Engineer Information Communications
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ExploreAbout this exam
The Engineer Information Communications (정보통신기사) is a Korean national technical certification for engineers who design, build, and operate communication systems and networks. Candidates typically work in telecom carriers, network integration, broadcasting and transmission, or public-sector IT, and many take it to strengthen a technical portfolio or satisfy employer requirements. The exam is delivered in Korean and blends multiple-choice items with written short-answer work, so it rewards both recall and the ability to explain calculations and design choices clearly. Content spans information and communication systems, network protocols, wireless and mobile communications, optical and transmission systems, information security, software and programming, and communication law and standards. Preparation should be built around the official scope published by the administering body, not around rumor. Work through each domain systematically, solve calculation problems by hand until units and formulas are automatic, and practice writing short answers that show your reasoning rather than only a final number. Current administrative details such as question counts, time limits, fees, and passing criteria change and are published by the official body; confirm them there before you register. This page is independent study material and is not affiliated with or endorsed by any examining authority.
What you'll study
About Engineer Information Communications preparation
What does the exam actually test?
It tests engineering fundamentals across communication systems, network protocols, wireless and mobile, optical transmission, security, software, and communication law. Expect a mix of conceptual multiple-choice items and written problems where you must show formulas, units, and reasoning, not just a final value.
How many questions and how long is the exam?
Those figures are set by the administering body and can change between exam cycles, so no fixed number is reliable. Check the official announcement for the current question count, time limit, and subject structure before you plan your pacing strategy.
How hard is it compared with other Korean technical certifications?
Difficulty is moderate to high for candidates without hands-on network or transmission experience. The written section is the usual differentiator: many candidates know the concepts but lose points because they cannot present calculations and short explanations cleanly under time pressure.
Can I retake it if I fail?
Retake rules, waiting periods, and any limits on attempts are set by the administering body and are not fixed across cycles. Confirm the current policy on the official site before assuming you can re-register for the next scheduled exam.
What is the passing score?
The passing criteria are published by the official body and may differ between the multiple-choice and written portions. Do not rely on numbers from forums or older study guides; verify the current threshold on the official announcement for your exam cycle.
In what order should I study the domains?
Start with information and communication systems and network protocols, since later domains assume that vocabulary. Then take wireless and optical transmission, which carry heavy calculation content. Finish with security, software, and law, which are more memorization-based and benefit from short, repeated review near the exam date.
Why do candidates fail the written section?
Common causes are skipping units, writing only a number without the formula, misreading whether a question asks for a ratio in dB or linear form, and running out of time on multi-step link-budget or traffic problems. Practice writing complete answers under a timer rather than only reading solutions.
How much math do I need?
Comfort with logarithms and decibels, basic signal-to-noise calculations, bandwidth and data-rate relationships, and simple probability is enough for most items. You should be able to convert between linear and dB values quickly and keep units consistent through multi-step problems.
Where do I confirm fees and exam dates?
Only the official administering body publishes current fees, schedules, and application windows. This page is independent study material and does not track administrative details, so verify dates and payment on the official site before registering.