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An application administrator reports application slowness when loading the application’s web portal. The virtual machine is currently connected to a vSphere Distributed Switch. The application owner requests information about the virtual machine’s network traffic.
Which feature of a vSphere Distributed Switch should the administrator use to gather the needed information?
A. NetFlow
B. Port Mirroring
C. Network I/O Control
D. Promiscuous Mode
Correct Answer: A
Explanation/Reference:
Explanation:
NetFlow is a new feature of the dvSwitch version available in vSphere 5. It allows the monitoring of application flows (or IP traffic), which helps in capacity planning and in ensuring that I/O resources are correctly consumed in the virtual infrastructure.
Incorrect Answers:
B: Port mirroring is when a network switch relays a copy of network packets seen on switch ports to a network monitoring device linked to a different switch port. It does not gather data itself.
C: Network I/O Control allows resource pools containing network bandwidth to be created. It does not gather data.
D: Promiscuous Mode policies allow a guest operating system with a NIC placed into promiscuous mode to view all traffic on the same vSwitch or port group. It is for viewing not gathering.
References:
Atkinson, Brian, VMware Certified Professional-Data Center Virtualization on vSphere 5.5 Study Guide: VCP-550, Sybex, Indianapolis, 2014, pp 165, 166, 198, 204
