A network administrator is establishing central IP addressing services for remote branch offices across a routed WAN. Workstations residing on remote subnets must obtain IPv4 leases automatically and have their hostname-to-IP address mappings updated dynamically in corporate DNS. Which TWO of the following configurations must be implemented to fulfill these requirements?
- Configure a DHCP relay agent (IP helper) on the branch router interface pointing to the central DHCP server IP address.Answer
- Enable Dynamic DNS (DDNS) integration on the DHCP server so it sends automated A and PTR record updates to the authoritative DNS server upon issuing leases.Answer
- CManually create static CNAME records for every client IPv4 address within the authoritative DNS zone file.
- DConfigure the DHCP relay agent on the router to forward client requests using TCP port 67.
- EAssign static APIPA addresses in the 169.254.0.0/16 range to client interfaces to enable automatic DNS domain registration.
Answer
The required configurations are placing a DHCP relay agent on the remote router interface pointing to the DHCP server, and enabling Dynamic DNS (DDNS) integration on the DHCP server to automatically update A and PTR records.
Implementing a DHCP relay agent (IP helper address) on the remote router interface allows DHCP broadcast requests to reach the centralized DHCP server across Layer 3 boundaries. Enabling Dynamic DNS (DDNS) on the DHCP server allows it to automatically register forward (A) and reverse (PTR) DNS records on behalf of client hosts when leases are issued.
Step-by-Step Solution
Key Concept
DHCP Relay and Dynamic DNS (DDNS) Integration
Estimated Time:1m 30s