Cyber Security Jobs Network Security Fundamentals 1 — Questions and Answers
Question 1: What does a firewall primarily do in a network security context?
- Filters incoming and outgoing traffic based on defined rules (Correct answer)
- Encrypts hard drive data at rest
- Backs up files to the cloud
- Manages user account passwords
Correct answer: Filters incoming and outgoing traffic based on defined rules
A firewall monitors and controls network traffic according to security rules to block unauthorized access.
Question 2: What is a DMZ in network architecture?
- A subnetwork that exposes external-facing services while isolating the internal network (Correct answer)
- A type of encryption algorithm
- A malware category
- A password policy standard
Correct answer: A subnetwork that exposes external-facing services while isolating the internal network
A DMZ (Demilitarized Zone) is a perimeter network that hosts public-facing services like web servers, separated from the internal network.
Question 3: Which protocol is used to securely transfer files over a network, replacing plain FTP?
- SFTP (Correct answer)
- HTTP
- Telnet
- SNMP
Correct answer: SFTP
SFTP (SSH File Transfer Protocol) encrypts both commands and data, making it the secure replacement for legacy FTP.
Question 4: What is a VPN primarily used for in a corporate environment?
- Encrypting remote connections to protect data in transit (Correct answer)
- Speeding up internet browsing
- Blocking social media websites
- Generating digital certificates
Correct answer: Encrypting remote connections to protect data in transit
A VPN (Virtual Private Network) creates an encrypted tunnel for remote users to securely access corporate resources.
Question 5: What does IDS stand for in network security?
- Intrusion Detection System (Correct answer)
- Internet Data Storage
- Internal DNS Server
- Integrated Decryption Suite
Correct answer: Intrusion Detection System
An IDS (Intrusion Detection System) monitors network traffic and alerts administrators to suspicious or malicious activity.
Question 6: Which OSI layer does a WAF (Web Application Firewall) operate on?
- Layer 7 (Application) (Correct answer)
- Layer 1 (Physical)
- Layer 3 (Network)
- Layer 4 (Transport)
Correct answer: Layer 7 (Application)
A WAF operates at OSI Layer 7, inspecting HTTP/HTTPS traffic to block application-layer attacks like SQL injection and XSS.
Cyber Security Jobs Network Security Fundamentals 1
What does a firewall primarily do in a network security context?