Switch R1 has been configured with the root guard feature.
What statement is true if the spanning tree enhancement Root Guard is enabled？ （）
A. If BPDUs are not received on a non-designated port， the port is moved into the STP loop- inconsistent blocked state
B. IF BPDUs are received on a PortFast enabled port， the port is disabled.
C. If superior BPDUs are received on a designated port， the interface is placed into the root- inconsistent blocked state.
D. If inferior BPDUs are received on a root port， all blocked ports become alternate paths to the root bride.
您可能感興趣的試卷
你可能感興趣的試題
You are the network administrator tasked with designing a switching solution for the Company network.
Which of the following statements describing trunk links are INCORRECT？（）
A. The trunk link belongs to a specific VLAN.
B. Multiple trunk links are used to connect multiple end user devices.
C. A trunk link only supports native VLAN.
D. Trunk links use 802.10 to identify a VLAN.
E. The native VLAN of the trunk link is the VLAN that the trunk uses for untagged packets.
ISL is being configured on a Company switch.
Which of the following choices are true regarding the ISL protocol？ （）
A. It can be used between Cisco and non-Cisco switch devices.
B. It calculates a new CRC field on top of the existing CRC field.
C. It adds 4 bytes of protocol-specific information to the original Ethernet frame.
D. It adds 30 bytes of protocol-specific information to the original Ethernet frame.
Which of the following trunking modes are unable to request their ports to convert their links into trunk links？ （）
A. Negotiate
B. Designate
C. No negotiate
D. Auto
E. Manual
F. Off
If you were to set up a VLAN trunk over a Fast Ethernet link on switch R1，
which trunk mode would you set the local port to on R1 if you wanted it to respond to requests from its link partner （R2） and become a trunk？ （）
A. Auto
B. Negotiate
C. Designate
D. No negotiate
You are the network administrator at Company and switch R1 is configured as shown below： Interface gigethernet 0/1 Switchport mode trunk
Switchport trunk encapsulation dot1q Switchport trunk native vlan 5
If untagged frames are arriving on interface gigethernet 0/1 of R1，
which of the following statement are correct？（）
A. Untagged frames are automatically assumed to be in VLAN 5.
B. Untagged frames are defaulted to VLAN 1 traffic.
C. Untagged frames are dropped because all packets are tagged when dot1q trunked.
D. Untagged frames are determined on the other switch
E. Untagged frames are not supported on 802.1Q trunks.
最新試題
Which option correctly identifies the Cisco IOS switching methods in descending order from the fastest method to the slowest method？（）
Which statement is correct about the use of the virtual interface on a WLC ？（）
Refer to the exhibit. On the basis of the output of the show spanning-tree inconsistentports command， which statement about interfaces FastEthernet 0/1 and FastEthernet 0/2 is true？（）
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？（）
Which statement is correct about RSTP port roles？（）
Which three statements are true of the Link Aggregation Control Protocol （LACP）？（）
Refer to the exhibit. What command was issued on the Layer 3 switch Sw1 between Exhibit #1 and Exhibit #2？（）
Refer to the exhibit and the partial configuration of switch SW_A and SW_B. STP is configured on all switches in the network. SW_B receives this error message on the console port：00：06：34： %CDP-4-DUPLEX_MISMATCH： duplex mismatch discovered on FastEthernet0/5 （not half duplex）， with SW_A FastEthernet0/4 （half duplex） ， with TBA05071417（Cat6K-B） 0/4 （half duplex）. What would be the possible outcome of the problem？（）
Refer to the exhibit. Switch S2 contains the default configuration. Switches S1 and S3 both have had the command spanning-tree mode rapid-pvst issued on them. What will be the result？（）
Refer to the exhibit. Which Virtual Router Redundancy Protocol （VRRP） statement is true about the roles of the master virtual router and the backup virtual router？（）