刷题
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【多选题】
choose four___
A. DHCP snooping ——————————blocks DHCP messages
B. Dynamic ARP inspection——————verifies IP-to-MAC traffic on untrusted ports
C. IP sources guard ——————————provides layer 2 interface security with ports ACLs
D. Port security————————————mitigates MAC-address spoofing at the access interface
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答案
ABCD
解析
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相关试题
【多选题】
choose four___
A. Step1————————run the system setup wizard
B. Step2————————add an authentication realm
C. Step3————————configure identity management
D. Step4————————configure directory group
【多选题】
What are two advanced features of the Cisco AMp solution for endpoints ___
A. contemplation
B. foresight
C. sandboxing
D. reputation
E. reflection
【多选题】
Which two characteristics of RADIUS are true?___
A. It encrypts only the password between user and server.
B. It uses TCP ports 1812/1813
C. It uses UDP ports 1812/1813.
D. It uses UDP port 49
E. It uses TCP port 49
【多选题】
What are two challenges of using a network-based IPS? ___
A. It is unable to determine whether a detected attack was successful
B. It requires additional storage and proce ssor capacity on syslog servers
C. As the network expands, it requires you to add more sensors.
D. It is unable to detect attacks across the entire network
E. It must support multiple operating systems.
【多选题】
What are two default be haviors of the traffic on a zone-based firewall?___
A. Traffic within the self -zone uses an im plicit deny all.
B. All traffic between zones is implicitly blocked
C. Communication is allowed between interfadAss that are members of the same zone
D. Communication is blocked between interfaces that are members of the same zone
E. The CBAC rules that are configured on router interfaces apply to zone interfaces
【多选题】
Which two advantages does the on-premise model for MDM deployment have over the cloud-based model?___
A. The on-premise model is easier and faster to de ploy than the cloud-based model
B. The on-premise model is more scalable than the cloud-based model
C. The on-premise model is generally less expensive than the cloud-based model
D. The on-premise model generally has less latency than the cloud- based model.
E. The on-premise model provides more control of the MDM solution than the cloud
【多选题】
Which two actions can an end usts take to manage a lost or stolen device in Cisco ISE? ___
A. Activate Cisco ISE End point Protection Services to quarantine the device.
B. Add the mac address of the device to a list of blacklisted devices
C. Force the device to be locked with a PIN
D. Request revocation of the digital certificate of the device.
E. Reinstate a device that the user previously marked as lost or stolen
【多选题】
Which two problems can arise when a proxy firewall serves as the gateway between networks?___
A. It can prevent content caching
B. It can limit application support
C. It is unable to prevent direct connections to other networks
D. It can cause reduced throughput.
E. It is unable to provide antivirus protection
【多选题】
When using the Adaptive Security Device Manager(ASDM), which two methods are available to add a new root certificate?___
