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The OSPF Hello protocol performs which of the following tasks? (Choose two.)（）
A . It provides dynamic neighbor discovery.
B . It detects unreachable neighbors in 90 second intervals.
C . It maintains neighbor relationships.
D . It negotiates correctness parameters between neighboring interfaces.
E . It uses timers to elect the router with the fastest links as the designated router.
F . It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF
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Which two are characteristics of the IS -IS protocol but not OSPF?（）
A . forms adjacencies with all neighbors
B . supports demand circuit routing
C . provides routing support for multiple network layer protocols
D . utilizes SPF algorithm
E . provides for network scalability by allowing the network to be separated into areas
F . three layers of hierarchical routing
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Given：
https://assets.asklib.com/images/image2/201808011526114738.png
Which two statements are true about the result if the default locale is Locale.US？（）
A . The value of b is 2.
B . The value of a is 3.14.
C . The value of b is 2.00.
D . The value of a is 3.141.
E . The value of a is 3.1415.
F . The value of a is 3.1416.
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What are some of the characteristics of the OSPF routing protocol?（）
A . It confines network instability to a single area of network.
B . It increases the routing overhead of the network
C . It supports VLSM
D . It routes between Autonomous Systems.
E . It allows extensive control of routing updates
F . None of the above
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Which two design recommendations are most appropriate when OSPF is the data center core routing protocol? （）
A . Never use passive interfaces.
B . Use NSSA areas from the core down.
C . Use totally stub areas to stop type 3 LSAs.
D . Use the lowest Ethernet interface IP address as the router ID.
E . Tune OSPF timers to enable OSPF to achieve quicker convergence.
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If a metric is not specified for routes that are redistributed into OSPF， the default metric that is assigned to the routes is 20， except for redistributed BGP routes. What is the metric that is assigned to redistributed BGP routes？（）
A . 0
B . 1
C . 10
D . 200
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The OSPF hello protocol performs which of the following tasks?（）
A . It provides dynamic neighbor discovery
B . It detects unreachable neighbors in 90 second intervals
C . It maintains neighbor relationships
D . It negotiates correctness parameters between neighboring interfaces
E . It uses timers to elect the router witch the fastest links as the designated router
F . It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF
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Which two design recommendations are most appropriate when OSPF is the data center core routing protocol？ （）
A . Never use passive interfaces.
B . Use NSSA areas from the core down.
C . Use totally stub areas to stop type 3 LSAs.
D . Use the lowest Ethernet interface IP address as the router ID.
E . Tune OSPF timers to enable OSPF to achieve quicker convergence
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If the bandwidth of an OSPF interface is 64, what would be the calculated cost of the link?（）
A . 1
B . 10
C . 1562
D . 64000
E . 128000
F . None of the above
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What are three characteristics of the OSPF routing protocol?（）
A . It converges quickly.
B . OSPF is a classful routing protocol.
C . It uses cost to determine the best route.
D . It uses the DUAL algorithm to determine the best route.
E . OSPF routers send the complete routing table to all directly attached routers.
F . OSPF routers discover neighbors before exchanging routing information.
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If a metric is not specified for routes that are redistributed into OSPF, the defaul t metric that is assigned to the routes is 20, except for redistributed BGP routes. What is the metric that is assigned to redistributed BGP routes?（）
A . 200
B . 0
C . 1
D . 10
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NumberFormat nf= NumberFormat.getInstance（）； nf.setMaximumFractionDigits（4）； nf.setMinimumFractionDigits（2）； String a = nf.format（3.1415926）； String b = nf.format（2）； Which two are true about the result if the default locale is Locale.US？（）
A . The value of b is 2.
B . The value of a is 3.14.
C . The value of b is 2.00.
D . The value of a is 3.141.
E . The value of a is 3.1415.
F . The value of a is 3.1416.
G . The value of b is 2.0000.
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Which statements describe the routing protocol OSPF?（）
A . It supports VLSM.
B . It is used to route between autonomous systems.
C . It confines network instability to one area of the network.
D . It increases routing overhead on the network.
E . It allows extensive control of routing updates.
F . It is simpler to configure than RIP v2.
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The OSPF Hello protocol performs which of the following tasks (Choose two.)（）。
A . It provides dynamic neighbor discovery.
B . It detects unreachable neighbors in 90 second intervals.
C . It maintains neighbor relationships.
D . It negotiates correctness parameters between neighboring interfaces.
E . Ituses timers to elect the router with the fastest links as the designated router.
F . It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
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Which two are NOT characteristics of the OSPF routing protocol?（）
A . It confines network instability to a single area of network.
B . It increases the routing overhead of the network
C . It supports VLSM
D . It routes between Autonomous Systems.
E . It allows extensive control of routing update
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Which statements describe the routing protocol OSPF？（）
A . It supports VLSM.
B . It is used to route between autonomous systems.
C . It confines network instability to one area of the network.
D . It increases routing overhead on the network.
E . It allows extensive control of routing updates.
F . It is simpler to configure than RIP v2.
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A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）
A . For the two vlans to communicate，a network statement for the trunk interface needs to be added to the OSPF configuration.
B . For the two vlans to communicate， a network statement for each subinterface needs to be added to the OSPF configuration.
C . Direct inter-vlan communication does not require OSPF
D . OSPF cannot be used if router-on-a-stick is configured on the router
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Which two statements are true about The result if the default locale is Locale.US？（）https://assets.asklib.com/images/image2/2018080115431274322.jpg
A . The value of b is 2.
B . The value of a is 3.14.
C . The value of b is 2.00.
D . The value of a is 3.141.
E . The value of a is 3.1415.
F . The value of a is 3.1416.
G . The value of b is 2.0000.
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Multi Protocol Label Switching （MPLS） is a data-carrying mechanism that belongs to the family of packet-switched networks. For an MPLS label， if the stack bit is set to1， which option is true？（）
A . The stack bit will only be used when LDP is the label distribution protocol
B . The label is the last entry in the label stack.
C . The stack bit is for Cisco implementations exclusively and will only be used when TDP is the label distribution protocol.
D . The stack bit is reserved for future use.
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If the bandwidth of an OSPF interface is configured with the "bandwidth 64"command, what would be the calculated cost of the link?（）
A . 1
B . 64
C . 1562
D . 64000
E . 1500
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Kendri co is a co based in the UK, which is now owed US$2.4m to Lakama co based in the US. The money is due in 3 months. The exchange rates available to Kendri co is as follows. Spot rate: 1.5938-1.5962US$/£ 3-month forward rate:1.5938-1.6037 US$/£ If the
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if all OSPF routers on a broadcast network have the same OSPF priority, which parameter is used to determine the new BDR at the time of a DR failure？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/3ce23df98edd74223603f0cf62587cff.jpg' />
A．A
B．B
C．C
D．D
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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(36)routing algorithm that(37)work clone on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires(38)processing power. The(39)algorithm is used to calculate routes. OSPF routing table updates only take place when necessary,(40)at regular intervals.
A．distance-vector
B．link-state
C．flow-based
D．selective flooding
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If the U.S. dollar is worth 129.68 Japanese yen, then the （one） Japanese yen is worth____ US dollars（）
A．0.007711
B．129.68
C．0.002289
D．354
