Network+ PBQ 1: VLAN Switching Configuration

Scenario

A company has one managed switch connected to a router-on-a-stick. Users in Sales, Accounting, and Voice need separate VLANs. The AP also needs a guest VLAN. A new phone and workstation share the same wall jack on port Gi1/0/12.

Your task: Match each interface or feature to the correct switching configuration.

Network	VLAN	Subnet
Sales	10	192.168.10.0/24
Accounting	20	192.168.20.0/24
Voice	30	192.168.30.0/24
Guest Wi-Fi	40	192.168.40.0/24

1. Port Gi1/0/12 connects to a VoIP phone with a workstation behind it. Best port mode?

2. Data VLAN on Gi1/0/12 for the workstation:

3. Voice VLAN on Gi1/0/12:

Switching Decisions

4. Uplink from switch to router carrying multiple VLANs should use:

5. Logical Layer 3 interface for a VLAN on a switch is called:

6. Protocol/feature used to prevent Layer 2 loops:

7. Best way to increase bandwidth/redundancy between two switches using multiple links:

Instructor Answer

Use an access port with data VLAN and voice VLAN for a phone + workstation shared port.
Sales workstation traffic belongs in VLAN 10.
Voice traffic belongs in VLAN 30.
Use an 802.1Q trunk when multiple VLANs traverse one uplink.
An SVI provides a logical Layer 3 interface for a VLAN.
Spanning Tree helps prevent Layer 2 loops.
Link aggregation combines links for bandwidth and redundancy.