【单选题】
一个B类网络，有5位掩码加入缺省掩码用来划分子网，每个子网最多（ ）台主机___
A. 510
B. 512
C. 1022
D. 2046
E.
F.
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相关试题
【单选题】
一个domain中的System ID必须有相同的长度,是正确的么？ ___
【单选题】
一个Excel工作簿___
A. 只包括一个工作表
B. 只包括一个工作表和一个统计图
C. 最多包括三个工表
D. 包括l～225个工作表
E.
F.
【单选题】
一个Excel工作表最大的行号为( ) ___
A. 28
B. 256
C. 1024
D. 65536
E.
F.
【单选题】
一个Excel应用文档就是( )___
A. 一个工作表
B. 一个工作表和一个统计图
C. 一个工作簿
D. 若干个工作簿
E.
F.
【单选题】
一个VLAN可以称为是下面中的哪一个（ ）___
A. 广播域
B. 冲突域
C. 广播域和冲突域
D. 域名
E.
F.
【单选题】
当路由器接收的报文的目的 IP 地址在路由表中没有匹配的表项时，采取的策略是（ ）___
A. 丢掉该报文
B. 将该报文分片
C. 转发该报文
D. 如果缺省路由存在则按照缺省路由转发，否则丢弃
E.
F.
【单选题】
一个VLAN可以看作是一个（ ）___
A. 阻塞域
B. 冲突域
C. 广播域
D. 管理域
E.
F.
【单选题】
一个包含有华为等多厂商设备的交换网络，其VLAN中Trunk的标记一般应选___
A. IEEE 802.1Q
B. ISL
C. VLT
D. 以上都可以
E.
F.
【单选题】
一个工作表中的第5列编号为( ) ___
A. 5
B. E5
C. 5E
D. E
E.
F.
【单选题】
中兴F601支持以下哪种接口.（ ）___
A. WLAN
B. GE
C. E1
D. POTS
E.
F.
【单选题】
一个交换机收到数据包后首先进行的操作是( ) ___
A. 进行源MAC地址学习
B. 上送CPU查找路由表获得下一跳地址
C. 根据数据报文中的目的MAC地址查找MAC地址表
D. 用自己的MAC地址替换数据报文的目的MAC地址
E.
F.
【单选题】
一卡通系统使用CPU卡时，为了使系统更安全，通常各类终端设备中应内嵌___
A. 密钥母卡
B. PSAM卡
C. ID卡
D. SIMPASS卡
E.
F.
【单选题】
一台IP 地址为10.110.9.113/21主机在启动时发出的广播IP是（）___
A. 10.110.9.255
B. 10.110.15.255
C. 10.110.255.255
D. 10.255.255.255
E.
F.
【单选题】
一台PC申请了账号并采用ppp拨号方式接入CMNET后，该PC___
A. 拥有独立的IP地址
B. 没有独立的IP地址
C. 拥有固定的IP地址
D. 拥有移动公司主机的IP地址
E.
F.
【单选题】
一条短信通过短信网关提交到业务侧，网关首先写一条（ ），该条消息成功与否，在62话单中消息状态字段将赋值表示其状态，成功则为0，非0则失败，并产生相应的错误代码。___
A. MI话单
B. 62话单（MO话单）
C. 60话单（MT话单）
D. 61话单
E.
F.
【单选题】
一位系统管理员在安装Windows Server 2003的过程中，在安装向导的网络设置页面中选择了典型设置，那么当服务器安装完成后将其连接到公司的网络，它的IP地址会（ ）。（选择一项）___
A. 是192.168.0.1
B. 从公司的DHCP服务器自动获得
C. 是0.0.0.0
D. 是192.168.0.0/16网段的随机IP地址
E.
F.
【单选题】
依据《安全生产法》的规定，生产经营单位的建设项目的安全设施必须做到三同时，即生产经营单位新建、改建、扩建工程项目的安全设施，必须与主体工程（ ）___
A. 同时勘察、同时设计、同时施工
B. 同时施工、同时投入生产和使用
C. 同时设计、同时施工、同时投入生产和使用
D. 同时审批、同时设计、同时施工
E.
F.
【单选题】
当桥接收的分组的目的MAC地址，在桥的映射表中没有对应的表项时，采取的策略是()___
A. 其他选项都不对
B. 将该分组分片
C. 丢掉该分组
D. 向其他端口广播该分组
E.
F.
【单选题】
移动公司集团专线业务维护的目标是确保___
A. 移动公司网络正常
B. 客户内网正常
C. 客户能正常使用移动公司提供的服务
D. 以上都不是
E.
