【多选题】
Which two statements about routed firewall mode are true ？___
A. The firewall acts as a routed hop in the network
B. This mode conceals the presence of the firewall
C. The firewall requires a unique iP address for each interface
D. This mode allows the firewall to be added to an existing networ k with minimal additional configuration By default， this mode permits most traffic to pass throug
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相关试题
【多选题】
Which two statements describe DHCP spoofing attacks？___
A. They are used to perform man-in- the-middle attacks
B. They can access most network devices
C. They can modify the flow of traffic in transit. LNGKAIG
D. They protect the identity of ti attacker by masking the DHCP address
E. They can physically modify the network gateway
【多选题】
Which two types of VLANs using PVLANs are valid？___
A. isolated
B. promiscuous
C. backup
D. secondary
E. community
【多选题】
What are two limitations of the self-zone policies on a zone-based firewall？___
A. They are unable to block Https traffic
B. They restrict SNMP traffic.
C. They are unable to support Https traffic
D. They are unable to implement application inspection
E. They are unable to perform rate limiting
【多选题】
Which two descriptions of TACACS+ are true？ ___
A. The TACACS+ header is unencrypted
B. It combines a uthentication and authorization
C. It uses TCP as its transport protocol
D. Only the password is encrypted.
E. It uses UDP as its transport protocol.
【多选题】
Which two actions does an IPS perform？ ___
A. it spans the traffic
B. it reflects the traffic back to the sender
C. it encrypts the traffic
D. it terminates the user session or connection of the attacker
E. it reconfigures a device to block the traffic
【多选题】
In which form of fraud does an attacker try to learn information such as login credenti account information by ma squerading as a reputable entity or person in email， IM or communication channels ?___
A. phishing
B. Smurfit
C. Hacking
D. Identity Spoofing
【多选题】
Which two ESA services are available for incoming and outgoing mails ？___
A. anti-DoS
B. reputation filter
C. antispam
D. content filter
E. DLP
【多选题】
What are two reasons to recommend SNMPv 3 over SNMPv2？___
A. SNMPv3 is secure because you can configure authe ntication and privacy
B. SNMPv3 is insecure because it send in formation in clear text
C. SNMPv2 is insecure because it send information in clear text
D. SNMPv3 is a Cisco proprietary protocol
E. SNMPv2 is secure because you can configure authentication and privacy
【多选题】
Which two actions can a zone- based firewall apply to a packet as it transits a zone pair？___
A. drop
B. inspect
C. queue
D. quarantine
【单选题】
Which security principle has been violated if data is altered in an unauthorized manner？___
A. accountability
B. confidentiality
C. availability
D. integrity
【单选题】
Which IKE Phase 1 parameter can you use to require the site-to-site VPN to use a pre-shared ？___
A. encryption
B. authentication
C. group
【单选题】
Which command successfully creates an administrative user with a password of "cisco"on a Cisco router?___
A. username Operator privilege 7 password cisco
B. username Operator privilege 1 password cisco
C. username Operator privilege 15 password cisco
D. username Operator password cisco privilege 15
【单选题】
Which EAP method authenticates a client against Active Directory without the use of client-side 802.1X certificates？___
A. EAP-TLS
B. EAP-MSCHAPv2
C. EAP-PEAP
D.
E. AP-GTC
【单选题】
What is a limitation of network-based IPS？___
A. It must be in dividually configured to support every operating system on the network.
B. It is most effective at the in dividual host level
C. It is unable to monitor attacks across the entire netw ork
D. Large installations require numerous sensors to fully protect the network
【单选题】
When would you configure the ip dhcp snooping trust command on a sw itch？___
A. when the switch is connected to a DHCP server
B. when the switch is working in an edge capacit
C. when the switch is connected to a client system
D. when the switch is serving as an aggregator
【单选题】
How does the 802. 1x supplicant communicate with the authentication server？___
A. The supplicant creates EAP packets and sends them to the authenticator, which encapsulates them into RADIUS and forwards them to the authentication server.
B. The supplicant creates RADIUS packets and sends them to the authe nticator, which encapsulates the m into EAP and forwards them to the a uthentication server.
