Cyber Security Network Security 1 — Questions and Answers
Question 1: Which protocol provides encryption for data transmitted over a network by operating at the transport layer?
- TLS (Correct answer)
- FTP
- HTTP
- SNMP
Correct answer: TLS
TLS (Transport Layer Security) encrypts data at the transport layer to protect it in transit.
Question 2: What type of firewall inspects the state of active connections and makes decisions based on connection context?
- Packet filter
- Stateful inspection (Correct answer)
- Application proxy
- Circuit-level gateway
Correct answer: Stateful inspection
Stateful inspection firewalls track active connection states to allow or block traffic based on context.
Question 3: Which attack involves an adversary positioning themselves between two communicating parties to intercept traffic?
- Replay attack
- Man-in-the-Middle (MitM) (Correct answer)
- Smurf attack
- Teardrop attack
Correct answer: Man-in-the-Middle (MitM)
A Man-in-the-Middle attack intercepts communications between two parties without their knowledge.
Question 4: What is the primary purpose of a DMZ (Demilitarized Zone) in network architecture?
- Store encrypted backups
- Host public-facing services while isolating the internal network (Correct answer)
- Monitor employee activity
- Provide VPN access to remote users
Correct answer: Host public-facing services while isolating the internal network
A DMZ isolates public-facing servers from the internal network, reducing the attack surface.
Question 5: Which port is used by default for HTTPS traffic?
- 80
- 443 (Correct answer)
- 8080
- 22
Correct answer: 443
HTTPS uses port 443 by default for encrypted web communication.
Question 6: What does a network IDS (Intrusion Detection System) primarily do?
- Block malicious traffic automatically
- Monitor and alert on suspicious network activity (Correct answer)
- Encrypt network communications
- Manage firewall rules
Correct answer: Monitor and alert on suspicious network activity
An IDS monitors network traffic for suspicious activity and generates alerts but does not block traffic.
Cyber Security Network Security 1
Which protocol provides encryption for data transmitted over a network by operating at the transport layer?