You are configuring your edge routers interface with a public IP address for Internet connectivity. The router needs to obtain the IP address from the service provider dynamically. Which command is ne

The `ip default-gateway` command specifies the gateway of last resort for the router itself, not for obtaining an IP address dynamically on an interface.

The `ip route` command is used to configure static routes in the routing table, not to dynamically assign an IP address to an interface.

The `ip default-network` command is an older method to establish a default route by designating a network that exists in the routing table, not for dynamic IP assignment.

The `ip address dhcp` command on a Cisco IOS interface configures it to act as a DHCP client, allowing it to dynamically obtain an IP address, subnet mask, and other IP parameters from a DHCP server.

`ip address dynamic` is not a valid Cisco IOS command for configuring dynamic IP address acquisition on an interface.