption, it is fast (but more vulnerable), and is used for bulk data
transmission. Asymmetric encryption uses different keys for encryption
and decryption which makes it slower due to higher computation, and is
used for securely exchanging secret keys.
Some examples of Symmetric algorithms are DES, 3DES, AES, and RC4.
Asymmetric algorithms are RSA and Diffie-Hellman
Explain the CIA triad ✔️Ans - CIA stands for Confidentiality, Integrity,
and Availability. It is a very popular model used to guide policies for
information security.
Confidentiality - The information should only be accessible to authorized
personnel. Information should be strongly encrypted to make unauthorized
access difficult to decipher the data
Integrity - Makes sured the data has not been modified by unauthorized
individuals. Integrity ensures that data is not corrupted and is reverted
back to the individual original data in case of modification by unauthorized
individuals. **guarantees the data sent is the same as the data received**
Availability - The data should be readily available to the user when
required. This means maintaining hardware, upgrading systems regularly,
backing up data, and promptly recovering data.
What is the difference between IDS and IPS? ✔️Ans - IDS (intrusion
detection system) only detects intrusions and the administrator has to
prevent intrusions. IPS (intrusion protection system) detects intrusions
and takes action to prevent intrusions.
, How is encryption different from hashing? ✔️Ans - Both encryption and
hashing are used to convert readable data into an unreadable format.
Encrypted data can be reverted back to the original format while hashing
can be cracked but not reverted back to the original data as in encryption.
What is a firewall and why is it used? How do you set one up etc ✔️Ans -
A firewall is a network security system on the boundaries of the network
that monitors and controls traffic. Mainly used to protect the network from
viruses, malware, and worms, but they can also be used to prevent remote
access and content filtering.
How do you set one up?
The difference between a VA(vulnerability assessment) and PT(penetration
test)? ✔️Ans - Vulnerability assessments find flaws on the target.
Penetration testing is the process of finding vulnerabilities on the target.
The organization tests their system as a malicious hacker would to gain
insight into potential vulnerabilities and takes action to remediate the
findings.
What is a three way handshake? ✔️Ans - This is the method of a TCP/IP
network connection between a host and a client. SYN.SYNACK.ACK
SYN - The client sends a sin (synchronize) packet to the server to check if
the server is up or has open ports
SYN ACK - The server sends a SYNACK packet back to the client if the server
has open ports
ACK - the client acknowledges this and sends an ACK packet back to the
server
What are the response codes that can be received from a web application?
✔️Ans - 1xx informational responses
2xx success
3xx redirection
4xx client side error
5xx server side error
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