OSPF is a link-state routing protocol。It is designed to be runinternal to a single ( )system。Each OSPF router maintains an identical ( )describing the autonomous system’s topology。From this database,a routing table is calculated by constructing a shortest-path ( )。OSPF recalculates routes...
解析 A.RIPv1 B.RIPv2 C.EIGRP D.OSPF 正确答案:D 解析:首先RIPv1是不支持认证的,因此答案A我们可以排除。是支持多厂商的,因此是一个开放的标准的协议,可以排除EIGPR,因为这是个CISCO私有的协议。网络的大小可以超过50台路由器,那RIPv2就不满足了,因为RIP最大支持16跳。那么答案就是OSPF了。反馈 收藏 ...
1Open Shortest Path First(OSPF)is a (58) routing algorithm that (59) work done on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires (60) processing power. The Dijkstra algorithm is used to calculate (61) OSPF routing table updates ...
单区域OSPF中随着网络规模的增大,网络故障概率增加且链路状态数据库容量增加 多区域OSPF中包含一个主干区域Area0(一般位于区域中心),其他区域与主干区域通过物理链路或虚拟链路直接相连 多区域OSPF的优点 多区域OSPF的每一个区域都有该区域独立的链路状态数据库 对于每一个区域,其网络拓扑在区域外是不可见的,同样在每...
当需要对引入路由的开销进行设置时,执行命令import-route{direct|static|unr| {ospf|rip|isis} [process-id] |bgp[permit-ibgp]} [cost-type{external|internal} |costcost|tagtag|route-policyroute-policy-name| [level-1|level-2|level-1-2] ]*或import-route{ospf|isis} [process-id] [cost-type{ext...
Why Do We Need OSPF? Before the emergence of OSPF, the Routing Information Protocol (RIP) was the most widely used IGP. RIP is a distance-vector routing protocol which is gradually being replaced by OSPF, due to the former's slow convergence, tendency to form routing loops, and poor scala...
与OSPF一样,运行IS-IS路由选择协议的路由器也是通过收集其他路由器泛洪的链路状态信息来构建自己的链路状态数据库。在OSPF中,OSPF路由器通告链路状态信息是通过LSA(Link State Advertisment),在IS-IS中,与LSA具有同样功能的包含链路状态信息的报文称为LSP(Link State Packets,链路状态数据包)。LSP包含了由IS-IS路由器...
• 路由协议 –路由器用来计算、维护网络路由信息的协议，通常有一定的算法，工作在传输层或应用层。–常见的路由协议有RIP、OSPF、BGP等可被路由器转发的协议，工作在网络层。常见的可路由协议有IP、IPX等 • 可路由协议 ––动态路由协议在协议栈中的位置 BGPRIPOSPFRawIP TCP IP UDP链路层 物理层 •RIP...
当需要对引入路由的开销进行设置时,执行命令ipv6 import-route{direct|static| {ripng|isis|ospfv3} [process-id] } |bgp[permit-ibgp]} [costcost|tagtag|route-policyroute-policy-name|route-filterroute-filter-name| [level-1|level-2|level-1-2] ]*,配置IS-IS引入外部路由。
What is Open Shortest Path First (OSPF)? Open Shortest Path First (OSPF) is an IProutingprotocolthat uses a mathematical algorithm to calculate the most efficient path to direct traffic on IP networks. OSPF is an open standard and designated by the Internet Engineering Task Force (IETF) as ...