Which two options are true regarding Grid Naming Service (GNS)?
A.
GNS daemon runs only on one node in the cluster at a time
B.
GNS replaces DNS
C.
GNS replaces all VIPs
D.
GNS requires DHCP
E.
GNS is not managed by Clusterware
Explanation:
A: Oracle Clusterware Daemon (CRSD)
CRS daemon (Oracle Cluster Ready Services Daemon) internode connection. The port number is
assigned automatically during installation. You cannot view or modify it afterward.
This port is used exclusively with the cluster interconnect.
D: To set up an Oracle 11g R2 RAC installation using Oracle Grid Naming Services (GNS) the
following requirements need to be met:
* At least two interfaces configured on each node, one for the private IP address and one for the
public IP address.
* A Domain Naming Server (DNS) running in the network for the address resolution of the GNS
virtual IP address and hostname.
* The DNS entry to configure the GNS sub-domain delegation
* A DHCP server running on the same public network as your Oracle RAC cluster.
Incorrect:
Within the subdomain, the GNS uses multicast Domain Name Service (mDNS) (not B), included
with Oracle Clusterware (not E), to enable the cluster to map host names and IP addresses
dynamically as nodes are added and removed from the cluster, without requiring additional host
configuration in the DNS.