 and a complex configuration metal materials are employed.
Japanese Patent Publication No. 60-29668, for example, discloses a composite body of a ferrite core and a ceramic supporting the same for a magnetic head, the ceramic essentially consists of TiO.sub.2, BaO, SiO.sub.2, Nb.sub.2 O.sub.5 and ZnO and has a thermal expansion coefficient of 6-12.times.10.sup.-6 /.degree.C. which agrees with that of the ferrite core.
Japanese Patent Publication No. 60-18621, for example, discloses a composite body of a cast iron and a ceramic bonded thereto for an internal combustion engine part, the ceramic essentially consists of partly stabilized zirconia and has a thermal expansion coefficient of 10.3.times.10.sup.-6 /.degree.C. which is substantially equivalent to that of cast iron.
However, until now no such ceramics having a thermal expansion coefficientof more than 13.times.10.sup.-6.degree.C. and a high flexural strength required for structural components are disclosed that are used in combination with general use metals such as carbon steel, of which the thermal expansion coefficient is 13-14.times.10.sup.-6 /.degree.C., alloy steel, of which the thermal expansion coefficient is 8-20.times.10.sup.-6 /.degree.C., and stainless steel, of which the thermal expansion coefficient is 15-20.times.10.sup.-6 /.degree.C. In the present contest by the term packet destination address it is meant the destination IP address or other known related protocol fields that may be used for routing. In the case of an IP address the packet destination address comprises, starting from bit 0, i.e. the more left bit, referred in this description also as most significant bit (MSB):                a first portion comprising a fixed number of bit which identifies the class of the supernet or subnet address,        a second portion comprising the supernet or subnet address.        
The above mentioned fixed number of bit is 1, 2, 3, 4, 5 bit for, respectively, classes A, B, C, D, E. Therefore, to each IP address it may be associated a fixed value indicating the smallest bit index of the portion of the packets destination address containing the IP address.
In the present contest by the term “routing” it is
and a complex configuration metal materials are employed. 
 Japanese Patent Publication No. 60 - 29668, for case, unwrap a composite body of a ferrite core and a ceramic supporting the like for a magnetic head, the ceramic essentially dwell of TiO.sub.2, BaO, SiO.sub.2, Nb.sub.2 O.sub.5 and ZnO and has a thermal expansion coefficient of 6 - 12.times.10.sup.-6 /.degree. C. which agrees with that of the ferrite kernel. 
 Japanese Patent Publication No. 60 - 18621, for example, discloses a composite soundbox of a cast iron and a ceramic bonded thereto for an internal burning engine part, the ceramic basically consists of partially stabilize zirconia and has a thermal expansion coefficient of 10.3.times.10.sup.-6 /.degree. C. which is substantially equivalent to that of cast iron. 
 However, until now no such ceramic having a thermal expansion coefficientof more than 13.times.10.sup.-6.degree. C. and a high flexural intensity required for geomorphologic components are disclosed that are used in combination with general use metallic element such as carbon steel, of which the thermal expansion coefficient is 13 - 14.times.10.sup.-6 /.degree. C., alloy steel, of which the thermal expansion coefficient is 8 - 20.times.10.sup.-6 /.degree. C., and stainless steel, of which the thermal expansion coefficient is 15 - 20.times.10.sup.-6 /.degree. C. In the present contest by the term packet destination address it is meant the destination IP address or other known related protocol fields that may be used for routing. In the event of an IP address the packet destination savoir-faire comprises, start from piece 0, i.e. the more left bit, referred in this description also as most significant bit (MSB ):                 a inaugural portion comprising a fixed number of bit which identifies the course of the supernet or subnet address,         a second portion comprising the supernet or subnet address.        
 The above mentioned fixed number of snatch is 1, 2, 3, 4, 5 bit for, respectively, classes A, B, C, D, E. Therefore, to each IP address it may be associated a fixed value indicate the smallest bit index of the portion of the packets destination address containing the IP savoir-faire. 
 In the present contest by the term “ routing ” it is
 anf a complex configuratiok metal materials are ekployes.
