OSPF sends updates every 10 seconds
OSPF sends triggered updates when a network change occurs
When a link state is changed, the router that detected the change creates a link - state advertisement (LSA) and propagates it to all OSPF devices using the 224.0.0.6 multicast address
OSPF sends summaries of individual link- state entries every 30 minutes to ensure LSDB synchronization
第1题:
OSPF is a link-state routing protocol。It is designed to be run internal to a single __(71__system。Each OSPF router maintains an identical __(72)__ describing the autonomous system’s topology。From this database,a routing table is calculated by constructing a shortest-path __(73)__。OSPF recalculates routes quickly in the face of topological changes,utilizing a minimum of routing __(74)__ traffic。OSPF provides support for equal-cost multipath。An area routing capability is provided,enabling an additional level of routing protection and a reduction in routing protocol __(75)__。
A.autonomous
B.network
C.computer
D.server
第2题:
OSPF is a link-state routing protocol。It is designed to be run internal to a single __(71)__system。Each OSPF router maintains an identical __(72)__ describing the autonomous system’s topology。From this database,a routing table is calculated by constructing a shortest-path __(73)__。OSPF recalculates routes quickly in the face of topological changes,utilizing a minimum of routing __(74)__ traffic。OSPF provides support for equal-cost multipath。An area routing capability is provided,enabling an additional level of routing protection and a reduction in routing protocol__(75)__。
71
A.autonomous
B.network
C.computer
D.server
第3题:
●In the following essay,each blank has four choices.Choose the most suitable one from the four choices and write down in the answer sheet.
Open Shortest Path First(OSPF)is a (66) routing algorithm that (67) work done on the OSI IS-IS intradomain routing protocol.This routing,as compared to distance-vector routing,requires (68) processing power.The Dijkstra algorithm is used to calculate (69) OSPF routing table updates only take place when necessary, (70) at regular intervals.
(66) A.distance-vector
B.link-state
C.flow-based
D.selective flooding
(67) A.derived from
B.deviated from
C.was derived from
D.was deviated from
(68) A.more
B.less
C.same
D.most
(69) A.routes
B.road
C.distance
D.cost
(70) A.but rather
B.rather too
C.rather than
D.rather that
第4题:
第5题:
A.90
B.100
C.110
D.120
E.130
F.170
G.200
第6题:
Ospf routing protocol typically runs over (72)
A.IP
B.TCP
C.UDP
D.ARP
第7题:
Ospf routing protocol typically runs over ( )
A.IP
B.TCP
C.UDP
D.ARP
第8题:
根据下面的文字资料回答 71~75 题 n the following essay,each blank has four choices.Choose the most suitable one from the four choices and write down in the answer sheet.
Open Shortest Path First(OSPF)is a( 1 )routing algorithm that( 2 )work done on the OSI IS-IS intradomain routing protocol.This routing,as compared to distance-vector routing,requires( 3 )processing power.The Dijkstra algorithm is used to calculate( 4 )OSPF routing table updates only take place when necessary,( 5 )at regular intervals.
第6题:文中( 1 )处正确的答案是( )。
A.distance-vector
B.link-state
C.flow-based
D.selective flooding
第9题:
Open Shortes t Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF).Which two statements best describe the OSPF link - state routing pro tocol?()
A. OSPF sends updates every 10 seconds
B. OSPF sends triggered updates when a network change occurs
C. When a link state is changed, the router that detected the change creates a link - state advertisement (LSA) and propagates it to all OSPF devices using the 224.0.0.6 multicast address
D. OSPF sends summaries of individual link- state entries every 30 minutes to ensure LSDB synchronization
第10题: