200-301 Question #408: Real Exam Question with Answer & Explanation

The correct answer is A: default-router. When configuring DHCP on a Cisco router, the default-router command within the DHCP pool configuration is used to specify the IP address that will be distributed to clients as their default gateway. This ensures clients can route traffic outside their local subnet.

Submitted by femi9· Mar 5, 2026

Question

When DHCP is configured on a router, which command must be entered so the default gateway is automatically distributed?

Options

Adefault-router
Bdefault-gateway
Cip helper-address
Ddns-server

Explanation

When configuring DHCP on a Cisco router, the default-router command within the DHCP pool configuration is used to specify the IP address that will be distributed to clients as their default gateway. This ensures clients can route traffic outside their local subnet.

Common mistakes.

B. default-gateway is not a standard Cisco IOS DHCP pool command for distributing the default gateway to clients; the correct command is default-router.
C. ip helper-address is used on an interface to forward DHCP broadcast requests to a DHCP server on a different subnet, not to define the default gateway for clients.
D. dns-server is used in a DHCP pool configuration to distribute the IP address of DNS servers to clients, not the default gateway.

Concept tested. DHCP server configuration on routers

Reference. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/15-mt/dhcp-15-mt-book/config-dhcp-server.html

Topics

#DHCP configuration#Cisco IOS DHCP#Default gateway#Router commands

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