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 stateB、 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.
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.
相关考题：
A company is experiencing network delays. The network administrator discovers that a worker in a location far from the MDF has connected an old 10BASE-T switch with redundant links to the existing network.How could this action be responsible for the impaired network performance?（）A. Connecting a host to the old switch has created a broadcast storm.B. The 10BASE-T switch forced the entire network to be reduced to 10 Mbps operation.C. The old switch does not support VLANs, which has disabled the VLAN configuration of the entire the network.D. The old switch does not support full-duplex operation, effectively forcing half-duplex operation throughout the network.E. Spanning Tree Protocol has elected the old switch as the root bridge, creating inefficient data paths through the switched network.
Refer to the exhibit. Network 10.0.0.0／8 is being advertised to autonomous system 65550 via both external links. Which statement about the preferred path to the 10.0.0.0／8 network is true? () A. Router R2 will be preferred because it has the higher neighbor IP address.B. Router R2 will be preferr ed because its neighbor has a lower autonomous system number.C. Router R1 will be preferred because it has a lower local preference.D. Router R2 will be preferred because it has a higher local preference.E. Router R1 will be preferred because its nei ghbor has the higher autonomous system number.F. Router R1 will be preferred because it has the lower neighbor IP address.
A company has a small network,consisting of a single switch and a single router.The switch has been configured with two vlans,and route-on-a-stick is being configured on the router for inter-vlan routing.A trunk is configured to connect the switch to the router.What is the minimum number of router subinterfaces that are required for all the vlans to communicate?（）A. oneB. threeC. twoD. zero
Refer to the exhibit. Given the output shown from this Cisco Catalyst 2950, what is the most likely reason that interface FastEthernet 0／10 is not the root port for VLAN 2?() A.This switch has more than one interface connected to the root network segment in VLAN 2.B.This switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree.C.This switch interface has a higher path cost to the root bridge than another in the topology.D.This switch has a lower bridge ID for VLAN 2 than the elected designated switch.
Refer to the exhibit. Based on the information given. Which switch will be elected root bridge and why?() A.Switch A ,because it has the lowest MAC addressB.Switch C,because it has the lowest priorityC.Switch B,because it has the highest MAC addressD.Switch C,because it is the most centrally located switchE.Switch A,because it is the most centrally located switchF.Switch D,because it has the highest priority
Switch R1 is configured with VTP. Which two VTP modes will make R1 capable of creating and deleting VLANs on itself？ （）A、 ClientB、 ServerC、 TransparentD、 Pass-throughE、 No-negotiate
The VLANs in switch R1 are being modified. Which of the following are updated in R1 every time a VLAN is modified？（）A、Configuration revision numberB、Configuration revision flag fieldC、Configuration revision reset switchD、Configuration revision databaseE、None of the other alternatives apply
Switch R1 has been configured with Private VLANs. With that type of PVLAN port should the default gateway be configured？（）A、 TrunkB、 IsolatedC、 PrimaryD、 CommunityE、 PromiscuousF、 None of the other alternatives apply
A VTP domain has six active VLANs. Without notice， all VLANs except VLAN1 fail. Just prior tothe failure， Switch2 was added to the network. Which three issues on Switch2 could be the cause？（）A、Switch2 is configured for only VLAN1B、Switch2 is a VTP server in a different domainC、Switch2 is a VTP server in the Company domainD、Switch2 is not a VTP domain.E、Switch2 has a lower VTP configuration revision number than the current VTP revisionF、Switch2 has a higher VTP configuration revision number than the current VTP revision
Router R1, an ASBR connected to the Internet and to backbone area 0, has been configured with a default - information originate command. Which of the following is true about the effects of this configuration command?（）A、R1 will always create and flood a default route into the OSPF domain.B、R1 will create and flood an LSA for prefix/length 0.0. 0.0/0 into the OSPF domain if R1's IP routing table has a route to 0.0.0.0/0.C、R1 will set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, regardless of whether R1 has a default route.D、R1 w ill set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, but only if R1 has a route to 0.0.0.0/0.
A cisco aironet 1020 controller-based access point has been connected to a catalyst 3550-24 pwr switch. however， when it is powered up， the access point fails. What has caused this problem？（）A、access point does not support 802.11hB、incorrect switch power supplyC、switch port is not enabledD、switch does not support 802.3afE、access point has not been initialized with the primary controller
The network administrator has discovered that the power supply has failed on a switch in the company LAN and that the switch has stopped functioning. It has been replaced with a Cisco Catalyst 2950 series switch.What must be done to ensure that this new switch becomes the root bridge on the network?（）A、One router is running RIPv1.B、RIP neighbor is 224.0.0.9.C、The network contains a loop.D、Network 10.10.1.0 is reachable.
Switch R1 is configured to use the VLAN Trunking Protocol （VTP）. What does R1 advertise in its VTP domain？（）A、The VLAN ID of all known VLANs，the management domain name，and the total number of trunk links on the switch.B、The VLAN ID of all known VLANs，a 1-bit canonical format （CF1 Indicator），and the switch configuration revision number.C、The management domain name，the switch configuration revision number，the known VLANs， and their specific parameters.D、A 2-byte TPID with a fixed value of 0x8100 for the management domain number，the switch configuration revision number，the known VLANs，and their specific parameters.E、None of the other alternatives apply.