A. Use sCep
B. Install from SFTP server
C. Install from a file
D. Use Https
E. Use LDAP
【多选题】
Which two are considered basic security principles?___
A. Accountability
B. Redundancy
C. High Availabilit
D. Integrity
E. Confidentiality
【多选题】
Which two roles of the Cisco WSA are true?___
A. IPS
B. firewall
C. antispam
D. web proxy
E. URL filter
【单选题】
Which next-generation encryption algorithm supports four variants?___
A. SHA-2
B. SHA-1
C. MD5
D. HMAC
【单选题】
What aims to remove the abil ity to deny an action?___
A. Non-Repudiation
B. Accountability
C. Integrity
D. Deniability
【单选题】
Which statements about the native VLAN is true ?___
A. It is susceptible to VLAN hopping attacks.
B. It is the Cisco recommended VLAN for switch-management traffic
C. It is most secure when it is a ssigned to vLAn 1.
D. It is the cisco-recomme nded vlan for user traffic
【单选题】
There are two versions of IKE:IKEv1 and IKEv2. Both IKEv1 and IKEv2 protocols operate in phases IKEv1 operates in two phases. IKEv2 operates in how many phases?___
A. 2
B. 3
C. 4
D. 5
【单选题】
What does the dh group refer to?___
A. length of key for hashing C
B. length of key for encryption
C. tunnel lifetime key
D. length of key for key exchange
E. length of key for authentication
【单选题】
Which path do you follow to enable aaa through the SDM ?___
A. Configure Tasks > AAA
B. Configure > Addition Authentication > AAA
C. Configure > AAA
D. Configure > Additional Tasks > AAA
E. Configure Authentication > AAA
【单选题】
which technology cloud be used on top of an MPLS VPN to add confidentiality ?___
A. IPsec
B. 3DES
C. AES
D. SSL
【单选题】
Which term is most closely aligned with the basic purpose of a SIEM solution? ___
A. Non-Repudiation
B. Accountability
C. Causality
D. Repudiation
【单选题】
You have just deployed SNMPv3 in your environment, Your manager asks you to make sure that our SNMP agents can only talk to the SNMP Manager. What would you configure on your SNMI agents to satisfy this request?___
A. A SNMP View containing the SNMP managers
B. Routing Filter with the SNMP managers in it applied outbound
C. A standard ACL containing the SNMP managers applied to the SNMP configuration
D. A SNMP Group containing the SNMP managers
【单选题】
Which feature prevents loops by moving a nontrunking port into an errdisable state when a BPDU is received on that port?___
A. BPDU filte
B. DHCP snooping
C. BPDU guard
D. Port Fast
【单选题】
Which command enables port security to use sticky MAC addresses on a switch?___
A. switchport port-security violation restrict
B. switchport port-security mac-address sticky
C. switchport port-security violation protect
D. switchport port-security
【单选题】
When you edit an IPS subsignature, what is the effect on the parent signature and the family of subsignatures?___
A. The change applies to the parent signature and the entire family of subsignatures
B. The change applies to the parent signature and the subsignature that you edit
C. The change applies only to subsignatures that are numbered sequentially after the subsignature that you edit
D. Other signatures are unaffected, the change applies only to the subsignature that you dit
【单选题】
Which type of mechanism does Cisco FirePOWER de ploy to protect ag detected moving across other networks?___
A. antivirus scanning
B. policy-based
C. reputation-based
D. signature-based
【单选题】
What action must you take on the ise to blacklist a wired device?___
A. Locate the switch through which the device is connected and push an a cl restricting all access by the device
B. Issue a CoA request for the de vice's mac address to each access switch in the network
C. Revoke the device's certificate so it is unable to authenticate to the network
D. Add the device's MAc address to a list of black listed devices
【单选题】
Which type of firewall can perform deep packet inspection?___
A. packet-filtering firewall
B. stateless firewall
C. application firewall
D. personal firewall
【单选题】
What is the main purpose of Control Plane Policing?___
A. to prevent exhaustion of route-proce ssor resources
B. to organize the egress packet queues
C. to define traffic classes
D. to maintain the policy map
【单选题】
Which attack can be prevented by OSPF authentication?___
A. smurf attack
B. IP spoofing attack
C. denial of service attack
D. buffer overflow attack
【单选题】
What is the best definition of hairpinning?___
A. ingress traffic that traverses the outbound interface on a device
B. traffic that enters one interface on a device and that exits through another interface
C. traffic that enters and exits a device through the same interface
D. traffic that tunnels through a device interface
【单选题】
Which SNMPv3 security level provides authentication using HMAC with MD5, but does not use encryption?___
A. authPriv
B. authNo Priv
C. noAuthNoPriv
D. NoauthPriv
【单选题】
You have implemented a dynamic blacklist, using security intelligence to block illicit network activity. However, the blacklist contains several approved connections that users must access for usiness pur poses. Which action can you take to retain the blacklist while allowing users to access the approve d sites?___
