What is the purpose of Dual Ring Interconnect with D C for SDH rings？（） ["Protects signals when a ring switch fails","Protects signals when multiple span switches fail","Protects pre-emptible traffic from being dropped when a ring switch occurs","Protects signals against any combination of link failure in each ring"]
当今世界的经济趋势是什么？
（）等行为是违反人同币图样的法律规定的行为。 ["印制代币票券","使用人民币制作商品","使用人民币作为祭拜物品","使用人民币装饰工艺品"]
What are three benefits of the Cisco Adaptive Threat Defense strategy？ （Choose three.） （） [" using QoS techniques such as Traffic Policing to rate limit suspected traffic to prevent DoS attacks"," automatic reconfiguration s of the security devices based on current security threats"," containment and control of security threats"," application security"," anti-x defense F- virtual firewall"]
课
DHCP SERVER在给一个网段设置POOL时，该网段路由器接口地址能不能放入POOL，能why，不能why。