C. The supplicant creates RADIUS packets and sends them to the authenticator, which translates them into eap and forwards them to the a ut hentication server
D. The supplicant creates
E. AP packets and sends them to the authe nticator, which translates them into radius and forwards them to the authentication server.
【单选题】
Which command do you enter to verify the phase I status of a VPN connection？___
A. sh crypto se ssion
B. debug crypto isakmp
C. sh crypto isakmp sa
D. sh crypto ipsec sa
【单选题】
Refer to the exhibit. what is the e ffect of the given configuration？___
A. It enables authentication，
B. It prevents keychain authentication.
C. The two routers receive normal updates from one another.
D. The two device s are able to pass the message digest to one another.
【单选题】
Which command can you enter to configure OSPF to use hashing to authenticate routing updates？___
A. ip ospf aut hentication message-digest
B. neighbor 192 168.0 112 cost md5
C. ip ospf priority 1
D. ip ospf aut hentication-key
【单选题】
Which command can you enter to verify the status of Cisco lOS Resilient Configuration on a Cisco router?___
A. show secure bootset
B. secure boot-image
C. show binary file
D. ure boot-config
【单选题】
A user on your network inadvertently activates a botnet program that was received as an emai attachment. Which type of mechanism does Cisco Firepower use to detect and block only the botnet attack？___
A. network-based access control rule
B. reputation-based
C. user-ba sed access control rule
D. botnet traffic filter
【单选题】
What does the policy map do in CoPP？___
A. defines service parameters
B. defines packet selection parameters
C. defines the packet filter
D. define s the action to be performed
【单选题】
How is management traffic isolated on a Cisco ASR 1002？___
A. Traffic isolation is done on the vlan level
B. There is no management traffic isolation on a Cisco ASR 1002
C. Traffic is isolated based upon how you configure routing on the device
D. The management interface is configured in a special vRF that provides traffic isolation from the default routing table
【单选题】
Which statement about NaT table evaluation in the asa is true？___
A. After-auto NAT polices are appl d first
B. Manual NAT policies are applied first
C. the asa uses the most specific match
D. Auto NAT policies are applied first
【单选题】
Which information can you display by executing the show crypto ipsec sa command？___
A. ISAKMP SAs that are established between two peers
B. recent changes to the IP address of a peer router
C. proxy infor mation for the connection between two peers
D. IPsec SAs established between two peers
【单选题】
How can you prevent NAT rules from sending traffic to incorrect interfaces？___
A. Assign the output interface in the NAT statement
B. Add the no-proxy-arp command to the nat line.
C. Configure twice NAT instead o bject NAT. 5
D. Use packet-tracer rules to reroute misrouted NAT entries.
【单选题】
What term can be defined as the securing， control， and identification of digital data？___
A. cryptography
B. crypto key
C. cryptoanalysis
D. cryptology
【单选题】
Which feature in the dNS security module provide on and off network DNS protection？___
A. Data Loss Prevention
B. Umbrella
C. Real-time sandboxing
D. Layer-4 monitoring
【单选题】
Which a dverse consequence can occur on a network without BPDu guard ?___
A. The olde st switch can be elected as the root bridge
B. Unauthorized switches that are connected to the network can cause spanning-tree loops
C.
D. ouble tagging can cause the switches to experience CAM table overload.
【单选题】
What configuration is required for multitenancy ?___
A. shared infrastructure
B. multiple carriers
C. co-located resources
D. multiple separate zones
【单选题】
Why does ISE require its own certificate issued by a trusted CA？___
A. ISEs certificate allows guest devices to validate it as a trusted network device
B. It generates certificates for guest devices ba sed on its own certificate
C. It requests certificates for guest devices from the Ca server based on its own certificate.
D. ISE's certificate allows it to join the network security framework
【单选题】
which attack involves large numbers of ICMP packets with a spoofed source IP address？___
