企业外部网Extranet对于外部客户是（） ["全公开的","封闭的","半公开的","专用的"]
稀醪酒母
问一个怎么样的属性，能让路由不通告给任何的peer？
从亲和沉淀的机理和分离操作的角度出发，简述亲和沉淀纯化技术的优点。
Which two network attack statements are true？（） ["Access attacks can consist of password attacks，trust exploitation，port redirection，and man-in-the-middle attacks.","Access attacks can consist of UDP and TCP SYN flooding，ICMP echo-request floods，and ICMP directed broadcasts.","DoS attacks can be reduced through the use of access control configuration，encryption，and RFC 2827 filtering.","DoS attacks can consist of IP spoofing and DDoS attacks.","IP spoofing can be reduced through the use of policy-based routing.","IP spoofing exploits known vulnerabilities in authentication services， FTP services，and web services to gain entry to web accounts，confidential databases，and other sensitive information."]
汽轮发电机组润滑油系统各油泵的低油压联动颀序是怎样的？
