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Nguyen Khac Quyet - Take Exam Exam questions Time remaining: 00: 40: 02 1 . IEEE 802.1w RSTP defines which of the following port states ? Listening, Learning, Forwarding, Blocking, Disabled Learning, Forwarding, Discarding Learning, Active, Block Listening, Forwarding, Active, Blocking 2 . Broadcast storms can: Disrupt the network by absorbing all bandwidth capacity Sometimes be useful depending on the circumstance Not interfere with your bandwidth Be an indication that you need more bandwidth 3 . The root bridge will have a priority of ______ and a secondary priority of ______ when using the “set spantree root” command. 8192, 16384 512, 1024 1024, 2048 16384, 32768 4 . Once STP has completed running its algorithm, which of the following states could a port be in? Choose all the correct answers. Blocking Listening Forwarding Disabled 5 . If you have a port speed set for auto-negotiation: you must set the duplexing manually you won’t be able to manually set the duplexing the port will not dynamically configure itself with a speed that is supported by the connecting device the port only supports one speed 6 . From the following “show spantree vlan-number” output, how can you tell if you’re looking at the data from the root bridge? Choose two. show spantree 2 VLAN 2 Spanning tree enabled Designated Root 00-50-74-7f-4a-00 Designated Root Priority 32768 Designated Root Cost 0 Designated Root Port 1/0 Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec Bridge ID MAC ADDR 00-50-74-7f-4a-00 Bridge ID Priority 32768 Rest of output omitted The Bridge ID Priority and the Designated Root Priority are the same The Designated Root and the Bridge ID MAC ADDR are the same The Root Max Age is more than 15 seconds The Designated Root Cost is zero (0) 7 . The spanning tree protocol decides which port to disable based on three things. What are they? Port cost Port priority Port distance MAC address 8 . "How does a non-Root switch choose its Root Port? It chooses the port with the lowest cumulative Root Path Cost to the Root Bridge. It chooses the port with the highest cumulative Root Path Cost to the Root Bridge. The port receives an inferior BPDU from a neighboring switch on a shared LAN segment. The port receives a BPDU announcing a higher Root Path Cost from a neighboring switch on a shared LAN segment. 9 . As your network grows, it is important to: Add as many routers as possible, which will give redundancy Make sure that the root bridge selected will be the most optimal for your network Limit the number of designated roots in the network Set up eight-port EtherChannels, if possible 10 . The designated bridge on each LAN segment is elected using: the switch within the segment with the lowest accumulated path cost to the root bridge the switch within the segment with the highest accumulated path cost to the root bridge the switch within the segment with the lowest bridge identifier or lowest MAC address the switch within the segment with the highest bridge identifier 11 . On a Catalyst switch, what happens when a port is attached or removed and the spanning tree is turned on? The ports go into listening mode for 10 seconds The ports go into learning mode for 15 seconds The ports go into blocking mode for 15 seconds The ports go into sleeping mode for 20 seconds 12 . Fast EtherChannels: use two line modules that act as a single module is configured as separate instances of spanning tree per link treats two links as a single spanning tree logical link use gigabit Ethernet 13 . Spanning Tree Algorithm is used in bridged or switched LANs to: Identify destinations for multicasts Flood segments with frames from unknown sources Identify the segments connected to the bridge or switch Flood segments with frames to unknown destinations Avoid broadcast storms by eliminating loops in the network 14 . Loops within one spanning tree can: cause problems with other spanning trees do not effect other spanning trees Distribute root bridge information Distribute designated bridge information 15 . Spanning Tree Protocol guarantees a loop-free environment and an optimal configuration. True False 16 . How would you reduce BPDU traffic when there is only one root bridge? Increase the Hello Time timer Decrease the Max Age timer Add an additional root bridge Set the port channel 17 . The root bridge is elected using: the lowest accumulated path cost to the root port the highest accumulated path cost to the root port the lowest bridge identifier or lowest MAC address the highest bridge identifier 18 . If a bridge receives BPDUs from multiple ports, what does this tell you? That there is a preferred path and also a redundant path to the root port That there are multiple paths to the root bridge and one of them will have to be disabled That there are multiple paths to the root bridge and both of them will have to be disabled That there are multiple paths to the root bridge and both of them should be enabled 19 . The root ports on each switch are elected using: the port on each switch with the lowest accumulated path cost to the root bridge the port on each switch with the highest accumulated path cost to the root bridge the port on each switch with the lowest bridge identifier or lowest MAC address the port on each switch with the highest bridge identifier 20 . It is highly recommended that UplinkFast only be configured on: Distribution switches Leaf switches Core Switches Both Access and Distribution switches Showing page 1 of 1 : SubmitGo! © 2004 HanoiCTT. All rights reserved.