You are about to migrate a customer network to use a VSS. Which of these statements is true about a VSS? (Exhibit)
A.
The VSS switch must be the root bridge for all VLANs and is automatically designated.
B.
The VSS switch is defined in RFC 4318 as a managed object.
C.
The PAgP+ or LACP protocols are used to maintain the operational state of the VSS devices. D.
D.
A VSS interoperates with a virtual port channel.
E.
The 802.1Q or ISL protocols are used to maintain the operational state of the VSS devices.
F.
A VSS increases the size of the spanning-tree domain.
Explanation:
Virtual switching system (VSS) is a network system virtualization technology that pools multiple Cisco Catalyst 6500 Series Switches into one virtual switch, increasing operational efficiency boosting nonstop communications, and scaling system bandwidth capacity to 1.4 Tbps. At the initial phase, a VSS will allow two physical Cisco Catalyst 6500 Series Switches to operate as a single logical virtual switch called a virtual switching system 1440 (VSS1440)Virtual Switching System 1440 Compared to Traditional Network Design
(Reference: http://www.cisco.com/en/US/products/ps9336/products_tech_note09186a0080a7c837.shtml)
C is the correct answer as in the recommendations of the above link, the author wrote:
Do not use on and off options with PAgP or LACP or Trunk protocol negotiation.
* PAgP Run Desirable-Desirable with MEC links.
* LACP Run Active-Active with MEC links.
* Trunk Run Desirable-Desirable with MEC links.