F.
【单选题】
移动网络无线技术GSM对于时钟频率精度的要求和时间同步的要求分别为（ ）___
A. 0.05ppm 3us
B. 0.05ppm 1.5us
C. 0.05ppm 1us
D. 0.05ppm NA
E.
F.
【单选题】
802.11、802.11b、802.11a、 802.11b 、802.11n的最高理论数率分别为（ ）___
A. 2Mbps、11 Mbps、 54 Mbps 、128 Mbps、300 Mbps
B. 2Mbps、11 Mbps、 54 Mbps 、128 Mbps、4500 Mbps
C. 2Mbps、11 Mbps、 54 Mbps 、54 Mbps、300 Mbps
D. 2Mbps、11 Mbps、 54 Mbps 、54 Mbps、600 Mbps
E.
F.
【单选题】
WDM系统是_____在波长段内使用（）___
A. 850nm
B. 1310n
C. 1550nm
D. 1532nm
E.
F.
【单选题】
网管服务中用于otnmping的是哪个服务（ ）___
A. manager2.exe
B. monitor.exe
C. dtserver.exe
D. dtdumper.exe
E.
F.
【单选题】
已知某个网络的掩码是255.255.248.0，那么下面属于同一网段的是（ ）___
A. 10.76.129.21和10.76.137.1
B. 10.33.23.2和10.33.31.1
C. 10.52.57.34和10.52.62.2
D. 10.110.16.1和10.110.25.1
E.
F.
【单选题】
以太网OAM三种检测机制不包括以下哪种（ ）___
A. CC
B. LT
C. LB
D. FFD
E.
F.
【单选题】
以太网交换机的每一个端口可以看做一个（ ）___
A. 冲突域
B. 广播域
C. 管理域
D. 阻塞域
E.
F.
【单选题】
以太网交换机端口A配置成10/100M自协商工作状态，与10/100M自协商网卡连接，自协商过程结束后端口A的工作状态： ___
A. 10M半双工
B. 10M全双工
C. 100M半双工
D. 100M全双工
E.
F.
【单选题】
以太网透传电路，客户对接设备均为二层交换机，以下哪项表述是正确的___
A. 测试点只能选择在总部
B. B.只能在总部采用查端口法进行故障排除
C. C.可在分支进行挂表
D. D.不能在总部进行挂表测试
E.
F.
【单选题】
以太网网段中的主机发生冲突时，为何要在尝试传输帧之前随机延迟？ ___
A. 随机延迟旨在确保无冲突链路
B. 每台设备的随机延迟值由制造商指定。
C. 网络设备厂商之间无法就标准的延迟值达成一致。
D. 延迟有助于防止站点在传输期间再次发生冲突。
E.
F.
【单选题】
以太网无源光网络（EPON）是一种采用（ ）结构的单纤双向光接入网络___
A. 点到点
B. 点到多点
C. 环形
D. 总线型
E.
F.
【单选题】
以太网中，是根据（ ）地址来区分不同的设备的.___
A. IP地址
B. LLC地址
C. IPX地址
D. MAC地址
E.
F.
【单选题】
PPP中的NCP（网络控制协议）实现以下哪种功能（ ）___
A. 把分组转变成信元
B. 建立连接
C. 建立链路
D. 封装多种协议
E.
F.
【单选题】
电子邮件应用程序实现SMTP的主要目的是（）___
A. A.服务攻击
B. B.反射攻击
C. C.拒绝服务攻击
D. D.重放攻击
E.
F.
【单选题】
网管服务中用于向设备采集数据的是哪个服务（ ）___
A. manager2.exe
B. monitor.exe
C. dtserver.exe
D. dtdumper.exe
E.
F.
【单选题】
以太网自动协商的主要功能就是使物理链路两端的设备通过交互信息自动选择同样的工作参数。自动协商的内容主要包括( )、运行速率以及流控等参数. ___
A. IP地址
B. 物理介质
C. VLAN ID
D. 双工模式
E.
F.
【单选题】
以下DSP参数与传真业务无关的是( )___
A. 回音抑制
B. 静音压缩
C. 抖动增益
D. 语音编码方式
E.
F.
【单选题】
以下IP组播MAC地址描述正确的是（ ）___
A. MAC地址只有高24位固定
B. 32位IP组播地址空间映射到MAC地址的低32位
C. IP组播地址中低28位空间映射到MAC地址的低28位
D. IP组播地址中低23位映射到MAC地址的低23位
E.
F.
【单选题】
以下RAID安全性最高的是___
A. RAID0
B. RAID1
C. RAID2
D. RAID3
E.
