Spanning-Tree Protocol is a link management protocol that provides path redundancy while
preventing undesirable loops in the network. For an Ethernet network to function properly, only one active path can exist between two stations. Multiple active paths between stations cause loops in the network. If a loop exists in the network topology, the potential exists for duplication of messages. When loops occur, some switches see stations appear on both sides of the switch. This condition confuses the forwarding algorithm and allows duplicate frames to be forwarded. To provide path redundancy, Spanning-Tree Protocol defines a tree that spans all switches in an extended network. Spanning-Tree Protocol forces certain redundant data paths
into a standby (blocked) state. If one network segment in the Spanning-Tree Protocol becomes unreachable, or if Spanning-Tree Protocol costs change, the spanning-tree algorithm reconfigures the spanning-tree topology and reestablishes the link by activating the standby path. Spanning-Tree Protocol operation is transparent to end stations, which are unaware whether they are connected to a single LAN segment or a switched LAN of multiple segments.There is a lab about STP in Cisco CCNP 642-812 / 642- 892 exam.
Requirements:
You will configure FastEthernet ports 0/12 through 0/24 for users who belong to VLAN 20. Also, all VLAN and VTP configurations are to be completed in global configuration mode as VLAN database mode is being deprecated by Cisco. You are required to accomplish the following tasks:
1. Ensure the switch does not participate in VTP but forwards VTP advertisements received on trunk ports.
2. Ensure all non-trunking interfaces (Fa0/1 to Fa0/24) transition immediately to the forwarding state of Spanning-Tree.
3. Ensure all FastEthernet interfaces are in a permanent non-trunking mode.
4. Place FastEthernet interfaces 0/12 through 0/24 in VLAN 20
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A.32928 000d bd33 029b
B.24623 000f 34f5 039b
C.32928 000d bd03 029b
D.32768 000d bd33 029b
E.32769 000d 65db 01dd
F.32815 000d bd03 029b
G.None of the other alternatives apply
A.Listening
B.Learning
C.Disabled
D.Blocking
E.Forwarding
F.Discarding
G.None of the other alternatives apply
A.Root port
B.Nondesigned port
C.Designated port
D.Backup port
E.Alternate port
F.None of the other alternatives apply
A.32928 000d bd33 029b
B.24623 000f 34f5 039b
C.32928 000d bd03 029b
D.32768 000d bd33 029b
E.32769 000d 65db 01dd
F.32815 000d bd03 029b
G.None of the other alternatives apply
A.STP/IEEE 802.1D
B.MSTP/IEEE 802.1s
C.PVST+
D.PVRST
E.None of the other alternatives apply
最新試題
What will occur when a nonedge switch port that is configured for Rapid Spanning Tree does not receive a BPDU from its neighbor for three consecutive hello time intervals?()
During routine maintenance, G1/0/1 on DS1 was shutdown. All other interface were up. DS2 became the active HSRP device for Vlan101 as desired. However, after G1/0/1 on DS1 was reactivated. DS1 did not become the active HSRP device as desired. What need to be done to make the group for Vlan101 function properly ? ()
Refer to the exhibit. The command switchport mode access is issued on interface FastEthernet0/13 on switch CAT1. What will be the result?()
Which two statements are true about BPDU port-guard and BPDU filtering?()
Refer to the exhibit. Which statement is true about the output?()
Refer to the exhibit. What will happen when one more user is connected to interface FastEthernet 5/1? ()
Refer to the exhibit. All network links are FastEthernet. Although there is complete connectivity throughout the network, Front Line users have been complaining that they experience slower network performance when accessing the server farm than the Reception office experiences. Based on the exhibit, which two statements are true?()
Refer to the exhibit. LACP has been configured on Switch1 as shown. Which is the correct command set to configure LACP on Switch2?()
Which option correctly identifies the Cisco IOS switching methods in descending order from the fastest method to the slowest method?()
During routine maintenance, it became necessary to shutdown G1/0/1 on DS1 and DS2. All other interface were up. During this time, DS1 became the active device for Vlan104’s HSRP group. As related to Vlan104’s HSRP group. What can be done to make the group function properly ? ()