1.8.3 Check Your Understanding – Network Security

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1. Which attack slows down or crashes equipment and programs?

Firewall
Virus, worm, or Trojan horse
Zero-day or Zero-hour
Virtual Private Network (VPN)
Denial of Service (DoS) ✅

Explanation: A DoS attack slows down or crashes network equipment and programs.

2. Which option creates a secure connection for remote workers?

Firewall
Virus, worm, or Trojan horse
Zero-day or Zero-hour
Virtual Private Network (VPN) ✅
Denial of Service (DoS)

Explanation: A VPN creates a secure connection for remote workers.

3. Which option blocks unauthorized access to your network?

Firewall ✅
Virus, worm, or Trojan horse
Zero-day or Zero-hour
Virtual Private Network (VPN)
Denial of Service (DoS)

Explanation: A firewall blocks unauthorized access to a network.

4. Which option describes a network attack that occurs on the first day a vulnerability becomes known?

Firewall
Virus, worm, or Trojan horse
Zero-day or Zero-hour ✅
Virtual Private Network (VPN)
Denial of Service (DoS)

Explanation: A zero-day or zero-hour attack occurs when a vulnerability is newly discovered and a solution is not yet available.

5. Which option describes malicious code running on user devices?

Firewall
Virus, worm, or Trojan horse ✅
Zero-day or Zero-hour
Virtual Private Network (VPN)
Denial of Service (DoS)

Explanation: Viruses, worms, and Trojan horses are types of malicious code that can run on user devices.

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CCNA: Introduction to Networks

Module 1: Networking Today

1.8.3 Check Your Understanding – Network Security

1. Which attack slows down or crashes equipment and programs?

2. Which option creates a secure connection for remote workers?

3. Which option blocks unauthorized access to your network?

4. Which option describes a network attack that occurs on the first day a vulnerability becomes known?

5. Which option describes malicious code running on user devices?

Hassan Abdullah

CCNA: Introduction to Networks

Module 1: Networking Today

1.2.6 Check Your Understanding – Network Components

1.3.3 Check Your Understanding – Network Representations and Topologies

1.4.5 Check Your Understanding – Common Types of Networks

1.6.6 Check Your Understanding – Reliable Networks

1.7.10 Check Your Understanding – Network Trends

1.8.3 Check Your Understanding – Network Security

1.10.2 Module Quiz – Networking Today (Answers)

Module 2: Basic Switch and End Device Configuration

2.1.6 Check Your Understanding – Cisco IOS Access Answers

2.2.8 Check Your Understanding – IOS Navigation Answers

2.4.8 Check Your Understanding – Basic Device Configuration Answers

2.6.3 Check Your Understanding – Ports and Addresses Answers

2.9.4 Module Quiz – Basic Switch and End Device Configuration Answers

Module 3: Protocols and Models

3.1.12 Check Your Understanding – The Rules Answers

3.2.4 Check Your Understanding – Protocols Answers

3.3.6 Check Your Understanding – Protocol Suites Answers

3.4.5 Check Your Understanding – Standards Organizations Answers

3.6.6 Check Your Understanding – Data Encapsulation Answers

3.7.11 Check Your Understanding – Data Access Answers

3.8.2 Module Quiz – Protocols and Models (Answers)

Checkpoint Exam: Basic Network Connectivity and Communications Exam Answers

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1.8.3 Check Your Understanding – Network Security

1. Which attack slows down or crashes equipment and programs?

2. Which option creates a secure connection for remote workers?

3. Which option blocks unauthorized access to your network?

4. Which option describes a network attack that occurs on the first day a vulnerability becomes known?

5. Which option describes malicious code running on user devices?

Hassan Abdullah

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