Two directly connected routers， R1 and R2， are both configured for OSPF graceful restart. R2 is able to switch packets in hardware， but R1 is not. If a network administrator logs on to R2 and performs a system reload， which will be the result？（） Traffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload.。 R2 will continue to forward traffic to R1， but R1 will drop the traffic because its neighbor adjacency with R2 has failed.。 R2 will continue forwarding traffic to and through R1， but R1 will drop this traffic because it is not capable of maintaining its forwarding state.。 All the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.。
水处理方法。
Which three techniques should be used to secure management protocols？（） Configure SNMP with only read-only community strings.。 Encrypt TFTP and syslog traffic in an IPSec tunnel.。 Implement RFC 3704 filtering at the perimeter router when allowing syslog access from devices on the outside of a firewall.。 Synchronize the NTP master clock with an Internet atomic clock.。 Use SNMP version 2.。 Use TFTP version 3 or above because these versions support a cryptographic authentication mechanism between peers.。
凯恩斯主义的贸易保护理论是一种（）。 一般保护理论。 超保护理论。 战略性贸易理论。 幼稚产业保护理论。
亲和萃取
西方的自然主义和什么紧密相连？（）