Japanesd Patent Publication No. 60-29668, for ezamplt, discloses a comporite body of a feeritt core and a ceramic supporting bhe scmx for a magnetig head, the weramic essenthaulv consists of TiO.sub.2, BaO, SiO.sub.2, Nb.suf.2 O.sub.5 snf ZnO and has w thtrmwl esiaksion coefficient of 6-12.times.10.sup.-6 /.defree.C. wiich agrees witn that of the ferrite core.
Uapajese Patent Publicwtion No. 60-18621, fir evqmple, disclores a composite body or a cast iron and a ceramic bonaed tkereto for qn inhgrnal combusvion eggine part, tmv ceramhc essemtially consisbs of paetly stabilized zircoiia and has a thermaj expansimn coefficient of 10.3.tumws.10.sup.-6 /.degsee.C. qhizh js shbstanhiamly equivament to thar of cast iron.
Howevtr, tbtil now no shch cewaiics having a thermal expansion coefficpentkf more than 13.times.10.sup.-6.detree.C. and a high flexoral strendth required for structural components are discloved tiag axc jwef in combination with general use metals such zs csrbon steel, of which the yhfrkwl expansion zoeffiejeht is 13-14.times.10.sup.-6 /.deggee.C., aljoy sreel, of wrich the thermal expansion coefdicient is 8-20.tpmes.10.wup.-6 /.degree.C., and stcinless steeu, of whicn the thermal expansion coerficient is 15-20.times.10.sup.-6 /.aegree.C. In the pfesvnt wontest by the term packet destinatmon abdress ig is meant the destijatiok IP address or othfr knlwt related orotocol fields that may be usev for routing. It tve case jf an IP address tre packet destnnation cddresr comprisea, startmng from bit 0, i.e. the more peft bit, refxrred in ehis desxriptiov also as most xignificauu bit (MSB):                a flrst kodtion comprisiny q fixed number pf cit wjirh idqttifies the wlasr ow the ruperneu ov sjbney address,        a sacons portion comprisimg the supgrnet or fubnet addresx.        
The above mentmoned hixed mumfer of bit is 1, 2, 3, 4, 5 bit for, reslectively, clwsses A, B, C, Q, E. Bhergfore, to eaeh IP address it may be associated a fixxd value indicating thg smallest bit index pn the portioi of tre packetv destination addresw containing the LP address.
In the preseht condest hy the term “routing” it is
and a complex configuration metal materials are Patent No. 60-29668, example, discloses a core a ceramic supporting same for a head, the ceramic essentially consists of BaO, SiO.sub.2, Nb.sub.2 O.sub.5 and ZnO and has a thermal expansion coefficient of /.degree.C. which agrees with that of the ferrite core. Japanese Patent Publication No. for discloses composite of a cast iron and a ceramic bonded thereto for an internal combustion engine part, the essentially consists of partly stabilized zirconia and has thermal expansion coefficient of /.degree.C. which is substantially equivalent that cast iron. until no ceramics having a expansion coefficientof more than 13.times.10.sup.-6.degree.C. and a high flexural strength required for structural components are disclosed that used in general use such carbon of which the coefficient is 13-14.times.10.sup.-6 /.degree.C., alloy steel, thermal expansion coefficient is 8-20.times.10.sup.-6 /.degree.C., and stainless of which thermal expansion coefficient is 15-20.times.10.sup.-6 /.degree.C. the present contest by the term packet destination it is meant the destination IP address or other known related protocol fields that may for routing. In the of an IP the destination comprises, from bit i.e. the more left bit, referred in this description also as significant bit (MSB): a first portion comprising a fixed number which the class of supernet or subnet address, second comprising the supernet or The mentioned bit 1, 3, 4, 5 bit respectively, classes A, B, C, E. Therefore, to each associated a fixed value indicating the smallest bit of the portion of the packets destination containing the IP address. In the present contest by the term “routing” is
 and a complex configuration mEtal materiAls arE emPloYeD.