A. smurf attack
B. Teardrop attack
C. Nuke attack
D. SYN Flood attack
【单选题】
Which statement about interface and global access rules is true？___
A. Interface access rules are processed before global access rules.
B. Global access rules apply only to outbound traffic， but interface access rules can be applied in either direction
C. The implicit allow is proce ssed after both the global and interface access rules
D. If an interface access rule is applied， the global access rule is ignored
【单选题】
Which type of malicious software can create a back-door into a device or network？___
A. bot
B. worm
C. virus
D. Trojan
【单选题】
Which security term refers to the like lihood that a weakness will be exploited to cause damage to an asset？___
A. threat
B. risk
C. countermeasure
D. vulnerability
【单选题】
Which IPS detection method examines network traffic for preconfigured patterns？___
A. signature-based detection
B. honey-pot detection
C. anomaly-based detection
D. policy-based detection
【单选题】
What is an advantage of split tunneling ？___
A. It allows users with a VpN connection to a corporate network to access the internet with sending traffic across the cor porate network.
B. It allows users with a vpn connection to a corporate network to access the internet by using the vPN for security.
C. It protects traffic on the private network from users on the public network
D. It enables the VPN server to filter traffic more efficiently
【单选题】
Which IDS/IPS state misidentifies acceptable behavior as an attack ？___
A. false negative
B. true positive NEKA G
C. true negative
D. false positive
【单选题】
What is the maximum num ber of methods that a single method list can contain？___
A. 4
B. 3
C. 2
D. 5
【单选题】
Which command enables authentication at the oSPFv2 routing process level？___
A. ip ospf authentication message-digest
B. area 0 authentication message-digest
C. ip ospf message-digest-key 1 mds Cisco
D. area 0 authentication ipsec spi 500 md5 1234567890ABCDEF1234567890ABCDEF
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【单选题】
饱和蒸汽在同一压力下，经过过热器进一步吸收热量使其温度高于该压力下所对应的沸腾温度时，也就是（ ）不变，温度增高，此时的蒸汽即为过热蒸汽。___
A. 密度
B. 压力
C. 热值
D. 体积
【单选题】
由于变换反应是放热反应，适当降低温度有利于平衡向右移动，因此平衡常数随温度的降低而增大。当适当降低时，对于 CO 变换反应，CO 的含量___。
A. 降低
B. 升高
C. 不变
D. 先升后降
【单选题】
在甲醇热再生塔中用（ ）做气提介质，将溶解于甲醇中的 CO2、H2S、COS 全部解吸出来，达到富甲醇再生的目的。为了向硫磺回收装置提供合格的原料气，用易分离的甲醇蒸气做气提介质，是比较合理的。___
