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Question 177 - N10-008 discussion

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Which of the following describes the BEST device to configure as a DHCP relay?

A.
Bridge
Answers
A.
Bridge
B.
Router
Answers
B.
Router
C.
Layer 2 switch
Answers
C.
Layer 2 switch
D.
Hub
Answers
D.
Hub
Suggested answer: B

Explanation:

Normally, routers do not forward broadcast traffic. This means that each broadcast domain must be served by its own DHCP server. On a large network with multiple subnets, this would mean provisioning and configuring many DHCP servers. To avoid this scenario, a DHCP relay agent can be configured to provide forwarding of DHCP traffic between subnets. Routers that can provide this type of forwarding are described as RFC 1542 compliant. The DHCP relay intercepts broadcast DHCP frames, applies a unicast address for the appropriate DHCP server, and forwards them over the interface for the subnet containing the server. The DHCP server can identify the original IP subnet from the packet and offer a lease from the appropriate scope. The DHCP relay also performs the reverse process of directing responses from the server to the appropriate client subnet.

asked 02/10/2024
John Kaye
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