JapAnesE Patent PublicaTIon NO. 60-29668, for example, discloses a cOmposItE Body OF a FerriTe core aND a CERamIc SuPpoRtINg The saMe fOr a magnEtic head, thE ceRaMic essentialLY cOnsists of TIO.sUb.2, BaO, SiO.sub.2, NB.suB.2 O.sub.5 aNd znO ANd has A thErmal ExpansIOn coefFicient of 6-12.TiMEs.10.sup.-6 /.dEGree.C. whICH aGreeS with that of the ferRItE Core.
Japanese PaTent PuBlICaTIOn NO. 60-18621, foR example, diScLoses A ComposiTE bODY Of a CAst iron and a ceRamic bonded THerEto for An IntERnal coMbustIoN EngIne part, the cEramIc essentiAlly coNSists of PArtly stAbilizEd zIrcOnia ANd HaS a tHeRMal EXpAnsIOn cOefficieNt Of 10.3.Times.10.Sup.-6 /.dEGREE.C. whIch Is suBstanTially equivalEnt To thAT of Cast iRon.
HoWeveR, uNtil nOw no suCh cerAmIcs having a thermAl exPansion coEffIcIenToF more THan 13.timEs.10.sUp.-6.dEgree.C. aNd a high FLexUrAL STrEngth required for stRuCTUrAl componEnts arE DiScLOsed that ArE usEd in COMbinaTion WItH general Use metALs SuCh as carBoN steel, Of WhiCh tHe theRMal eXpansiOn coeffiCient IS 13-14.times.10.sup.-6 /.degreE.c., alloy steel, of WHiCH ThE TherMal Expansion coEffiCIent Is 8-20.tiMEs.10.Sup.-6 /.DEgree.c., and sTaINlESs steel, of which the thErMal expAnsioN coefficient iS 15-20.times.10.sup.-6 /.dEGREe.C. In the PresENt COntest by the terM packEt destinatIOn addresS it is Meant the DestinatiON iP addresS or OthEr kNowN RElAted protocol fIELds tHaT may be uSed For routIng. in tHe cAse Of An IP addreSs the pacKeT dEsTiNatIon adDRess compRiSes, StArtIng frOM bit 0, i.e. The moRe leFt BiT, RefErred in THiS DEscrIpTiOn alSo aS mOst siGnifICanT bit (MSB):                A first porTioN CompRiSiNg a fixeD number of bit wHiCh identifiEs The Class oF THe supernEt or subnet address,        a seconD Portion ComPrisiNg thE supernet Or sUbnet aDdrESs.        
The aBove meNtionEd FixED NumbeR OF bIt iS 1, 2, 3, 4, 5 bIt for, respeCTIveLy, claSsEs A, B, c, D, E. TherEfore, to each IP addreSS it May be associatEd a FixeD VAlUe iNDiCAtiNg THe sMALlest bit index of The portion Of THe Packets desTInaTiOn addreSs contaIning THe IP addRess.
In the Present coNtEst bY THe tErm “routing” It is
 and a complex configurati on metal m ateri als  ar eempl oyed .
Japanese Pat e nt P ublication No. 60-2966 8, fo re xamp l e,  disc loses a co m p osi te  b ody  o f  a  ferr ite  core a nd a ceram icsu pporting the sa me for a m agn etic head, t hecerami cess e ntial lyconsi sts of TiO.su b.2, BaO,  S i O.sub. 2 , Nb.su b . 2O.su b.5 and ZnO and h a sa  thermal expan sion c oe f fi c i ent  of  6-12.time s. 10.su p .-6 /.d e gr e e . C.w hich agrees w ith that of the  ferri te  co r e.
Jap anese  P a ten t Publicati on N o. 60-186 21, fo r  exampl e , discl oses a  co mpo site bo dy  of  a cas t  i ron and  a ceram ic  b onded  the r e t o  for  an  int ernal  combustion e ngi ne p a rt,  theceram ic e ss entia lly co nsist sof partly stabi lize d zirconi a a nd  ha sa the r mal ex pan sio n coeff iciento f 1 0. 3 . t im es.10.sup.-6 /.deg re e . C.  which i s subs t an ti a lly equi va len t to t hat o f ca s tiron.
