相关试题
【多选题】
CDMA前向容量受限最主要原因是（ ）受限。
【多选题】
软切换技术与硬切换技术相比，具有以下哪些优点？（ ）
A. 软切换进行过程中，移动台和基站均采用了分集接收的技术，有抵抗衰落的能力
B. 通信中断的概率大大降低
C. 软切换占用的系统资源更少，效率更高，网优过程中可通过提高软切换比例来增大容量
D. 进入软切换区域的移动台即使不能立即得到与新基站通信的链路，也可以进入切换等待的排队队列，从而减少了系统的阻塞率
【多选题】
在CDMA 1X系统中，下列（ ）消息，是由寻呼信道传送。
A. 接入参数消息
B. 系统参数消息
C. 信道列表消息
D. 切换指示消息
【多选题】
CDMA系统中 两个导频序列偏置的最小间隔是（ ）。
A. 1 Hz
B. second
C. 1 chip
D. 64chips
【多选题】
5 个用户通话 30 分钟换算为爱尔兰是多少？（ ）
【多选题】
可能采用的系统间干扰解决方法有：（ ）
A. 共天馈时减小天馈三阶互调产物
B. 调整定向天线的方向及位置
C. 降低干扰源功率
D. 加装滤波器
【多选题】
以下属于IPv6的数据类型有（ ）。
A. Multicast
B. Broadcast
C. Anycast
D. Singlecast
【多选题】
移动通信中常用的分集方式有（ ）。
A. 空间分集
B. 频率分集
C. 编码分集
D. 时间分集
【多选题】
无线传播的三种基本模式是反射．绕射．散射，下面关于反射．绕射．散射的说法正确的是（ ）
A. 当电磁波穿行的介质中存在小于波长的物体并且单位体积内阻挡体的个数非常巨大时，发生绕射
B. 当电磁波遇到比波长大得多的物体时发生反射
C. 当电磁波穿行的介质中存在小于波长的物体并且单位体积内阻挡体的个数非常巨大时，发生散射。
D. 当接收机和发射机之间的无线路径被物体的边缘阻挡时发生散射
【多选题】
地铁覆盖中，各运营商通过（ ）将信号合路到泄漏电缆上。
A. 功分器
B. 耦合器
C. 滤波器
D. POI
【多选题】
在专有承载建立过程中，S1上行GTPU隧道ID和S5下行GTPU隧道ID是由( )分配的。
A. PGW;
B. SGW;
C. HSS
D. MME
【多选题】
基于覆盖切换相关参数可分为以下几类？（ ）
A. 个性化切换补偿
B. 迟滞及定时器
C. 门限
【多选题】
LTE中，系统可能会通过下列( )信道，调度UE在PUSCH信道中上传数据。
A. PDCCH中的DCI3/3A
B. PHICH
C. PDCCH中的DCI0
D. PDSCH
【多选题】
TAC/TAU过程描叙正确的是 ：( )。
A. TAU过程一定要先进行随机接入，TAC内所有小区的PAGING数量是一样的
B. TAU只能在IDLE模式下发起，TAU分为普通TAU和周期性TAU
C. TAC是MME对UE移动性管理的区域，TAU可以在IDLE或CONNECT模式下发起
D. TAU是NAS层的过程，TAU过程不要先进行随机接入
【多选题】
假定小区输出总功率为46dBm，在2天线时，单天线输出功率是：( )。
A. 49dBm
B. 43dBm
C. 40dBm
D. 46dBm
【多选题】
LTE系统中，S1接口控制面传输网络层适配协议是( )。
A. UDP
B. TCP
C. RTSP
D. SCTP
【多选题】
Standalone场景中上行单用户峰值速率理论预期值为多少？（ ）
A. 20kbps
B. 15.625kbps
C. 100kbps
D. 8.25K
【多选题】
NB-IoT采用哪几种数据传输方案？（ ）
【多选题】
NB-IOT上行支持的子载波间隔是多少？（ ）
A. 12.5kHZ
B. 7.5kHZ
C. 15kHZ
D. 3.75kHZ
【多选题】
NB-SIB1的资源固定映射在几号子帧？（ ）
【多选题】
相比LTE，NB-IoT中物理信道有哪些？（ ）
A. NPDSCH
B. NPDCCH
C. NPUSCH
D. NPUCCH
【多选题】
NB-loT系统中，NPDCCH的调制方式为（ ）。
A. 8PSK
B. QPSK
C. 16QAM
D. BPSK
【多选题】
未来的车联网不仅包括车与网络之间的远程通信，还包括车车．车路．车人的频繁交互的短程通信，这些短程通信统称为？（ ）
A. V2E
B. V2N
C. V2X
D. V2A
【多选题】
基于SSB的NR测量，小区的信号质量除了由最好的beam合成这种情况外,其余情况取决于以下哪些因素？（ ）
A. maxNrofRSIndexesToReport
B. absThreshSS-BlocksConsolidation
C. reportQuantityRsIndexes
D. nrofSS-BlocksToAverage
【多选题】
5G 空中接口PDCP子层的功能包括（ ）。
A. 完整性保护．验证
B. RoHC
C. 加密．解密
D. PDCP SN维护与排序
【多选题】
UE最多监听多少个不同的DCI Format Size Per Slot？ （ ）
【多选题】
以下关于5G NR的RRC状态迁移，说法正确的是（ ）。
A. RRC_IDLE状态与RRC_CONNECTED状态可以双向转换
B. RRC_CONNECTED状态可以向RRC_INACTIVE状态转换
C. RRC_IDLE状态不可以向RRC_INACTIVE状态转换
D. RRC_IDLE状态可以向RRC_INACTIVE状态转换
【多选题】
CDMA属于干扰受限系统，无线干扰的增加可能影响到系统的（ ）
A. 呼叫成功率
B. 覆盖
C. 掉话率
D. 容量
【多选题】
1X中，前向各个公共和业务信道的功率分配取决于：（ ）
