SWRE Unit 5 (Stp)

A network administrator has connected two switches together using EtherChannel technology. If STP is running, what will be the end result?

• • The switches will load balance and utilize both EtherChannels to forward packets.

• • STP will block one of the redundant links.

• • The resulting loop will create a broadcast storm.

• • Both port channels will shutdown.

What protocol or technology disables redundant paths to eliminate Layer 2 loops?

• STP

• VTP

• EtherChannel

• DVDA

All the displayed switches are Cisco 2960 switches with the same default priority and operating at the same bandwidth. Which three ports will be STP designated ports? (Choose three.)

• F0/9

• F0/13

• F0/20

• F0/21

• F0/10

On what switch ports should BPDU guard be enabled to enhance STP stability?

• • all trunk ports that are not root ports

• • only ports that are elected as designated ports

• • all PortFast-enabled ports

• • only ports that attach to a neighboring switch

Which network attack is mitigated by enabling BPDU guard?

• • rogue DHCP servers on a network

• • MAC address spoofing

• • CAM table overflow attacks

• • rogue switches on a network

What are the possible port roles for ports A, B, C, and D in this RSTP-enabled network?

• • designated, root, alternate, root

• • alternate, root, designated, root

• • designated, alternate, root, root

• • alternate, designated, root, root

Which two types of spanning tree protocols can cause suboptimal traffic flows because they assume only one spanning-tree instance for the entire bridged network? (Choose two.)

• MSTP

• RSTP

• Rapid PVST+

• PVST+

• STP

What is an advantage of PVST+?

• • PVST+ optimizes performance on the network through load sharing.

• • PVST+ requires fewer CPU cycles for all the switches in the network.

• • PVST+ reduces bandwidth consumption compared to traditional implementations of STP that use CST.

• • PVST+ optimizes performance on the network through autoselection of the root bridge.

A network administrator is preparing the implementation of Rapid PVST+ on a production network. How are the Rapid PVST+ link types determined on the switch interfaces?

• • Link types can only be configured on access ports configured with a single VLAN.

• • Link types can only be determined if PortFast has been configured.

• • Link types are determined automatically.

• • Link types must be configured with specific port configuration commands.