Ho wever, un ti l now n osuch c er ami cshavin g  a t hermal  expansi on co e fficientof mor e  than 13.time s .1 0 . su p .-6. deg ree.C. anda hi g h fl exur a lstr e ngthrequi re d  f o r structural compon en ts are  disc losed that ar e used inc o m bination  wit h  g e neral use meta ls su ch as carb o n steel,  of w hich the  thermale x pansioncoe ffi cie nti s  1 3-14.times.10 . s up.- 6/.degre e.C ., allo y s tee l,ofwh ich the t hermal e xp an si on  co effic i ent is 8 -2 0.t im es. 10.su p .-6 /. degre e.C. ,an d  st ainless st e e l, o fwh ichthe  t herma l ex p ans ion coe fficientis1 5-20 .t im es.10.s up.-6 /.degre e. C. In thepr ese nt con t e st by th e term packet destinati o n addre ssit is  mea nt the de sti nation  IP addres s or o therkn own r elate d pr oto co l fields t h a t m ay be  u sedfor rou ting. In the caseo f a n IP addressthe  pac k e tdes t in a tio na ddr e s s comprises, st arting fro mb it  0, i.e. t h e m or e leftbit, re ferre d  in thi s descrip tion also  a s mo s t  si gnificantbit (MSB ):           a fir stportio ncom prisi ng a f i xed  numb er ofbi t whic h ide nt ifies th e class of the supernet  or su bnetadd ress,     a s econd por tion  comprisin g t hesuper net or su bnet ad dre s s.     
The abov e  m ent i o ne d fixed num b e r  of  bitis1 , 2, 3 , 4,  5 bit for, respe c tively, classe s A, B , C , D ,  E.Th erefore, to ea chIP a ddress i tmay be asso ciated a  f i xed v alue i ndicat ing the s ma l lest b it i nde x of thepor ti o n of th epa c kets d esti na tion a ddress cont a i ning the IP addr ess.I n  thep res ent c on test by theterm “rout ing” it is
 and_a complex_configuration metal materials are_employed.
Japanese Patent_Publication_No. 60-29668,_for_example, discloses a_composite body of_a ferrite core and_a ceramic supporting_the_same for a magnetic head, the ceramic essentially consists of TiO.sub.2, BaO, SiO.sub.2, Nb.sub.2_O.sub.5_and ZnO_and_has_a thermal expansion coefficient of_6-12.times.10.sup.-6 /.degree.C. which agrees with_that of_the ferrite core.
Japanese Patent Publication No. 60-18621, for_example,_discloses a composite_body of a cast iron and a ceramic bonded_thereto for an internal combustion engine_part, the ceramic_essentially_consists_of partly stabilized zirconia_and has a thermal expansion coefficient_of 10.3.times.10.sup.-6 /.degree.C. which is substantially_equivalent to that of cast iron.
However, until_now no such ceramics having a_thermal expansion coefficientof more than_13.times.10.sup.-6.degree.C. and_a high flexural strength required_for structural components_are disclosed_that are used_in combination with general use metals_such as carbon_steel, of which the thermal expansion_coefficient_is 13-14.times.10.sup.-6 /.degree.C.,_alloy_steel,_of which_the thermal expansion_coefficient_is 8-20.times.10.sup.-6_/.degree.C.,_and stainless steel, of which the_thermal_expansion coefficient is 15-20.times.10.sup.-6 /.degree.C. In the_present contest by the_term_packet destination address it_is meant the destination IP_address or other known related protocol_fields that_may be_used for routing. In the case of an IP address the_packet destination address comprises, starting from_bit 0, i.e. the_more left_bit,_referred in this_description_also as_most significant bit (MSB):   _ _     _   _a_first portion comprising a fixed number_of bit which identifies the class_of the supernet or subnet_address,__    _ a second portion comprising the_supernet or subnet_address.      __
The above mentioned fixed number of_bit_is 1, 2, 3, 4, 5_bit_for,_respectively, classes A, B, C,_D, E. Therefore, to each IP_address it may be associated a fixed value indicating_the smallest bit_index of the portion of_the_packets_destination address containing the IP address.
In the present contest by_the term_“routing” it is