CRT Network Security & Protocols 2

Question 1

Which protocol provides encrypted communication between a web browser and a server?

Accepted Answer

TLS

Answer

TLS (Transport Layer Security) encrypts data in transit between clients and servers, replacing the older SSL protocol.

Question 2

What is the default port number used by HTTPS?

Accepted Answer

443

Answer

HTTPS uses TCP port 443 by default, while plain HTTP uses port 80.

Question 3

What is the primary purpose of a digital certificate issued by a Certificate Authority (CA)?

Accepted Answer

To verify the identity of a website or entity

Answer

Digital certificates bind a public key to an identity, allowing users to verify they are communicating with the legitimate server.

Question 4

Which type of encryption uses two mathematically related keys — one public and one private?

Accepted Answer

Asymmetric encryption

Answer

Asymmetric encryption (e.g., RSA) uses a key pair where data encrypted with one key can only be decrypted by the other.

Question 5

In a man-in-the-middle (MitM) attack, what does the attacker primarily do?

Accepted Answer

Intercepts and potentially alters communication between two parties

Answer

A MitM attacker secretly relays and possibly modifies traffic between two parties who believe they are communicating directly.

(CRT) Certified Retail Tobacconist Practice Test