You have configured your eight-node cluster to use the GRID Naming Service (GNS). The network administrator has established a delegated subdomain for the cluster, which is MYCLUSTER.COMPANY.COM…

Question

Options

• A1 GNS VIP
• B3 GNS VIPs
• C1 SCAN VIP
• D3 SCAN VIPs
• E3 Node VIPs
• F8 Node VIPs

• A
  79% (30)
• B
  5% (2)
• C
  3% (1)
• E
  13% (5)

Explanation

A: As part of the Grid Infrastructure installation process, optionally we can also provide Grid Naming Service (GNS) information, which includes the GNS Sub Domain Name and the GNS Using GNS assumes that a DHCP server is running on the public network with enough available addresses to assign the required IP addresses and the SCAN VIP. Only one static IP address is required to be configured and it should be in the DNS domain. * The node VIP and the three SCAN VIPs are obtained from the DHCP server when using GNS. * RAC instances register to SCAN listeners as remote listeners. Oracle recommends assigning 3 addresses to SCAN, which will create 3 SCAN listeners, though the cluster has got dozens of nodes.. SCAN is a domain name registered to at least one and up to three IP addresses, either in DNS (Domain Name Service) or GNS (Grid Naming Service). The SCAN must resolve to at least one address on the public network. For high availability and scalability, Oracle recommends configuring the SCAN to resolve to three addresses. SCAN components in a cluster: SCAN Listeners (3) * One VIP address for each node. * Node listeners on each node which connect clients to the chosen instance - these listeners are not normally contacted by the clients at the initial connection request and not referenced by the REMOTE_LISTENER parameter except for upgraded RAC databases from prior releases. Each local listener also has a vip and these are examples of "LOCAL RESOURCES" in the OCR. * The node VIP and the three SCAN VIPs are obtained from the DHCP server when using GNS.

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