An administrator connects VoIP phones to the same switch as the network PCs and printers. Which of the following would provide the BEST logical separation of these three device types while still…

Question

Options

• ACreate three VLANs on the switch connected to a router
• BDefine three subnets, configure each device to use their own dedicated IP address range, and then
• CInstall a firewall and connect it to the switch
• DInstall a firewall and connect it to a dedicated switch for each device type

• A
  85% (22)
• B
  4% (1)
• C
  4% (1)
• D
  8% (2)

Explanation

VLANs (Virtual Local Area Networks) create logical Layer 2 segments on a single physical switch, isolating broadcast domains for VoIP, PCs, and printers. Connecting the switch to a router enables inter-VLAN routing, and ACLs on the router interfaces control which traffic is permitted between VLANs. This is the most cost-effective and flexible solution. Defining subnets alone (B) doesn't provide Layer 2 isolation on the same switch. Installing a firewall without VLANs (C) doesn't logically separate traffic within the switch. Using dedicated switches per device type (D) adds unnecessary hardware cost when VLANs achieve the same logical separation more efficiently.

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