In this network, what device serves as the default gateway for workstations?

• A. The ADNS
• B. The WUG server
• C. The switch
• D. The router.

Answer: (D)

The default gateway is the router. A workstation sends traffic destined for other networks to this device, using the router’s LAN IP as its gateway. The router then routes the packet toward its destination outside the local subnet. A switch handles only local, same-subnet traffic, so it isn’t used as the default gateway in typical networks. DNS or directory services like the ADNS or WUG server provide name resolution and services, not routing for general traffic.