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This community service project was motivated by the limited technical competency among TIK (Information and Communication Technology) personnel in Semarang Regency schools in designing optimal computer network infrastructure. This situation resulted in slow, unstable, and poorly managed digital learning services within these schools. The main objective of this activity was to enhance the competency of 24 TIK personnel to enable them to design efficient, secure, and professional networks tailored to their schools' needs. The solution provided was hands-on training using the UISP Design Center, a web-based network design platform. The training was conducted face-to-face over two days and covered hierarchical topology, VLAN and QoS management, and practical design simulation. Measurement results demonstrated a significant increase in the participants' cognitive competency, evidenced by the average score rising from 45.2% on the pre-test to 82.5% on the post-test. Participants successfully applied these concepts to produce accurate designs for network topology, logical segmentation, and Bills of Materials (BOM). The high level of participant satisfaction confirms the effectiveness of this training in closing the skill gap. This activity successfully enhanced the network planning capability of the partner schools.

Architecture using tree topology has become a popular approach in managing computer networks. Tree topology combines elements of star and bus topologies, resulting in an efficient and scalable network for a variety of purposes. This paper discusses the basic concepts of architecture using tree topology, including hierarchical structures and design advantages. First, the tree topology consists of a parent node (root node) which leads to a number of branch nodes (branch nodes). Each branch node can then connect to other nodes, forming a multilevel hierarchy. In computer networks, this topology is often used to connect a number of LANs (Local Area Networks) into a larger network. The main advantages of tree topology are scalability and management efficiency. The network can be expanded by adding new branch nodes without affecting the rest of the network. Additionally, network monitoring and maintenance becomes more organized due to a clear hierarchical structure. However, tree topology also has disadvantages. If the parent node fails, then all parts of the network connected to that node can be affected. Additionally, complex implementations may require more sophisticated hardware and software. In the modern computing era, tree topologies are used in a variety of contexts, ranging from corporate network infrastructure to online content distribution. Its ability to provide an organized and extensible structure makes it an attractive choice in designing efficient and reliable network architectures.

Keamanan jaringan menjadi suatu hal yang sangat penting, terutama untuk sebuah organisasi yang menerapkan teknologi dan sistem informasi di dalamnya. Fakultas Seperti halnya yang terjadi di Fakultas Teknologi Informasi Universitas Kristen Satya Wacana (FTI UKSW). Saat ini FTI UKSW menggunakan topologi jaringan dengan perangkat MikroTik. Penelitian ini merekomendasikan perancangan desain topologi berbasis Hierarchical Network Design dan dirancang dengan menggunakan pfSense Router Firewall. Perancangan sistem difokuskan untuk bagian traffic antara Distribution Layer dan Access Layer. Hal tersebut dilakukan untuk mengamankan traffic jaringan dan memberikan proteksi secara langsung melalui Web Service pfSense. Di dalam pfSense Router Firewall, terdapat tools yaitu Intrusion Prevention System (IPS) Snort yang berfungsi untuk membantu dalam memberikan action dan blocking jika terjadi ancaman pada jaringan. Dengan desain topologi yang diusulkan tersebut diharapkan dapat menghasilkan peningkatan keamanan jaringan komputer di FTI UKSW.