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How to manage traffic in the network?

How do VLANs (Virtual Local Area Networks) manage network traffic?

Here's a quick breakdown of how they work:

🔌 routers connect different switches that handle devices in separate VLANs. Each switch can host devices belonging to different VLANs to ensure network division and optimized traffic flow.

💻 In the diagram, the device (H1-H8) is spread to 4 switches, each belonging to VLAN 1 or VLAN 2.

📡 routers ensure VLAN communication, ensuring smooth interaction between VLANs, while Trunk links carry VLAN data throughout the switch.

This setup improves the performance and security of the network by rationally isolating devices according to their needs.

🔑 Key Takeaway: VLANs enable more efficient network management and better traffic control. Ensuring that devices in the same group can communicate. While others are isolated!

# Recap 2025 # Take care of yourself # Open budget

# Networking # VLAN

2025/12/22 Edited to

... Read moreVLANs หรือ Virtual Local Area Networks เป็นเทคโนโลยีที่มีบทบาทสำคัญในการจัดการการจราจรในเครือข่าย โดยการแบ่งเครือข่ายออกเป็นกลุ่มย่อย ๆ ตามความต้องการขององค์กรหรือระบบ ช่วยให้การส่งข้อมูลมีการควบคุมและประสิทธิภาพมากขึ้น จากภาพที่ระบุใน OCR พบว่าอุปกรณ์ H1 ถึง H8 ถูกแบ่งออกเป็น VLAN 1 และ VLAN 2 ซึ่งเชื่อมโยงกันผ่าน switch 4 ตัว และถูกควบคุมผ่าน router ที่ช่วยให้การสื่อสารระหว่าง VLAN เป็นไปอย่างราบรื่น Key components ที่สำคัญในระบบนี้ ได้แก่ - เราเตอร์ซึ่งทำหน้าที่เชื่อมต่อ VLAN ต่าง ๆ และกำหนดเส้นทางสำหรับข้อมูล - Switch ที่รองรับ trunk link ซึ่งเป็นการรวมหลาย VLAN เข้าไว้ในสายสัญญาณเส้นเดียว ทำให้ข้อมูลสามารถไหลผ่านได้หลาย VLAN พร้อมกัน การกำหนด VLAN นั้นช่วยให้สามารถแบ่งอุปกรณ์ออกจากกันตามหน้าที่หรือหน่วยงาน ช่วยลดปัญหาการชนกันของข้อมูลหรือ collision ในเครือข่าย อีกทั้งยังช่วยเพิ่มประสิทธิภาพเครือข่ายและสร้างความปลอดภัยโดยการจำกัดการเข้าถึงข้อมูลเฉพาะผู้ที่อยู่ใน VLAN เดียวกันเท่านั้น ตัวอย่างเช่น ในองค์กรที่มีหลายแผนก การแยก VLAN สำหรับแผนกไอทีและแผนกบัญชี จะช่วยป้องกันไม่ให้ข้อมูลที่ละเอียดอ่อนของฝ่ายหนึ่งถูกเข้าถึงโดยฝ่ายอื่นโดยไม่จำเป็น นอกจากนี้ VLAN ยังทำให้การจัดการเครือข่ายง่ายขึ้น เพราะการเพิ่ม หรือลดอุปกรณ์ในเครือข่ายไม่จำเป็นต้องเดินสายใหม่ เพียงแค่กำหนดการตั้งค่าใน switch ก็สามารถย้ายอุปกรณ์ไปยัง VLAN อื่นได้ทันที สรุปได้ว่า การใช้ VLAN เป็นวิธีหนึ่งที่สามารถจัดการการจราจรในเครือข่ายได้อย่างมีประสิทธิภาพ ทำให้เครือข่ายมีความยืดหยุ่นและปลอดภัยมากขึ้น เหมาะสำหรับองค์กรที่ต้องการควบคุมและแยกแยะการสื่อสารภายในเครือข่ายอย่างเป็นระบบ

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