(Sample) MCSE 2003 NLB Exam Questions and Answers

70-293 level questions

Q:
cluster-to-cluster communication and failover with PrimaryApps and BackupApps.

A:
If the server that owns the quorum resource loses all network connectivity, it will voluntarily drop out of Quorum resource arbitration and be removed from the cluster. In this case, BackupApps will be able to take over ownership of the quorum resource and respond to client requests.

In the Windows 2000 implementation of clustering, if the server that owns the quorum resource lost all network connectivity, that server would retain ownership of the quorum resource and client requests would go unanswered. The second node, not being able to detect the first node or to take control of the quorum, would be removed from the cluster.

If PrimaryApps lost all network connectivity and yielded ownership of the quorum resource to BackupApps, BackupApps would take control of the quorum resource and would respond to client requests.

If PrimaryApps lost all network connectivity and refused to give up ownership of the quorum, BackupApps would in effect be no longer a part of the cluster and would therefore not be able to respond to client requests.

Q:
nlb and nlbmgr use and syntax?

A:
nlbmgr:
If remote control has not been enabled, you will need to use the nlbmgr command instead of the nlb command.

If ICMP has been disabled, the computers will not respond to ping. Therefore, no attempt will be made to contact them using WMI.

Ping uses ICMP. The /noping option allows you to contact a computer when Internet Control Messaging Protocol (ICMP) has been disabled.

If you do not specify the /noping option, nlbmgr will attempt to ping each server before using Windows Management Instrumentation (WMI) to contact it.
The autorefresh interval is specified in seconds.

nlbmgr /noping /hostlist c:\WebInfo\webhosts.txt /autorefresh 120

nlbmgr /hostlist c:\WebInfo\webhosts.txt /autorefresh 2

nlb:
Entering nlb query <mmCluster> would return information on all hosts in the cluster.

The nlb command requires remote control be enabled.

A strong password would be somewhat helpful in protecting the Web servers against tampering.

The nlb command does not take a file path as input for query.

nlb query <mmCluster>

Q:
You want to keep network traffic related to cluster management separate from traffic coming in to the FTP servers.

Which Network Load Balancing model should you choose?

Single network adapter in multicast mode

Multiple network adapters in unicast mode

Multiple network adapters in multicast mode

Single network adapter in unicast mode

A:
When you want to keep network traffic related to cluster management separate from traffic coming in to the cluster servers, you should configure the nodes with multiple network adapters in unicast mode.

If you expect heavy inbound traffic and need to maintain normal network communications between the nodes in the server, you should configure each node with multiple network adapters in multicast mode. The additional network adapter can also improve network performance.

If you don't need normal network communication between the cluster's nodes and you don't expect heavy traffic, configure each node with a single network adapter in unicast mode.

If, on the other hand, you do need to maintain normal network traffic between the nodes but you still don't expect heavy inbound traffic, use a single network adapter in multicast mode.