A. 低压氮气
B. 中压蒸汽
C. 甲醇蒸汽
D. 低压蒸汽
【单选题】
VPSA 单元均压降压过程，这是在吸附过程结束后，顺着吸附方向将塔内的较高压力的氢气放入其它已完成再生的较低压力吸附塔的过程，该过程不仅是降压过程，更是回收床层死空间（ ）的过程，本流程共包括了七次连续的均压降压过程，因而可保证氢气的充分回收。___
A. CO
B. H2
C. CH4
D. CO2
【单选题】
高压锅炉水经过 21FV00057 控制流量，进入V2101，该股水的作用是（ ）。___
A. 除去合成气携带的煤灰等杂质
B. 除去合成气中的 H2S
C. 除去合成气中的 NH3
D. 除去合成气中的 HCN
【单选题】
高压锅炉水经过 E2111 后分为两路，一路作为（ ），另外一路作为（ ）。___
A. T2101 洗涤水、T2401 洗涤水
B. R2102 入口补水，R2103 入口补水
C. V2101 洗涤水、水冷壁上水
D. 烧嘴冷却水罐补水、洗涤塔补水
【单选题】
低温甲醇洗装置冷区（指介质温度在 0℃以下）换热器冷、热介质投用的先后顺序是（ ）。___
A. 先投热介质，再投冷介质
B. 先投冷介质，再投热介质
C. 冷、热介质同时投
D. 只投冷介质，不投热介质
【单选题】
E2103 的压力控制方式为（ ）。___
A. 21PICA00012 单回路控制
B. 21PICA00026 单回路控制
C. 21PICA00012 分程控制
D. 21PICA00012 串级控制
【单选题】
E2103 建立正常液位后，打开底部煮炉蒸汽手阀，引蒸汽煮炉升温，通过调节手阀开度控制炉水升温速度不大于（ ）℃/h，直至炉水至沸腾状态。___
A. 25
B. 50
C. 75
D. 100
【单选题】
装置气密时对于变换变换单元，高压区的最终气密压力为（ ），开工循环气系统的最终气密压力为()，工艺凝液回收系统系统的最终气密压力为（ ）。___
A. 3.0、1.5、0.6
B. 4.0、1.0、0.6
C. 3.0、1.5、0.3
D. 4.0、1.0、0.3
【单选题】
若导气后出现严重超温，原则上：通过 T-2101 后放火炬压控阀 21PV00027，降低系统压力至0.2~0.3Mpag。快速（ ），气化单元相应通过合成气放火炬控稳系统压力。___
A. 关小 21HV00006 直至全关
B. 开大 21TV00008 直至全开
C. 开大 21HV00006 直至全关
D. 关小 21TV00008 直至全开
【单选题】
体积含量≤（ ）、变换气温度 21TI00045≤40℃时，变换气可输送至酸性气脱除单元。___。
A. 0.8%（V）
B. 1.5%（V）
C. 2.0%（V）
D. 3.0%（V）
【单选题】
原始开车时，低温甲醇洗单元在（ ）时必须投用喷淋甲醇，当外操通知内操流程已经改好，内操则需将 22FV00004 调节其开度控制流量。___
A. 导气中
B. 导气后一小时
C. 导气前一小时
D. 导气后半小时
【单选题】
汽提段，当 T2205 的汽提段集液盘建立 70％液位后，确认（ ）关闭，按操作规程启动 P2206，向 T2201 建立液位。___
A. 22XV00009、22XV00011
B. 22XV00009、22XV00012
C. 22XV00009、22XV00012
D. 22XV00010、22XV00012
【单选题】
低温甲醇洗循环降温时，开始由于甲醇和液态丙烯之间温差较大，液态丙烯会被很快蒸发，此时控制阀保持手动状态，通过控制进深冷器的液态丙烯量来控制系统的降温速率，系统降温初期的降温速率不大于（ ）（参考 T2204 塔底温度 22TI00046）。深冷器进液态丙烯后注意及时调整C2401 工况。___
A. 2℃／h
B. 10℃／h
C. 15℃／h
D. 20℃／h
【单选题】
低温甲醇洗循环降温时，为防止 T2204 塔底出口甲醇温度低至 E2218、T2205 最低设计温度 2℃，在投用丙烯深冷器之后，及时投用（ ），打开22FV00018，使低压蒸汽进入 E2227。调整 22FV00018开度，通过控制进入 E2227 的蒸汽量来控制 T2205 塔底的甲醇温度在（ ）℃。___
A. E2227、120
B. E2228、105
C. E2227、105
D. E2221、141.5
【单选题】
低温甲醇单元甲醇水分离塔开车成功后，采样分析 T2205 气提段集液盘甲醇组成，甲醇中水含量至少＜（ ）％（wt）为合格。___
A. 0.5
B. 1.0
C. 1.5
D. 2.0
【单选题】
低温甲醇洗单元导气调整平稳后，取样分析克劳斯气中硫化物浓度达到（ ）％之后，联系调度，打开 22PV00054，将克劳斯气改去硫磺装置，将 22PIC00054 给定（ ）MPa 投自动、22PIC00073给定（ ）MPa 投自动。___
A. 30、0.29、0.25
B. 25、0.25、0.29
C. 30、0.25、0.29
D. 35、0.25、0.29
【单选题】
当 T2201 塔出口工艺气温度达到－40℃，采样分析粗氢组成，当粗氢中总硫（H2S+COS）<（v/v），CO2＜（ ）（v/v）时，用粗氢置换 VPSA 界区阀阀前管线，粗氢可送至 VPSA 单元。___
A. 0.1×10-6、20×10-6
B. 0.5×10-6、20×10-6
C. 0.5×10-6、10×10-6
D. 1.0×10-6、20×10-6
