Oracle Exam 1Z0-580 Topic 10 Question 24 Discussion

Note:

* virtual local area networks (VLANs), link aggregations, and IP tunnels can be assigned administratively-chosen names and then configured by referring to those names.

* VNICs are pseudo interfaces that you create on top of datalinks. A VNIC has an automatically generated MAC address. Depending on the network interface in use, you can explicitly assign to a VNIC a MAC address other than the default address, as described in the dladm(1M) man page. You can create as many VNICs over a datalink as you require.

* Etherstubs are pseudo ethernet NICs which are managed by the system administrator. You can create VNICs over etherstubs instead of over physical links. VNICs over an etherstub become independent of the physical NICs in the system. With etherstubs, you can construct a private virtual network that is isolated both from the other virtual networks in the system and from the external network. For example, you want to create a network environment whose access is limited only to your company developers than to the network at large. Etherstubs can be used to create such an environment.

* The basic link aggregation topology involves a single aggregation that contains a set of physical interfaces. You might use the basic link aggregation in the following situations:

For systems that run an application with distributed heavy traffic, you can dedicate an aggregation to that application's traffic.

For sites with limited IP address space that nevertheless require large amounts of bandwidth, you need only one IP address for a large aggregation of interfaces.

For sites that need to hide the existence of internal interfaces, the IP address of the aggregation hides its interfaces from external applications.