A. 用户分布
B. 传播损耗
C. 接收机噪声功率
D. 解调门限
【多选题】
根据伪随机码插入通信信道的位置不同可以得到下面哪些扩频调制方式。（ ）
A. 时跳变扩频
B. 调频扩频
C. 跳频扩频
D. 直序扩频
【多选题】
CDMA系统中前向同步信道使用的Walsh码为（ ）。
A. W（64，2）
B. W（64，1）
C. W（64，32）
D. W（64，0）
【多选题】
下面关于软切换的说法哪个不正确？（ ）
A. 在切换过程中，移动台开始与新的基站联系时，并不中断与原有的基站的通信
B. 通话保持在同一语音处理器上，通话中不存在中断现象
C. ,手机通话同时由多个扇区同时支持
D. 发生在相同或者不同CDMA载频内不同基站的扇区之间的切换,站联系时，并不中断与原有的基站的通信手机通话同时由多个扇区同时支持
【多选题】
CDMA2000 1x系统，移动台通话结束后会进入（ ）状态。
A. 重新登记
B. 初始化状态
C. ,重新鉴权
D. 空闲状态
【多选题】
室内有源分布系统中，维护时一般需要对以下器件进行性能测试（ ）。
A. 耦合器
B. 干线放大器
C. 功分器
D. 天线
【多选题】
电波在传播途径上遇到障碍物时，总是力图绕过障碍物，再向前传播，该现象称作 （ ）。
【多选题】
快衰落分为空间选择性快衰落,（ ）选择性快衰落和时间选址性快衰落。
【多选题】
室内覆盖使用的主要无源器件有： （ ）
A. 耦合器
B. 功分器
C. 合路器
D. 干放
【多选题】
关于基站天线的分集，哪些说法是正确的？（ ）。
A. 空间分集时要达到同样的效果，水平天线距离要大于垂直天线距离
B. 一般情况下空间分集增益要大于极化分集
C. 一般情况下极化分集增益要大于空间分集
D. 空间分集天线在安装调整时比极化天线困难的多
【多选题】
《中国电信移动通信网络运行维护规程（2015年试行版）》要求建立全程全网快速响应的运营服务体系，其中包含（ ）
A. 客户服务一体化
B. 网络维护集约化
C. 无线网优规范化
D. 现场维护综合化
推荐试题
【单选题】
Which component offers a variety of security Solution， including firwall， IF Antivirus and antiphishing features？___
A. Cisco loS router
B. Cisco ASA 5500 Ser ies security appliance
C. Cisco ASA 5500 X series Next Gen Security appliance
D. Cisco 4200 series IPS appliance
【单选题】
Refer to the exhibit， A Network Secur ity administrator check the ASa firewall NAT policy table rith show nat command， which statement is fails？___
A. There are only reverse translation matches for the REAL SERvER object
B. First policy in the Section 1 is a dynamic nat entry defined in the object configuration
C. NAT policy in section 2 is static entry de fined in the object configuration
D. Translation in Section 3 used when a connection does not matches any entries in first two sections
【单选题】
What is true of an aSa in transparent mode ?___
A. It supports OSPF
B. It requires an IP address for each interface
C. It requires a management IP address
D. It allows the use of dynamic NaT
【单选题】
What is the effect of the ip scp server enable command？___
A. It references an access list that allows specific SCP servers
B. It allows the router to initiate requests to an SCP server
C. It allows the router to become an SCP server
D. It adds SCP to the list of allowed copy functions
【单选题】
How can you mitigate attacks in which the attacker attaches more than one vLan tag to a packet？___
A. Assign an access VLAN to every active port on the switch
B. Disable Ether Channel on the switch
C. Explicitly identity each VLAN allowed across the trunk
D.
