A.攻击者利用软件存在的逻辑错误,通过发送某种类型数据导致运算进入死循环,CPU资源占用始终100%
B.攻击者利用软件脚本使用多重嵌套咨询,在数据量大时会导致查询效率低,通过发送大量的查询导致数据库响应缓慢
C.攻击者利用软件不自动释放连接的问题,通过发送大量连接消耗软件并发连接数,导致并发连接数耗尽而无法访问
D.攻击者买通IDC人员,将某软件运行服务器的网线拔掉导致无法访问
A.Shared tree
B.Source-based tree
C.Wildcard tree
D.Flooding tree
A.climate change or poor farming methods result in deforestation and flooding
B.the living standards of cities are much lower
C.the population of rural areas increased faster than that of urban areas
D.there are not enough space for people to live there
A.每个路由器都监理LSA(LSP),来描述自己周边的网络拓扑信息
B.一般都有邻居的发现和维护机制
C.DualIS-IS
D.一般都有可靠的泛洪(flooding)机制