Datatransferisslowbetweenthesourceanddestination.ThequalityofservicerequestedbythetransportlayerintheOSIreferencemodelisnotbeingmaintaineD.Tofixthisissue,atwhichlayershouldthetroubleshootingprocessbegin?()
A. presentation
B. session
C. transport
D. network
E. physical
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Whichcommandrevealsthelastmethodusedtopowercyclearouter?()
A. showreload
B. showboot
C. showrunning-config
D. showversion
《铁路乘车证管理办法》临时定期、软席、硬席、探亲乘车证的有效期间为()个月,可跨年填发。
A. 1
B. 3
C. 6
D. 9
图示结构B截面,弯矩等于()
A. 0
B. m上拉
C. 1.5m下拉
D. 1.5m上拉