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All Journal NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Journal of Education and Teaching Learning Global Abdimas: Jurnal Pengabdian Masyarakat Pedagogy : Jurnal Pendidikan Matematika Jurnal Abdi Mandala JURNAL ILMIAH SAINS TEKNOLOGI DAN INFORMASI Amal Ilmiah: Jurnal Pengabdian Kepada Masyarakat Jurnal Tadris Matematika (JTMT) Jejak digital: Jurnal Ilmiah Multidisiplin
Ketrin Rinayanti Manullang
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Automotive Engineering Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Languange, Linguistic, Communication & Media Library & Information Science Mathematics Public Health Social Sciences Transportation Other

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Pengenalan Struktur Data dan Perannya  dalam Pemrograman Satriani Satriani; Dewi Andriany; Rusmawati Rusmawati; Mima Mima; Masnur Masnur; Salwana S; Ketrin Rinayanti Manullang
Jejak digital: Jurnal Ilmiah Multidisiplin Vol. 2 No. 3 (2026): MEI 2026
Publisher : INDO PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63822/x1en1t53

Abstract

Data structures are one of the most important foundations of computer science, defining how information is stored, organized, and manipulated within a computing system. Without a proper understanding of data structures, a software developer will struggle to design efficient, scalable, and reliable systems. This article aims to provide a comprehensive overview of the fundamental concepts of data structures and their crucial role in modern programming practice. It covers various types of data structures—from linear structures such as arrays, linked lists, stacks, and queues to non-linear structures such as trees, graphs, and hash tables—and discusses criteria for selecting an appropriate data structure based on the problem context. The method used is a systematic literature review of relevant scientific publications, technical reports, and official documentation from 2026 onward. The results of the study indicate that selecting an appropriate data structure directly affects the time and space complexity of an algorithm, which ultimately impacts the overall performance of a software system. Furthermore, this article also identifies several gaps in the literature related to the teaching of data structures in academic settings, particularly in Indonesia. It is hoped that this article will serve as a useful academic reference for students, researchers, and practitioners in the fields of information technology and software engineering.
Penting Struktur Data Tree dalam Mengelolah Data Komputer Intan Sahyuni; Aura Chintiya Bella; Muhammad Rijal; Syaira Ramadhani; Eksyel Bongga Upa'; Suci Dian Azzahra; Ketrin Rinayanti Manullang
Jejak digital: Jurnal Ilmiah Multidisiplin Vol. 2 No. 4 (2026): JUNI-JULI
Publisher : INDO PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63822/qp33pp54

Abstract

The rapid development of information technology has increased the need for efficient and structured data management. Large amounts of data require systems that can organize, process, and access information quickly and accurately. One of the most widely used solutions in computer science is the tree data structure. This structure organizes data hierarchically, making searching, inserting, and deleting processes more efficient. This study aims to analyze the importance of tree data structures in managing computer data and compare their performance with other data structures such as arrays and linked lists. The research method used is a quantitative approach with descriptive-experimental methods through simulations of several data structures using different data sizes. The results show that binary search trees provide faster search performance compared to linear data structures, especially for large datasets. In addition, tree structures are highly effective for managing hierarchical data such as file systems and databases. Therefore, tree data structures are considered an important component in improving the efficiency of modern computer data management.
Implementasi Hak Akses User dalam Mencegah Kebocoran Data Jaringan Intan Sahyuni; Aura Chintiya Bella; Muhammad Rijal; Syaira Ramadhani; Eksyel Bongga Upa’; Suci Dian Azzahra; Ketrin Rinayanti Manullang
Jejak digital: Jurnal Ilmiah Multidisiplin Vol. 2 No. 4 (2026): JUNI-JULI
Publisher : INDO PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63822/f98cap10