A. Create a whitelist and manually add the approved addresses.
B. Disable the dynamic blacklist and deny the specif ic address on a whitelist while permitting the others
C. Edit the dynamic blacklist to remove the approved addresses
D. Disable the dynamic blacklist and create a static blacklist in its place
【单选题】
When connecting to an external resource,you must change a source IP address to use one IP address from a range of 207.165.201.1 to 207.165.1.30. Which option do you implement ?___
A. dynamic source NAT that uses an IP ad dress as a mapped source
B. static destination NAT that uses a subnet as a real de stination
C. dynamic source NAT that uses a range as a mapped source
D. static destination NAT that uses a subnet as a real source
【单选题】
Refer to the exhibit. 【nat(ins,any)dynamic interface】Which ty pe of NaT is configured on a Cisco ASA?___
A. dynamic NAT
B. source identity NAT
C. dynamic PAT
D. identity twice NAT
【单选题】
Which mitigation technology for web-based threats prevents the removal of confidential data from the network?___
A. CTA
B. DCA
C. AMP
D. DLP
【单选题】
Refer to the exhibit. What is the effect of the given configuration?___
A. It establishes the preshared key for the switch
B. It establishes the preshared key for the firewall.
C. It establishes the preshared key for the Cisco ISE appliance
D. It establishes the preshared key for the router.
【多选题】
What are two major considerations when choosing between a SPAN and a TAP when plementing IPS?___
A. the type of analysis the iS will perform
B. the amount of bandwidth available
C. whether RX and TX signals will use separate ports
D. the way in which media errors will be handled
E. the way in which dropped packets will be handled
【多选题】
What are two direct-to-tower methods for redirecting web traffic to Cisco Cloud Web Security?___
A. third-party proxies
B. Cisco Catalyst platforms
C. Cisco NAC Agent
D. hosted PAC files
E. CiSco ISE
【多选题】
Which three descriptions of RADIUS are true? ___
A. It uses TCP as its transport protocol.
B. Only the password is encrypted
C. It supports multiple transport protocols
D. It uses UDP as its transport protocol
E. It combines authentication and authorization
F. It separates authentication,authorization,and accounting
【多选题】
Which two configurations can prevent VLAN hopping attack from attackers at VLAN 10?___
A. using switchport trunk native vlan 10 command on trunk ports
B. enabling BPDU guard on all access ports
C. creating VLAN 99 and using switchport trunk native vlan 99 command on trunk ports
D. applying ACl between VLAN
E. using switchport mode access command on all host ports
F. using switchport nonegotiate command on dynamic desirable ports
【多选题】
What are two features of transparent firewall mode ___
A. It conceals the presence of the firewall from attackers
B. It allows some traffic that is blocked in routed mode
C. It enables the aSA to perform as a router.
D. It acts as a routed hop in the network.
E. It is configured by default
推荐试题
【多选题】
断路器出现___异常时应停电处理。
A. 油断路器渗油;
B. SF6断路器的气室严重漏气发出操作闭锁信号;
C. 真空断路器真空损坏;
D. 液压机构的断路器液压突然失压到零;
【多选题】
高压断路器按灭弧介质不同有___。
A. 压缩空气断路器;
B. 少油.多油断路器;
C. SF6断路器;
D. 真空断路器;
【多选题】
GIS母线共相式与分相式比较主要优点___。
A. SF6气体密封件用具小;
B. 气室隔板少,故障率低;
C. 电场优化较好;
D. SF6气体使用量大;
【多选题】
GIS母线共相式与分相式比较主要优点___。
A. SF6气体密封件用具小;
B. 气室隔板少,故障率低;
C. 电场优化较好;
D. SF6气体使用量大;
【多选题】
隔离开关与断路器的联锁机构的结构特点是___。
A. 断路器断开后,隔离开关才能打开;
B. 隔离开关断开后,断路器才能打开;
C. 断路器闭合后,隔离开关才能闭合;
D. 隔离开关闭合后,断路器才能闭合;
【多选题】
电压互感器是供给___用电的电源设备。
A. 继电保护;
B. 自动装置;
C. 测量仪表电流线圈;
D. 测量仪表电压线圈;
【多选题】
电压互感器的二次回路通电试验时,为防止由二次侧向一次侧反充电,除应将二次回路断开外,还应取下电压互感器___或断开电压互感( )。
A. 高压熔断器;
B. 一次刀闸;
C. 引线;
D. 避雷器;
【多选题】
电压互感器正常巡视的项目有___。
A. 瓷件有无裂纹损坏或异音放电现象;
B. 检查温度计是否正常工作;
C. 接线端子是否松动;
D. 电压指示无异常;
【多选题】
下列对电压互感器描述正确的是___。
A. 10kV电压互感器一次侧熔断器熔丝的额定电流是0.5A;
B. 电压互感器一次侧熔丝熔断后不允许用普通熔丝代替由于不能满足断流容量要求;
C. 若电压互感器二次侧熔丝容量选择不合理,有可能造成一次侧熔丝熔断;
D. 110KV的电压互感器采用石英砂填充的熔断器具有较好的灭弧性能和较大的断
【多选题】
电流互感器应在___方式下运行。
A. 电流互感器不得超额定容量长期运行;
B. 电流互感器二次侧电路应始终闭合;
C. 电流互感器二次侧线圈的一边和铁芯应同时接地;
D. 电流互感器二次侧线圈应能耐受高压;
【多选题】
电压互感器正常巡视的项目有___。
A. 瓷件有无裂纹损坏或异音放电现象;
B. 检查温度计是否正常工作;
C. 接线端子是否松动;
D. 电压指示无异常;
【多选题】
蓄电池在使用中应避免的是___。
A. 过量放电;
B. 过量充电;
C. 大电流充.放电;
D. 低温放电;
【多选题】
运行中的电流互感器发生不正常音响的原因有___。
A. 电流互感器过负荷;
B. 二次侧开路;
C. 二次侧短路;
D. 内部绝缘损坏发生放电;
【多选题】
电容器停电后,放电电阻自行放电放不尽的主要原因是___。
A. 电容器容量大;
B. 引线接触不良;
C. 熔丝熔断;
D. 电容器内部断线;
【多选题】
在电力系统中通常采用并联电容是为了___。
A. 提高无功功率;
B. 提高有功功率;
C. 减少线损;
D. 提高供电电压;
【多选题】
电容器具有___性能。
A. 隔断交流电;
B. 隔断直流电;
C. 通过直流电;
D. 通过交流电;
【多选题】
使用变频器应注意的事项有___。
A. 变频器输入端要尽量装接断路器;
B. 变频器输出端尽量装设接触器;
