题目内容

AnewBackupConnectionisbeingdeployedonaremotesiterouter.thestabilityoftheconnectionhasbeenaconcern.inordertoprovidemoreinformationtoEIGRPRegardingthisinterface，Youwishtoincorporatethe"Reliability"costmetricintheEIGRPCalculationwiththecommandmetricweights10101.WhatimpactwillthismodificationontheremotesiterouterhaveforotherexistingEIGRPneighborshipsfromthesameEIGRPDomain？（）

A. ExistingNeighborswillimmediatelybeginusingthenewmetric.
B. ExistingNeighborswillusethenewmetricafterclearingtheEIGRPNeighbors.
C. ExistingNeighborswillresync，maintainingtheneighborrelationship
D. Allecistingneighborrelationshipswillgodown

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Whichtwocommandsarerequiredtoenablemulticastonarouter，knowingthatthereceiversonlysupportsIGMPv2？（）

A. IPPIMRP-address
B. IPPIMssm
C. IPPIMSparse-mode
D. IPPIMPassive

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SelectthethreebestanswerswhichbestdescribePrivateNetwork-toNetworkInterface（PNNI）inanATM network.（）

A. ItistheRoutingprotocolusedbetweenATMswitches
B. PNNIusesthesameDijsktraalgorithmforSPFcalculation
C. PNNIandOSPFusethesameDatabasetomakecohesivedecisionforpacketforwarding
D. PNNImeasureslinecapacitiesanddelaysinadditiontosimplecostmetrics

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2，3二氨基萘荧光法测定水中硒时，荧光物质的形成操作为：向消解的溶液中加入10mlNa.2EDTA，盐酸羟胺和甲酚红混合试剂，溶液呈桃红色，用（）调节至淡橙色。

A. 氨水
B. 氢氧化钠
C. 盐酸
D. 硝酸

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2，3二氨基萘荧光法测定水硒，取20ml水样测定时的最低检测浓度为（）ug/L.

A. 0.005
B. 0.025
C. 0.05
D. 0.25

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A. ExistingNeighborswillimmediatelybeginusingthenewmetric. B. ExistingNeighborswillusethenewmetricafterclearingtheEIGRPNeighbors. C. ExistingNeighborswillresync，maintainingtheneighborrelationship D. Allecistingneighborrelationshipswillgodown

Whichtwocommandsarerequiredtoenablemulticastonarouter，knowingthatthereceiversonlysupportsIGMPv2？（）

SelectthethreebestanswerswhichbestdescribePrivateNetwork-toNetworkInterface（PNNI）inanATM network.（）

2，3二氨基萘荧光法测定水中硒时，荧光物质的形成操作为：向消解的溶液中加入10mlNa.2EDTA，盐酸羟胺和甲酚红混合试剂，溶液呈桃红色，用（）调节至淡橙色。

2，3二氨基萘荧光法测定水硒，取20ml水样测定时的最低检测浓度为（）ug/L.

A. ExistingNeighborswillimmediatelybeginusingthenewmetric.
B. ExistingNeighborswillusethenewmetricafterclearingtheEIGRPNeighbors.
C. ExistingNeighborswillresync，maintainingtheneighborrelationship
D. Allecistingneighborrelationshipswillgodown