E. nable transparent VTP on the switch
【单选题】
Which technology can you implement to centrally mitigate potential threats when users on your network download files that might be malicious？___
A. Enable file-reputation services to inspect all files that traverse the company network and block files with low reputation scores
B. Verify that the compa ny IpS blocks all known malicious website
C. Verity that antivirus software is installed and up to date for all users on your network
D. Implement URL filtering on the perimeter firewall
【单选题】
What is the most common implementation of PaT in a standard networked environment？___
A. configuring multiple external hosts to join the self zo ne and to communicate with one another
B. configuring multiple internal hosts to communicate outside of the network using the outside interface IP address
C. configuring multiple internal hosts to communicate outside of the network by using the inside interface IP address
D. configuring an any any rule to enable external hosts to communicate inside the network
【单选题】
Which component of a bYod architecture provides aAa services for endpoint access ?___
A. Integrated Services Router
B. access point
C. ASA
D. Identity Services
E. ngine
【单选题】
You are configuring a NAT rule on a Cisco ASA ,Which description of a mapped interface is true?___
A. It is mandatory for all firewall modes
B. It is optional in routed mode
C. It is optional in transparent mode
D. It is mandatory for ide ntity NAT only
【单选题】
Which description of the use of a private key is true ？___
A. The sender signs a message using the receivers private key
B. The sender signs a message using their private key
C. The sender encrypts a message using the receivers private key
D. The receiver decrypts a n15ssage using the sender's private key
【单选题】
Which mechanism does the FireAMP Connector use to avoid conflicts with other security applications such as antivirus products ?___
A. Virtualization
B. Containers
C. Sandboxing
D.
E. xclusions
【单选题】
Which network to pology de scribes multiple LANS in a gec? ___
A. SOHO
B. MAN
C. pan
D. CAN
【单选题】
Which statement represents a difference between an access list on an aSa versus an access list on a router？___
A. The asa does not support number access lists
B. The aSa does not support standard access list
C. The asa does not ever use a wildcard mask
D. The asa does not support extended access lists
【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