C. 变频器输出端要尽量装设电涌抑制器;
D. 面板上的CHARGE灯熄灭后方可进行检修;
【多选题】
消弧线圈送电规定___。
A. 消弧线圈投用前不需测量绝缘电阻;
B. 消弧线圈应在所属变压器投运后投入;
C. 消弧线圈投用必须是在系统无单相接地时;
D. 合上消弧线圈隔离开关后必须检查刀闸接触良好;
【多选题】
消除铁磁谐振过电压方法有___。
A. 拉合断路器,改变运行方式,投入母线,改变接线方式;
B. 投入母线上的备用变压器或所用变压器;
C. 将TV二次回路短接;
D. 投.切电容器或电抗器;
【多选题】
倒停母线时切母联断路器应注意___。
A. 对要停电的母线再检查一次,确认设备已全部倒至运行母线上;
B. 切母联断路器前,检查母联断路器电流表应指示为零;
C. 切母联断路器后,检查停电母线的电压表应指示零;
D. 先拉电压互感器,后切母联断路器;
【多选题】
单母线接线的10kV系统发生单相接地后,经逐条线路试停电查找,接地现象仍不消失可能是___原因。
A. 两条线路同时同相接地;
B. 消弧线圈有接地;
C. 站内母线设备接地;
D. 主变线圈有接地;
【多选题】
可能是___原因。
A. 两条线路同时同相接地;
B. 消弧线圈有接地;
C. 站内母线设备接地;
D. 主变线圈有接地;
【多选题】
判别母线失电的依据是同时出现___现象。
A. 该母线的电压表指示消失;
B. 该母线的出线负荷均消失;
C. 该母线所供的所用电失电;
D. 母线差动保护动作;
【多选题】
以下属于旁路母线接线方式的是___。
A. 专用旁路断路器;
B. 双母线接线方式;
C. 母联断路器兼做旁路断路器;
D. 分段断路器兼做旁路断路器;
【多选题】
变频器按逆变器控制方式分有___。
A. U/f控制方式变频器;
B. 转差频率控制方式;
C. 矢量控制方式;
D. 电流源变频装置;
【多选题】
运行中断路器发生误跳闸应作___处理。
A. 若因由于人员误碰,误操作或机构受外力振动,保护盘受外力振动引起自动脱扣而"误跳"应不经汇报立即送电;
B. 若保护误动可能整定值不当或流变.压变回路故障引起的,应查明原因后才能送电;
C. 二次回路直流系统发生两点接地(跳闸回路接地)引起应及时排除故障;
D. 对于并网或联络线断路器发生"误跳"时应立即送电;
【多选题】
保护装置"交流电压断线"时装置会___。
A. 发"PT断线"异常信号;
B. 退出零序保护;
C. 退出距离保护;
D. 退出纵联保护;
【多选题】
继电保护装置信号回路的特点是___。
A. 交流.直流回路分开;
B. 信号回路与控制回路分开;
C. 继电保护信号不作用于跳闸;
【多选题】
母线保护的死区一般是在___。
A. 母联断路器与母联电流互感器之间;
B. 线路断路器与线路电流互感器之间;
C. 分段断路器与分段电流互感器之间;
D. 母线上;
【多选题】
三段式电流保护中,对延时电流速断保护的要求有___。
A. 任何情况下能保护线路全长;
B. 具有足够的灵敏性;
C. 力求动作时限最小;
D. 作为下一级线路全长的后备保护;
【多选题】
故障录波通常录___。
A. 电压量;
B. 电流量;
C. 开关量;
D. 高频信号量;
【多选题】
变压器只有轻瓦斯保护动作的原因可能是___。
A. 过负荷;
B. 相间短路;
C. 绕组匝间短路;
D. 油位下降;
【多选题】
在___情况下需要将运行中的变压器差动保护停用。
A. 差动二次回路及电流互感器回路有变动或进行校验时;
B. 测定差动保护相量图及差压和不平衡电流;
C. 差动电流互感器一相断线或回路开路时;
D. 差动误动跳闸后或回路出现明显异常时;
【多选题】
在下述___情况下,变压器零序电流保护的整定电流可能启动。
A. 当电力系统出现不平衡运行时;
B. 空投变压器时;
C. 三相断路器合闸不同期时;
D. 非并列运行断路器三相接触电阻不相同时;
【多选题】
通常的母线保护包括___。
A. 一相不完全式;
B. 两相不完全式;
C. 三相完全式;
D. 横差回路;
【多选题】
变电站综合自动化系统中微机继电保护主要包括___。
A. 输电线路保护;
B. 电力变压器保护;
C. 母线保护;
D. 直流屏保护;
【多选题】
综合自动化变电所前台机的主要巡视检查内容有___。
A. 液晶显示是否正常;
B. 液晶循环显示遥测量与实际一次值.压板状态.当期定值是否相符;
C. 路由器工作是否正常;
D. 保护是否动作;
【多选题】
变电站综合自动化系统的信息主要来源于___。
A. 一次信息;
B. 二次信息;
C. 监控装置;
D. 通信设备;
【多选题】
变电所综合自动化系统是由___组成的。
A. 系统保护单元(前置机).工作站(后台机);
B. 五防机.数据通信装置;
C. 变压器.高压断路器;
D. 高压断路器和隔离开关;
【多选题】
在距离保护中,为了监视交流回路,均装设“电压断线闭锁装置”,当二次电压回路短路或断线时,该装置___。
A. 发出信号;
B. 断开保护电源;
C. 断开保护正负电源;
D. 保护动作;
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