Which component automates IP address assignment within a VLAN-scoped network?

Which component automates IP address assignment within a VLAN-scoped network?

• A. DHCP
• B. DNS
• C. IPAM
• D. NAC

Answer: (A)

Dynamic IP address assignment within a VLAN-scoped network is handled by DHCP. DHCP automates giving devices an IP address, along with subnet mask, default gateway, and other network settings, by issuing a lease that devices renew. In a VLAN setup you create separate DHCP scopes or pools for each VLAN so devices in different VLANs receive addresses from the correct range. A DHCP relay agent may be used if the DHCP server isn’t in the same VLAN/subnet, allowing clients to reach the server across routers. DNS translates hostnames to IP addresses but doesn’t assign IPs. IPAM manages the inventory and tracking of IP addresses, but doesn’t perform automatic assignment to hosts. NAC focuses on authenticating devices and enforcing access policies, not IP address provisioning.

Dynamic IP address assignment within a VLAN-scoped network is handled by DHCP. DHCP automates giving devices an IP address, along with subnet mask, default gateway, and other network settings, by issuing a lease that devices renew. In a VLAN setup you create separate DHCP scopes or pools for each VLAN so devices in different VLANs receive addresses from the correct range. A DHCP relay agent may be used if the DHCP server isn’t in the same VLAN/subnet, allowing clients to reach the server across routers. DNS translates hostnames to IP addresses but doesn’t assign IPs. IPAM manages the inventory and tracking of IP addresses, but doesn’t perform automatic assignment to hosts. NAC focuses on authenticating devices and enforcing access policies, not IP address provisioning.