Networking Devices and Topologies

2. VLANs (Virtual Local Area Networks)

Purpose: Logically segment a physical network into multiple isolated networks.

Benefits:

Security: Prevents unauthorized access between departments (e.g., HR vs. IT).

Performance: Reduces broadcast traffic by limiting it to specific VLANs.

Organization: Groups devices by function, not physical location.

Example: In a school, VLAN 10 for students, VLAN 20 for faculty, and VLAN 30 for guests.

QoS (Quality of Service)

Purpose: Prioritize certain types of traffic to ensure performance for critical applications.

Benefits:

Ensures low latency for VoIP or video conferencing.

Allocates bandwidth for specific users or applications.

Manages congestion in high-traffic networks.

Example: Prioritizing Zoom traffic over email in a remote work setup.

Spanning Tree Protocol (STP)

Purpose: Prevents loops in networks with redundant paths, avoiding broadcast storms.

Benefits:

Enhances reliability by enabling backup paths.

Automatically disables redundant links until needed.