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【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.
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What term can be defined as the securing, control, and identification of digital data?___
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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.
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What configuration is required for multitenancy ?___
A. shared infrastructure
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Why does ISE require its own certificate issued by a trusted CA?___
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D. ISE's certificate allows it to join the network security framework
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which attack involves large numbers of ICMP packets with a spoofed source IP address?___
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【单选题】
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A. firewall
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On an ASA, which maps are used to identify traffic?___
A. Route maps
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What is the minimum Cisco lOS version that supports zone-based firewalls?___
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choose four___
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choose four___
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What are two advanced features of the Cisco AMp solution for endpoints ___
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Which two characteristics of RADIUS are true?___
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A. It is unable to determine whether a detected attack was successful
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【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
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Which two advantages does the on-premise model for MDM deployment have over the cloud-based model?___
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【多选题】
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When using the Adaptive Security Device Manager(ASDM), which two methods are available to add a new root certificate?___
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【多选题】
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A. 2
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【单选题】
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【单选题】
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【单选题】
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推荐试题
【单选题】
20TTL电路在正逻辑系统中,以下各种输入中___相当于输入逻辑“0”。
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【单选题】
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【单选题】
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【单选题】
23以下式子中正确的是___
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【单选题】
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B.
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D.
【单选题】
A+BC=___。
A. A+B
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【单选题】
26以下代码中为无权码的为___。
A. 5421BCD码
B. 8421BCD码
C. 余三码
【单选题】
一位十六进制数可以用___位二进制数来表示。
A. 4
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【单选题】
28十进制数25用8421BCD码表示为___。4位
A. 10 101
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【单选题】
29与十进制数(53.5)10不等值的数或代码为___。
A. (0101 0011.0101)8421BCD
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C. (110101.1)2
D. (60.4)8
【单选题】
30与八进制数(47.3)8等值的数为___
A. (100111.011)2
B. (97.3)16
C. (27.3 )16
D. (100111.11)2
【单选题】
31下列各型号中属于优先编码器是___。
A. 74LS85
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【单选题】
七段数码显示器BS202是___。
A. 共阳极LED管
B. 共阴极LED管
C. 共阳极LCD管
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【单选题】
33八输入端的编码器按二进制数编码时,其输出端的个数是___。
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【单选题】
四输入的译码器,其输出端最多为___。
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C. 10个
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【单选题】
当74LS148的输入端按顺序输入11011101时,输出为___。
A. 101
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【单选题】
用三线-八线译码器74LS138和辅助门电路实现逻辑函数Y=a2+a1a2,应___。
A. 用与非门,Y=y0y1y4y5y6y7
B. 用与门,Y=y2y3
C. 用或门,Y=y2+y3
D. 用或门,Y=y0+y1+y4+y5+y6+y7
【单选题】
37时序逻辑电路中一定包含___。
A. 触发器
B. 组合逻辑电路
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【单选题】
仅具有置“0”和置“1”功能的触发器是___。
A. 基本RS触发器
B. 钟控RS触发器
C. D触发器
D. JK触发器
【单选题】
由与非门组成的基本RS触发器不允许输入的变量组合为___。
A. 00
B. 01
C. 10
D. 11
【单选题】
40仅具有保持和翻转功能的触发器是___。
A. JK触发器
B. T触发器
C. D触发器
D. T' 触发器
【单选题】
触发器由门电路构成,但它不同于门电路功能,主要特点是___。
A. 具有翻转功能
B. 具有保持功能
C. 具有记忆功能
【单选题】
TTL集成触发器直接置0端[]和直接置1端[]在触发器正常工作时应___。
A. =1,=0
B. =0,=1
C. 保持高电平“1”
D. 保持低电平“0”
【单选题】
按逻辑功能的不同,双稳态触发器可分为___。
A. RS、JK、D、T等
B. 主从型和维持阻塞型
C. TTL型和MOS型
D. 上述均包括
【单选题】
同步计数器和异步计数器比较,同步计数器的显著优点是___。
A. 工作速度高
B. 触发器利用率高
C. 电路简单
D. 不受时钟CP控制。
【单选题】
把一个五进制计数器与一个四进制计数器串联可得到___进制计数器。
A. 4
B. 5
C. 9
D. 20
【单选题】
下列逻辑电路中为时序逻辑电路的是___ 。
A. 变量译码器
B. 加法器
C. 数码寄存器
D. 数据选择器
【单选题】
47N个触发器可以构成最大计数长度{进制数}为___ 的计数器。
A. N
B. 2N
C. N2
D. 2N
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N个触发器可以构成能寄存___位二进制数码的寄存器。
A. N-1
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49五个D触发器构成环形计数器,其计数长度为___。
A. 5
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C. 25
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【单选题】
同步时序电路和异步时序电路比较,其差异在于后者___。
A. 没有触发器
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C. 没有稳定状态
D. 输出只与内部状态有关
【单选题】
一位8421BCD码计数器至少需要___个触发器。
A. 3
B. 4
C. 5
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【单选题】
某电视机水平-垂直扫描发生器需要一个分频器将31500HZ的脉冲转换为60HZ的脉冲,欲构成此分频器至少需要___个触发器。
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【单选题】
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【单选题】
54多谐振荡器可产生 ___
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【单选题】
脉冲整形电路有___。
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【单选题】
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TTL单定时器型号的最后几位数字为___。
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555定时器不可以组成___。
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59以下各电路中,___可以产生脉冲定时。
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