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Information Security Engineer Practical Test - Problem Solving Focus Part 2 Network Security

You can effectively study the contents of the Information Security Engineer practical exam questions and obtain the Information Security Engineer practical qualification.

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Engineer information security
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What you will learn!

  • Network Security

  • Information Security Engineer Practical Exam Questions

Obtain the National Technical Qualification Information Security Engineer 🔐

The Information Security Engineer (IS) certification is a national qualification exam administered by the Ministry of Science and ICT (MSIT) and the Korea Communications Commission (KCCA). Based on theoretical and practical knowledge of IT and information and communications technology, candidates are required to develop information security systems and solutions; operate and manage major operating systems, network equipment, and information security devices; formulate and manage organizational information security policies and countermeasures; and apply information protection-related laws and regulations . This qualification exam verifies expertise in digital asset protection through risk assessment, threat detection, and mitigation strategies.

Lecture Features

This course delves deeply into the theory and practical problems of the Information Security Engineer practical exam, focusing on questions with a high hit rate on the actual exam. The course facilitates understanding through practical examples and emphasizes security techniques that students can apply in real-world settings. Furthermore, to enhance learner understanding, each topic is presented with detailed explanations and a hands-on approach.

Lecture Curriculum

  • Network Security (Nos. 43-49): Understand the OSI 7-layer model, compare it to TCP/IP, and learn about data encapsulation.

  • Network Security (No. 50): Understand the functions of various network security devices.

  • Network Security (No. 51-55): Understand network security concepts and protocols such as CSMA-CD, CSMA-CA, TCP control flags, port numbers, and IP fragmentation.

  • Network Security (Nos. 56-60): Understand the concepts of network security protocols such as ARP and RARP.


  • Network Security (Nos. 61-62): Understand the range of IP address classes and the concepts of CIDR, subnetting, and supernetting.

  • Network Security (Questions 63-69): Understand routing, network topology, wireless LAN security, and network security measures.

  • Network Security (70-73): Understand packet filtering firewalls, fragmentation attacks, and stateful packet inspection firewalls.


  • Network Security (Nos. 74-79): Understand the types and roles of IDS, IPS, and ESM, as well as the features and usage of open source security solutions.

  • Network Security (80-89): Understand how SNMP works, SNMP version 3 fields, ICMP protocol, DoS/DDoS attacks, reflection attacks, and UDP flooding.


  • Network Security (Questions 90-99): Understand various network security attacks and countermeasures.

  • Network Security (100-109): Identify and describe various network security attacks and their corresponding defense mechanisms.

  • Network Security (110-120): Understand various network security attacks and countermeasures.

  • Network Security (121-123): Understand various network security attacks and how to prevent them.

  • Network Security (124-126): Understand how to prevent various network security attacks.

  • Network Security (Nos. 127-133): Identify and analyze various network security attacks and corresponding countermeasures.

  • Network Security (Nos. 134-136): Understand various hacking methods such as phishing, pharming, and smishing, and learn how to prevent and respond to attacks.

  • Network Security (137-143): Understand network security concepts and technologies and practice solving real-world problems.

Expected effects after learning

This course will help you gain a comprehensive understanding of network security. It will also help you develop practical problem-solving skills to prepare for the Information Security Engineer practical exam. By acquiring practical knowledge and skills in the network security field, you will be able to advance your career.

Recommended for
these people

Who is this course right for?

  • Those who have passed the written exam for the Information Security Engineer and are preparing for the practical exam

  • A non-major but interested in information security

  • Those who wish to obtain the Information Security Engineer qualification

Need to know before starting?

  • Passed the Information Security Engineer Written Exam

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18 lectures ∙ (8hr 38min)

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