Abstract

Network security has become an important issue in the digital era due to the increasing use of data-based systems in various sectors. Many organizations store important information within computer networks, causing the risk of data leakage to increase significantly. One of the main causes of data leakage is poor user access management. This study aims to analyze the implementation of user access rights in preventing network data leakage through the application of Role-Based Access Control (RBAC) and Network Access Control (NAC). The research method used is a quantitative approach with descriptive-analytical methods and network system simulations. Research data were obtained through user access testing and network activity analysis. The results show that the implementation of RBAC can limit user access according to their duties and responsibilities, thereby reducing the risk of data misuse. In addition, the use of NAC helps the system validate devices that are allowed to access the network. The combination of these two methods has proven effective in improving network security and reducing the risk of data leakage significantly.
Studi Komparatif Efisiensi Memori antara Struktur Data Array dan Linked List Ummi Rufaidah Hamka; Nurul Syafirah; Muh. Aprian Naufal; Asipa Febriana; Nurjannah Nurjannah; Nurpadila Nurpadila; Ketrin Rinayanti Manullang
Jejak digital: Jurnal Ilmiah Multidisiplin Vol. 2 No. 4 (2026): JUNI-JULI
Publisher : INDO PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63822/wbzdgx50

Abstract

The selection of linear data structures directly impacts memory efficiency and software performance. This study conducts a profound comparative analysis between arrays and linked lists using a quantitative experimental approach. Benchmarking was performed across sequential access, random access, insertion, and deletion scenarios using C++ and Python with dataset sizes from 103 to 107 elements. Memory consumption was tracked via Valgrind Massif and the tracemalloc library. In C++, arrays consistently outperform linked lists in sequential access with a 3.2× speedup on 106 elements due to optimal CPU cache locality. Conversely, for middle insertions, linked lists show a dramatic advantage with a constant time of ~50ns, compared to 2.3ms for arrays (46,000× slower). Regarding memory for primitive data, singly linked lists incur a 200% pointer overhead and doubly linked lists 400% on 64-bit systems. This research concludes that arrays serve as the best default for intensive computation, while linked lists are recommended for dynamic data manipulation.
Analisis Efektivitas Protokol Autentikasi Jaringan Nirkabel Berdasarkan Parameter (QoS) Ummi Rufaidah Hamka; Nurul Syafirah; Muh. Aprian Naufal; Asipa Febriana; Nurpadila Nurpadila; Nurjannah Nurjannah; Ketrin Rinayanti Manullang
Jejak digital: Jurnal Ilmiah Multidisiplin Vol. 2 No. 4 (2026): JUNI-JULI
Publisher : INDO PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63822/1wymms59

Abstract

The need for wireless networks (Wi-Fi) in academic environments such as the University of West Sulawesi continues to increase along with the increasing number of users. However, the surge of connected devices without access control burdens the Access Point, resulting in a decrease in service quality such as unstable connections and high data delivery failures. This study aims to analyze the effectiveness of implementing a wireless network authentication protocol based on Quality of Service (QoS) parameters using the Telecommunications and Internet Protocol Harmonization Over Network (TIPHON) standard. The method used is Action Research by monitoring and processing Wi-Fi network traffic data using Wireshark software in two different locations, namely Building A (without an authentication system) and the Library (with an authentication system). The QoS parameters tested include throughput, packet loss, delay, and jitter. The results show that both locations have an average QoS index of 2.25 (Moderate Category). Building A boasts superior throughput of 466 Kbps, but its delay (157.1 ms) and jitter (42.06 ms) performance are less stable, with packet loss reaching 85.17% due to the density of freely connected external devices. In contrast, the Library, which implemented an authentication system, had significantly superior network stability, with a highly responsive delay of 9.54 ms (Excellent) and jitter of 4.51 ms (Good), despite its lower throughput capacity of 144 Kbps. This study concludes that implementing an authentication system is a fundamental requirement for limiting the number of unauthorized users, preventing traffic congestion, and maintaining stable network service quality on campus.
Pengaruh Pemilihan Topologi Jaringan Star Terhadap Performa Jaringan Pada Komputer Sitti Hadra; Nabila Nabila; Firta Dewi; Ketrin Rinayanti Manullang; Dewi Suci
JURNAL ILMIAH SAINS TEKNOLOGI DAN INFORMASI Vol. 4 No. 2 (2026): April : Jurnal Ilmiah Sains Teknologi dan Informasi
Publisher : CV. ALIM'SPUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59024/jiti.v4i2.1745

