Which are three advantages of PPPoA implementation？ （） NAP and NSP provide secure access to corporate gateways without managing end-to-end PVCs.NAP and NSP use Layer 3 routing，Layer 2 Forwarding，or Layer 2 Tunneling Protocol tunnels.Hence，they can scale their business models for selling wholesale service。 The NSP can oversubscribe by deploying idle and session timeouts using an industry standard RADIUS server for each subscriber。 Only a single session per CPE on one virtual channel （VC).The username and password are configured on the CPE， so all users behind the CPE for that particular VC can access only one set ofservices. Users cannot select different sets of services， although using multiple VCs and establishing different PPP session on different VCs is possible。 If a single IP address is provided to the CPE， and NAT or PAT is implemented，certain applications such as IPTV，which embed IP information in the payload， well not work. Additionally，if an IP subnet feature is used，an IP address also has to be reserved for the CPE。 PPPoA can use the features on the Cisco Service Selection Gateway （SSG）。
以下是根据事故现象的交通事故分类的是（）。 撞车事故。 失火事故。 机械事故。 平直路段事故。
A律压缩特性一般A的取值为（）。
班级工作总结过程包括：（）。 工作的考评。 考评结果的处理。 撰写总结报告。 价值判断。 定性评价。
Which statement is correct regarding the operation of DHCP?（） A DHCP client uses a ping to detect address conflicts.(ARP)。 A DHCP server uses a gratuitous ARP to detect DHCP clients.。 A DHCP client uses a gratuitous ARP to detect a DHCP server.。 If an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.。 If an address conflict is detected, the address removed from the pool for an amount of time configurable by the administrator.。 If an address conflict is detected, the address is removed from the pool and will not be reused until server is rebooted.。
Which statement describes the XML management interface in Cisco NX-OS Software？（）
