填空题9. ______ works by creating a one-way hash out of a shared secret and sending this hash between source and destination. 在______中，发方根据共享密钥产生一个单向的散列函数，收方采用预配置的共享密钥计算该散列函数，以验证发方身份的真实性。
填空题 The Cisco DMVPN solution integrates NHRP, ______
填空题13. Role-based CLI access provides the ability to set up as many as ______ CLI views, which are configured to run commands that are configured for different job functions. 基于角色的CLI访问可以配置最多______种CLI视图供不同命令使用。
填空题7. The ______ and ______ do not both authenticate to the network at the same time. ______ authentication is only needed when the user logs off. 网络不必同时对______与______进行认证。用户注销后，采用______认证即可。
填空题6. ______ is a set of security protocols that work together to provide security to IP traffic while in transit. ______由一系列安全协议构成，用于保护IP流量在传输时的安全。
填空题1. Use individual P2P VPN peering only when the number of VPN connections is ______. 仅当VPN连接的数量______时采用点对点VPN隧道。
填空题 When the supplicant initiates the 802
填空题3. The default CAM aging timer on the Cisco Catalyst switch is ______. Cisco Catalyst交换机CAM表的默认老化时间为 ______ 。
填空题18. The five core reasons for intruding on a system or network include ______. 导致网络入侵的5个主要原因是______。
填空题 Unicast RPF can operate in ______ or ______ mode
填空题20. A ______ threshold is triggered when the CPU utilization exceeds a configured threshold. 当CPU使用率高于某个预设值一段时间后，将触发______阈值。
填空题20. By distributing ______ across multiple key servers and controlling the order of the key servers in the configurations, some load balancing can be achieved. 通过在多台密钥服务器上注册数量均等的 ______ ，并在配置中控制密钥服务器的运行次序，从而在一定程度上实现负载均衡。
填空题20. The signature update license is configured on the router using the ______ command. 通过命令______为路由器配置签名更新许可。
填空题1. A typical NAT implementation includes a single ______ stub host that requires translation to a(n) ______ network. NAT通常用于将单一一个______末端主机地址转换为______网络地址。
填空题 When using EAP-MD5
填空题17. The ______ SNMP security model supports both authentication and encryption. ______ SNMP安全模型同时支持认证与加密。
填空题 GET VPNs provide connectionless
填空题19. If the key server fails to get a ______ to a rekey message from the group member after three rekeys, it removes the group member. 如果密钥服务器连续3次没有从组成员那里接收到关于密钥更新消息的______，那么密钥服务器将移除组成员关系。
填空题5. The Network Time Protocol (NTP)is typically used with the ______ SCF action. 网络时间协议(NTP)通常与SCF定义的______行为配合使用。
填空题2. ______ can increase the risk to remote clients and internal resources because the clients can potentially act as a relay between untrusted and trusted networks. ______会给远程客户端和内部资源带来风险，因为客户端可能成为不可信任网络和可信任网络之间的中继设备。