Abstract

Penelitian ini menganalisis pengaruh topologi star terhadap performa jaringan komputer di era digital, di mana akses internet Indonesia mencapai 72,78% menurut BPS (2024), menuntut infrastruktur andal dan efisien. Tujuan utama adalah mengevaluasi keunggulan seperti kemudahan pemeliharaan, performa stabil, serta keamanan terpusat, sekaligus keterbatasan kritis berupa single point of failure, biaya kabel tinggi, dan skalabilitas terbatas, dengan mitigasi melalui protokol redundansi FHRP. Metode yang digunakan adalah studi kepustakaan digital melalui analisis literatur dari jurnal, e-book, dan sumber daring. Hasil menunjukkan topologi star unggul untuk LAN skala kecil-menengah dengan throughput tinggi dan deteksi kesalahan mudah, meskipun rentan kegagalan pusat; integrasi FHRP berhasil meminimalkan downtime di bawah 1% serta mencapai uptime 99,9%. Secara keseluruhan, topologi star dikombinasikan redundansi menjadi solusi optimal untuk lingkungan enterprise modern, dengan saran penggunaan switch stackable, monitoring SNMP, dan VLAN untuk meningkatkan skalabilitas serta keamanan.
Analisis Perkembangan Teknologi Jaringan 5g Dan Dampaknya Terhadap Komunikasi Digital Sitti Hadra; Nabila Nabila; Dewi Suci; Firta Dewi; Ketrin Rinayanti Manullang
JURNAL ILMIAH SAINS TEKNOLOGI DAN INFORMASI Vol. 4 No. 2 (2026): April : Jurnal Ilmiah Sains Teknologi dan Informasi
Publisher : CV. ALIM'SPUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59024/jiti.v4i2.1746

Abstract

Jaringan 5G, sebagai generasi kelima teknologi seluler, menyediakan kecepatan internet ultratinggi, latensi minimal, dan konektivitas superior dibandingkan pendahulunya. Penelitian ini bertujuan mengkaji evolusi, manfaat, serta hambatan implementasi 5G dalam berbagai domain kehidupan. Pendekatan metodologis yang diterapkan adalah studi pustaka (Library Research) dengan pengumpulan data dari literatur primer seperti buku, jurnal ilmiah, dan artikel peer-reviewed. Temuan penelitian mengindikasikan bahwa 5G menghasilkan dampak transformasional positif pada pendidikan (VRlearning), kesehatan (telesurgery), industri (Industry4.0), transportasi (V2X), dan smart city ecosystems. Meski demikian, deployasi 5G terkendala oleh biaya infrastruktur masif, keterbatasan device ecosystem, serta vulnerabilitas keamanan siber. Rekomendasi: Diperlukan integrasi advanced security frameworks dan dukungan infrastruktur policy-driven untuk optimalisasi adopsi dan sustainability jaringan 5G.
Co-Authors Ade Irma Amaliyah AR, Rezki Amara, Rutni Amin, Nursafitri Amran Yahya Anaguna, Nursyam Andi Marshanawiah Andika Andika Anisa Anisa arniati, arniati Asipa Febriana Aura Chintiya Bella Dewi Andriany Dewi Suci Eksyel Bongga Upa' Eksyel Bongga Upa’ Firta Dewi Hutapea, Bilferi Intan Sahyuni Irmawati Irmawati Masnur Masnur Mila Sari Mima Mima Muh. Aprian Naufal Muhammad Rijal Mukarrama, Mukarrama Nabila Nabila Nadhiyya, Asa Nenny Indrawati, Nenny Nurhaeni Nurhaeni Nurhikma Ramadhana Nurjannah Nurjannah Nurpadila Nurpadila Nursyam Anaguna Nurul Syafirah Purwantyono, Bambang Reski Ulan Dari Rusmawati Rusmawati Salwana S Satriani Satriani Sitti Hadra Sitti Inaya Masrura Suci Dian Azzahra Suci Rama Dani Suci Ramadani Syaira Ramadhani Syerli, Syerli Ummi Rufaidah Hamka