READ Free Dumps For Cisco- 200-125
| Question ID 16017 | What is one benefit of PVST+?
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| Option A | PVST+ supports Layer 3 load balancing without loops.
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| Option B | PVST+ reduces the CPU cycles for all the switches in the network.
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| Option C | PVST+ allows the root switch location to be optimized per VLAN.
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| Option D | PVST+ automatically selects the root bridge location, to provide optimized bandwidth usage.
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| Correct Answer | C |
Explanation Explanation: The PVST+ provides Layer 2 load-balancing for the VLAN on which it runs. You can create different logical topologies by using the VLANs on your network to ensure that all of your links are used but that no one link is oversubscribed. Each instance of PVST+ on a VLAN has a single root switch. This root switch propagates the spanning-tree information associated with that VLAN to all other switches in the network. Because each switch has the same information about the network, this process ensures that the network topology is maintained and optimized per VLAN. Reference: http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2 _55_se/configuration/guide/swstp.html
| Question ID 16018 | Which two benefits are provided by creating VLANs? (Choose two.)
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| Option A | added security
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| Option B | dedicated bandwidth
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| Option C | provides segmentation
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| Option D | allows switches to route traffic between subinterfaces
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| Option E | contains collisions
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| Correct Answer | A,C |
Explanation Explanation: A VLAN is a switched network that is logically segmented on an organizational basis, by functions, project teams, or applications rather than on a physical or geographical basis. Security: VLANs also improve security by isolating groups. High-security users can be grouped into a VLAN, possible on the same physical segment, and no users outside that VLAN can communicate with them. LAN Segmentation VLANs allow logical network topologies to overlay the physical switched infrastructure such that any arbitrary collection of LAN ports can be combined into an autonomous user group or community of interest. The technology logically segments the network into separate Layer 2 broadcast domains whereby packets are switched between ports designated to be within the same VLAN. By containing traffic originating on a particular LAN only to other LANs in the same VLAN, switched virtual networks avoid wasting bandwidth.