To which port will a switch forward a broadcast IPv4 DHCP request from a PC?

To which port will a switch forward a broadcast IPv4 DHCP request from a PC?

• A. To the VLAN trunk port only
• B. To fa0/1-3
• C. To a designated management port
• D. To the switch's uplink port

Answer: (B)

When a switch receives a broadcast IPv4 DHCP request from a PC, it needs to determine which ports to forward that broadcast frame to. A DHCP request is a broadcast packet sent by a client to discover available DHCP servers, and since it is a broadcast, the switch will need to send it out to all ports in the same broadcast domain. In this scenario, option B indicates that the switch will forward the broadcast to the specific ports fa0/1-3. This is appropriate because all ports that are part of the same VLAN (Virtual LAN) where the DHCP client resides need to receive the broadcast. By forwarding to fa0/1-3, the switch ensures that all devices connected to those ports can hear the DHCP request and respond if they have a DHCP service available. Broadcasts do not get forwarded through trunk links or uplink ports to other VLANs unless specifically configured to do so through certain protocols—which wouldn’t apply in this context since the question specifically addresses the behavior within the originating VLAN. Hence, focusing on the designated access ports within the same VLAN where the client resides is essential for ensuring the DHCP request gets to its intended audience correctly.

When a switch receives a broadcast IPv4 DHCP request from a PC, it needs to determine which ports to forward that broadcast frame to. A DHCP request is a broadcast packet sent by a client to discover available DHCP servers, and since it is a broadcast, the switch will need to send it out to all ports in the same broadcast domain.

In this scenario, option B indicates that the switch will forward the broadcast to the specific ports fa0/1-3. This is appropriate because all ports that are part of the same VLAN (Virtual LAN) where the DHCP client resides need to receive the broadcast. By forwarding to fa0/1-3, the switch ensures that all devices connected to those ports can hear the DHCP request and respond if they have a DHCP service available.

Broadcasts do not get forwarded through trunk links or uplink ports to other VLANs unless specifically configured to do so through certain protocols—which wouldn’t apply in this context since the question specifically addresses the behavior within the originating VLAN. Hence, focusing on the designated access ports within the same VLAN where the client resides is essential for ensuring the DHCP request gets to its intended audience correctly.