Chenczen C. Rafael

BS in Information Systems

Hello, I am Chenczen C. Rafael from Sta.Lucia, Quirino, Isabela, an alumnus of Isabela State University – Main Campus, holding a Bachelor of Science in Information Systems degree. During my academic years, I acquired a strong foundation in both the theoretical concepts and practical applications of Information Systems. My coursework and hands-on projects covered a wide range of areas including Programming, IT Networking, IT Diagramming, Database Management, IT Mathematics, Business Process Management, and Computer Fundamentals. After graduating, I continued to enhance my IT skills by providing academic assistance and technical services. I supported students in IT, IS, and CS programs by assisting them with:
- IT Networking tasks using Cisco Packet Tracer,
- IT Diagramming tasks using Draw.io,
- Database Management tasks using MySQL Workbench,
- and Coding assignments and projects using Visual Studio Code (VSCode)
Through these initiatives, I applied my knowledge to real-world academic challenges, helping students improve their technical competencies and succeed in their coursework.


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IT Skillsets

Essential services crucial for Business Process improvement

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01

IT Networking (Intermediate)

  • IP Addressing: Efficient allocation and management of IP addresses in network using static and DHCP.
  • Subnetting: Segmenting larger networks into smaller, efficient subnetworks.
  • Routing: setting up Routing protocols and configurations.
  • Switching: : setting up trunking and accessing interface and management of VLAN's.
  • Network Testing and Troubleshooting: Identifying and resolving network issues.
  • Network Topologies & Design: Designing network layouts for implementation and upgrading Infrastructures.
  • Monitoring: Analyzing network performance to ensure uptime and connectivity.
  • Cabling: Connecting wires with proper port and Cables.
  • Load Balancing: configuring load balancers .
  • VoIP Management: Setting up and managing VoIP systems.
  • Server Management: Configuring Server to provide network service.
  • VLAN Managemen: Creating and Managing VLANS for separating
  • Network Security: Configuration of permit and authorization between Devices,Users, and Networks.
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02

IT Diagrams (Intermediate)

  • Flowchart: Design a System base on the process
  • Data Flow Diagram (DFD): Creating Diagram to represent System Information flow.
  • Entity Relationship Diagram (ERD): Model a Database with Tables and their relationships.
  • Functional Decomposition Diagram (FDD): Breaking down a complex System into Hierarchical System.
  • Unified Modeling Language (UML): Using UML for software design.
  • Business Process Modeling and Notation (BPMN): Designing business processes for workflow simulation of the System.
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03

Database (Intermediate)

  • Queries: Writing SQL Statements and proper usage of data types.
  • Schema: Creating Database and setting up connections.
  • Data Backup: Setting up database in restoring and recovering.
  • Algebraic Operation: Performing conditional statement using algebra functions.
  • Connecting: Setting up server for Database.
  • Database Modeling: Know how to create ERD .
  • CRUD Operation: Manage Tables by performing CREATE, READ,UPDATE, DELETE statements.
  • SQL Joins: Combining data's from different Tables to a single queries.
  • Normalization: using 1st, 2nd , and 3rd database normalization.
  • Database Monitoring: Analyzing Database queries.
  • Database Security: Setting password and privileges.
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04

Web Development (Beginner)

  • CMS(WordPress): Developing and managing content-driven websites.
  • Back-end(PHP, MySQL): Setting up connections between Database and the System, create Logical statement and perform CRUD.
  • Front-end(JavaScript, HTML, CSS): Creating User interface of the System from color grading, font styling, layout structuring, and Screen Responsiveness .
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04

Others

  • Information Systems Strategic Planning: Creation of IT solutions by aligning Business needs and process.
  • Console Programming (Java, C++): Writing and debugging basic console codes.
  • Conceptual Business: Understand Business Processes and Procedures.
  • Data Visualization: Graph Data's using Power-BI.
  • Basic Math: Knowledge in Boolean Algebra, Graph Theory, Finance, Arithmetic, and Geometry.

My Projects

IT-Networking-DHCP-VLAN-Telephony

Basic Networking Topology with DHCP addressing for Each End Devices in Both VLANs, setting up Telephony service in Voice VLAN.

Project Screenshot

IT-Networking-IP-Routing-OSPF

Basic Networking Topology with DHCP addressing, VLAN Management, and IP Routing for Each Networks.

Project 2 Screenshot

Database-Management-Insert-Select-Update-Delete

Basic CRUD Operation in MySQL for Restaurant Database.

Project 2 Screenshot

IT-Diagrams-Data-Flow-Diagram-of-Student-Management

Data Flow Diagram of Student Management with Shapes Styles.

Project 4 Screenshot

IT-Networking-Small-Business-Network

Network Topology for Small Business with DHCP, Telephony, VLAN, Port Security, HSRP, Router Password, and OSPF.

Project 5 Screenshot

Database-Management-Grocery-Store

Database Model for Grocery Store with INSERT and SELECT Operation and CASE and JOINS queries.

Project 6 Screenshot

IT-Diagramming-Call-Center-Agent

Business Process Model and Notation of Call Center Agent Responsibility.

Project 7 Screenshot

Oops!!!, out of Contents

Another Projects will be created soon, stay tune and uptated

Project N Screenshot