(The Cisco data core design textbook, which introduces in detail the data core design elements carried by ip, and the design method principles, etc., is a rare textbook by IDC. .ALLDESIGNS,SPECIFICATIONS,STATEMENTS,INFORMATION,ANDRECOMMENDATIONS(COLLECTIVELY,DESIGNS)INTHISMANUALAREPRESENTEDASIS,WITHALLFAULTS.CISCOANDITSSUPPLIERSDISCLAIMALLWARRANTIES,INCLUDING,WITHOUTLIMITATION,THEWARRANTYOFMERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEANDNONINFRINGEMENTORARISINGFROMACOURSEOFDEALING,USAGE,ORTRADEPRACTICE.INNOEVENTSHALLCISCOORITSSUPPLIERSBELIABLEFORANYINDIRECT,SPECIAL,CONSEQUENTIAL,ORINCIDENTALDAMAGES,INCLUDING,WITHOUTLIMITATION,LOSTPROFITSORLOSSORDAMAGETODATAARISINGOUTOFTHEUSEORINABILITYTOUSETHEDESIGNS,EVENIFCISCOORITSSUPPLIERSHAVEBEENADVISEDOFTHEPOSSIBILITYOFSUCHDAMAGES.)