technology medium mcq

Which device operates at Layer 2 of the OSI model and uses MAC addresses?

  1. Router
  2. Switch
  3. Hub
  4. Gateway

Answer: Switch

Switch operates at Data Link Layer (Layer 2), using MAC addresses to forward frames to specific ports within a LAN. More efficient than hubs (broadcast to all ports). Managed switches support VLANs, QoS, and security features. Routers operate at Layer 3 using IP addresses.

Topic Internet & Networking
Exam Relevance SSC JE, Banking IT, Railway

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