The network administrator has discovered that the power supply has failed on a switch in the company LAN and that the switch has stopped functioning. It has been replaced with a Cisco Catalyst 2950 series switch. What must be done to ensure that this new switch becomes the root bridge on the network?（）A、Lower the bridge priority number.B、Change the MAC address of the switch.C、Increase the VTP revision number for the domain.D、Lower the root path cost on the switch ports.E、Assign the switch an IP address with the lowest value.
Switch R1 and R2 both belong to the Company VTP domain. What’s true about the switch operation in VTP domains？（）A、A switch can only reside in one management domainB、A switch is listening to VTP advertisements from their own domain onlyC、A switch is listening to VTP advertisements from multi domainsD、A switch can reside in one or more domainsE、VTP is no longer supported on Catalyst switches
A Cisco Aironet 1020 controller-based access point has been connected to a Catalyst 3550-24PWR Switch. However， when it is powered up， the access point fails. What has caused this problem？（）A、access point does not support 802.11hB、incorrect switch power supplyC、switch port is not enabledD、switch does not support 802.3afE、access point has not been initialized with the primary controller
A Cisco Aironet 1020 controller-based access point has been connected to a Catalyst 3550-24 PWRSwitch. However， when it is powered up， the access point fails. What has caused this problem？（）A、access point does not support 802.11hB、incorrect switch power supplyC、switch port is not enabledD、switch does not support 802.3afE、access point has not been initialized with the primary controller
Router R1 exists in an Enterprise that uses EIGRP as its routing protocol. The show ip route command output on router R1 lists the following phrase: "Gateway of last resort is 1.1.1.1 to network 2.0.0.0". Whic h of the following is most likely to have caused this output to occur on R1?（）A、R1 has been configured with an ip default- network 2.0.0.0 command.B、R1 has been configured with an ip route 0.0.0.0 0.0.0.0 1.1.1.1 command.C、R1 has been configured with an ip route 2.0.0.0 255.0.0.0 1.1.1.1 command.D、Another router has been configured with an ip default - network 2.0.0.0 command.E、Another router has been configured with an ip route 2.0.0.0 255.0.0.0 1.1.1.1 command.
A company has a small network,consisting of a single switch and a single router.The switch has been configured with two vlans,and route-on-a-stick is being configured on the router for inter-vlan routing.A trunk is configured to connect the switch to the router.What is the minimum number of router subinterfaces that are required for all the vlans to communicate?（）A、oneB、threeC、twoD、zero
单选题Switch R1 has been configured with Private VLANs. With that type of PVLAN port should the default gateway be configured？（）A TrunkB IsolatedC PrimaryD CommunityE PromiscuousF None of the other alternatives apply
单选题Switch R1 is configured to use the VLAN Trunking Protocol （VTP）. What does R1 advertise in its VTP domain？（）AThe VLAN ID of all known VLANs，the management domain name，and the total number of trunk links on the switch.BThe VLAN ID of all known VLANs，a 1-bit canonical format （CF1 Indicator），and the switch configuration revision number.CThe management domain name，the switch configuration revision number，the known VLANs， and their specific parameters.DA 2-byte TPID with a fixed value of 0x8100 for the management domain number，the switch configuration revision number，the known VLANs，and their specific parameters.ENone of the other alternatives apply.
单选题A company has a small network，consisting of a single switch and a single router.The switch has beenconfigured with two vlans，and route-on-a-stick is being configured on the router for inter-vlan routing.Atrunk is configured to connect the switch to the router.What is the minimum number of router subinterfacesthat are required for all the vlans to communicate？（）AoneBthreeCtwoDzero
单选题Two directly connected routers， R1 and R2， are both configured for OSPF graceful restart. R2 is able to switch packets in hardware， but R1 is not. If a network administrator logs on to R2 and performs a system reload， which will be the result？（）ATraffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload.BR2 will continue to forward traffic to R1， but R1 will drop the traffic because its neighbor adjacency with R2 has failed.CR2 will continue forwarding traffic to and through R1， but R1 will drop this traffic because it is not capable of maintaining its forwarding state.DAll the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.
单选题The network administrator has discovered that the power supply has failed on a switch in the company LAN and that the switch has stopped functioning. It has been replaced with a Cisco Catalyst 2950 series switch. What must be done to ensure that this new switch becomes the root bridge on the network？（）A Lower the bridge priority number.B Change the MAC address of the switch.C Increase the VTP revision number for the domain.D Lower the root path cost on the switch ports.E Assign the switch an IP address with the lowest value.
单选题You want to configure switch R1 to propagate VLAN information across the Company network using VTP. What must be configured on a Cisco switch in order to advertise VLAN information？（）AVTP modeBVTP passwordCVTP revision numberDVTP pruningEVTP domain nameFNone of the other alternatives apply
多选题Switch R1 is configured with VTP. Which two VTP modes will make R1 capable of creating and deleting VLANs on itself？ （）AClientBServerCTransparentDPass-throughENo-negotiate
多选题Switch R1 and R2 both belong to the Company VTP domain. What’s true about the switch operation in VTP domains？（）AA switch can only reside in one management domainBA switch is listening to VTP advertisements from their own domain onlyCA switch is listening to VTP advertisements from multi domainsDA switch can reside in one or more domainsEVTP is no longer supported on Catalyst switches
多选题The VLANs in switch R1 are being modified. Which of the following are updated in R1 every time a VLAN is modified？（）AConfiguration revision numberBConfiguration revision flag fieldCConfiguration revision reset switchDConfiguration revision databaseENone of the other alternatives apply