Exam 2V0-21.23 topic 1 question 92 discussion

https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-vcenter-upgrade/GUID-752FCA83-1A9B-499E-9C65-D5625351C0B5.html If you plan to use an FQDN for the appliance system name, you must verify that the FQDN is resolvable by a DNS server, by adding forward and reverse DNS A records.

While the answer is indeed C&D, the naming is confusing: there's no 'reverse A', but 'PTR' records in DNS.

Before starting the installation of the vCenter Server Appliance, the administrator must complete the following actions: C. Create a reverse DNS A record for the vCenter Server (vcsa01). A reverse DNS A record associates an IP address with a hostname. Creating this record ensures that the IP address 172.20.10.100 resolves to the hostname vcsa01.corp.local. E. Create a forward DNS A record for the vCenter Server (vcsa01). A forward DNS A record maps a hostname to an IP address. Creating this record ensures that the hostname vcsa01.corp.local resolves to the IP address 172.20.10.100. These actions ensure proper DNS resolution for the vCenter Server Appliance during installation. Therefore, the correct actions to complete before starting the installation are C and E.

CE is the correct answer. A & B are CNAME records, which are aliases...useless. D is to exclude too, having a DNS record for the ESXi host is not necessary for vCenter deployment.

To use an FQDN for the appliance system name, make sure the FQDN can be resolved by a DNS server. Add forward and reverse DNS A records for verification. https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-vcenter-upgrade/GUID-752FCA83-1A9B-499E-9C65-D5625351C0B5.html#GUID-24D34C53-B00E-47B7-92A7-6B0155DF6889__GUID-D5BC40DF-91CA-4B56-A041-BFCED5FA2806:~:text=If%20you%20plan%20to%20use%20an%20FQDN%20for%20the%20appliance%20system%20name%2C%20you%20must%20verify%20that%20the%20FQDN%20is%20resolvable%20by%20a%20DNS%20server%2C%20by%20adding%20forward%20and%20reverse%20DNS%20A%20records.

AB, new deployment, not an upgrade, the bare minimum are forward records.

DNS entry forward and reverse are mandatory

CE is incorrect. AE is correct as before starting the installation of the vCenter Server Appliance, the administrator must complete the following these two actions:

I AGREE: C-E https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-vcenter-upgrade/GUID-752FCA83-1A9B-499E-9C65-D5625351C0B5.html GOOD ARTICLE JUST HAVE TAKE TIME OUT READY

C E is correct. to use FQDN you need both forward and reverse DNS A records