F.
【单选题】
以下Windows命令中，可以用于测试网络通断的命令是___
A. ping
B. arp-a
C. tracert
D. telnet
E.
F.
【单选题】
以下Windows命令中，可以用于查看系统MAC地址的命令是___
A. ping
B. arp-a
C. tracert
D. telnet
E.
F.
推荐试题
【单选题】
Which command do you enter to verify the status and settings of an iKE Phase 1 tunnel？___
A. show crypto ipsec as output
B. show crypto isakmp
C. show crypto isakmp policy
D. show crypto ipsec transform
【单选题】
Which feature can help a router or switch maintain packet forwarding and protocol states despite an attack or heavy traffic load on the router or switch？___
A. service Policy
B. Control Plane Policing
C. Policy Map
D. Cisco
E. xpress
F. orwarding
【单选题】
Which STP feature can prevent an attacker from becoming the root bridge by immediately shutting down the interface when it receives a BPDU？___
A. root guard
B. Port Fast
C. BPDU guard
D. BPDU filtering
【单选题】
Which technology can best protect data at rest on a user system？___
A. full-disk encryption
B. IPsec tunnel
C. router ACL
D. network IPS
【多选题】
Which two primary security concerns can you mitigate with a BYOD solution ？___
A. schedule for patching the device
B. securing access to a trusted corporate network
C. compliance with applicable policies
D. connections to public Wi-Fi networks
E. device tagging and invento
【多选题】
choose five___
A. MD5————————inserure
B. DES————————insercure
C. SDES———————legacy
D. SHA-1———————legacy
E. HMAC-MD5—————legacy
【多选题】
Which two characteristics of symmetric encryption are true？___
A. It uses digital certificates
B. It requires more resources than asymmetric ancryption
C. It uses the same key to enctypt and decrupt traffic
D. It uses a public key and a pricate key to encrypt and decrypt traffic.
E. It is faster than asymmetric encryption
【多选题】
which two characteristics of PVLAN are true？___
A. Promiscuous porta can communicate with PVLAN ports.
B. Isolated ports cannot communicate with other ports on the same VLAN
C. Community ports have to be a part of the trunk.
D. They require VTP to be enabled in server mode
E. PVLAN ports can be configured as Ether Channel ports
【多选题】
What are two options for running Cisco SDM?___
A. Running SDM from a mobile device
B. Running SDM from within CiscoWorks
C. Running SDM from a router's flash
D. Running SDM from the Cisco web porta
E. Running SDM from a PC
【多选题】
Which two options are the primary deployment modeles for mobile device management？___
A. multisite
B. cloud-based
C. on premises
D. hybrid cloud basedo
E. single site
【多选题】
Drag the recommendation on the left to the Cryptographic algorithms on the right， Options will be used more than once.___
A. Avoid——————————————DES，MD5
B. Legacy——————————————SDES，SHA1，HMAC-MD5
【多选题】
Which two are valid types of vLans using PVLANS ?___
A. Community VLAN
B. Backup VLAN
C. Secondary VLAN
D. Isolated VLAN
E. Isolated VLAN
【多选题】
Which two commands are used to implement Resilient lOS Configuration ___
A. Secure boot-config
B. copy running-config tftp
C. copy flash:ios bin tftp
D. copy running-config startup-config
E. secure boot-image
【多选题】
Which two types of firewalls work at layer 4 and above ？___
A. Stateful inspection
B. Network Address Translation
C. Circuit-Level gateway
D. Static packet filter
E. Application Level firewall
【多选题】
Which two default settings for port security are true ？___
A. Violation is Protect
B. Violation is Restrict
C. Violation is Shutdown
D. Maximum number of MAC addresses is 2
E. Maximum number of MAC addresses is 1
【多选题】
Which two are characteristics of RADIUS？___
A. Uses UDP ports 1812 /1813
B. Uses TCP port 49
C. Uses UDP port 49
D.
E. ncrypts only the password between user and server
【多选题】
When setting up a site-to-site VPN with PSK authentication on a Cisco router， which two elements must be configured under crypto map？___
A. pfs
B. nat
C. reverse route
D. peer
E. transform-set
【多选题】
When using the Adaptive Security Device Manager（ASDM), which two options are available to add a new root certificate？___
A. Install from SFTP server
B. Usehttps
C. Install from a file
D. Use LDAP
E. Use SCEP
【多选题】
Which two SNMPv3 services support its capabilities as a secure networ k manage protocol？ ___
A. access control
B. the shared secret key
C. authentication
D. authorization
E. accounting
【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
【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
