A network administrator is provisioning network core services across multiple VLANs in a enterprise campus network. Centralized infrastructure services, including DHCP and DNS, reside on VLAN 10 (), whereas user client workstations reside on VLAN 20 () and VLAN 30 (). Which TWO of the following configuration steps must be implemented to ensure client hosts on remote VLANs can automatically acquire network configuration settings and properly resolve internal hostnames to dual-stack IPv6 resources? (Select TWO)
- Configure an IP helper address on the router interfaces serving VLAN 20 and VLAN 30 pointing to the IP address of the central DHCP serverCevap
- Create AAAA records on the internal DNS server mapping fully qualified domain names to their assigned 128-bit IPv6 addressesCevap
- CDeploy the DHCP relay agent on the central server VLAN 10 interface rather than on the client default gateway router interfaces
- DCreate CNAME records on the primary DNS server to resolve canonical hostnames directly to raw IPv6 protocol address strings
- EConfigure client endpoints to execute time synchronization using NTP operating over TCP port 123
Cevap
The correct configurations are to set up an IP helper address on the router interfaces serving the client VLANs (VLAN 20 and VLAN 30) pointing to the central DHCP server IP address, and to create AAAA records on the DNS server for IPv6 hostname resolution.
Configuring an IP helper address on client-facing gateway router interfaces enables DHCP relay functionality, allowing broadcast DHCP discovery requests from client VLANs to be forwarded as unicast packets to the central DHCP server. Furthermore, DNS resolution of domain names to IPv6 addresses requires AAAA records.
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IP Addressing Services (DHCP Relay Agent and DNS Record Types)
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