Virtual Network Adapters

Correct Answer: Configure the virtual network adapter settings

The best course of action when experiencing slow network performance after switching to a virtual machine environment would be to 'configure the virtual network adapter settings'. This is because the configuration of the virtual network adapter directly affects the network performance in a virtual environment. Changing its settings could potentially lead to improved network speeds. 'Replace the physical network adapter' is not likely to effectively address the issue, as the problem arose after the change to a virtual environment. The physical network adapter is only one component of the complete networking picture and it's unlikely that replacing it will resolve a problem stemming from the virtualization process. 'Add more physical servers' would not necessarily solve the issue since the problem seems to be directly related to the move to virtual machines. The number of physical servers doesn't usually correlate with network speeds. Finally, 'Change the virtual server's operating system' would not normally impact network performance to a large degree and is unlikely to solve the issue. It's also a significant change that could cause other problems.

Correct Answer: Connect the new node to the same virtual switch

In order to keep the Virtual Machines (VMs) on the same logical network in a virtualization cluster, you need to 'Connect the new node to the same virtual switch'. A virtual switch allows VMs to communicate with each other on the same network. Connecting the new node to a different virtual switch or a different subnet would isolate it from the rest of the nodes on the network, defeating the primary purpose of having a cluster. Enabling round-robin DNS doesn't specifically relate to maintaining the same logical network, so it's not the correct choice in this case.

Correct Answer: Configure NIC teaming

The best solution to increase network adapter redundancy for virtual machines is to 'Configure NIC teaming'. This process allows for two or more network interfaces to be connected in parallel to increase the bandwidth and provide fault tolerance. If one interface fails, the other can continue operating, thereby reducing downtime and potential data loss. On the other hand, 'Add another virtual switch' would increase complexity without necessarily improving redundancy. 'Enable promiscuous mode' would decrease security without providing redundancy as it allows all traffic to be received by a network adapter. Finally, 'Configure VLANs on virtual adapters' would segregate network traffic, which could improve security, but does not inherently provide redundancy or fault tolerance.