类别：
- IPLB
- IPLC
- IPLI
- IPLTC
- IPM
- IPM-EOS
- IPM-UA
- IPME
- IPMS
- IPMS
- IPMS-MS
- IPMS-UA
- IPN
- IPN
- IPng
- IPP
- IPP
- IPS
- IPS
- IPS
- IPSS
- IPT
- IPT
- IPv6
- IPX
- IQ
- IQL
- IR
- IR
- IR
- IRFU
- IRI
- IRIM
- IRIS
- IRL
- IRLAP
- IRM
- IrMC
- IRN
- IRN
- IRP
- IRP
- IRQ
- IRSG
- IRSU
- IS
- IS
- IS
- IS
- IS
- IS
- IS
- IS-IS
- ISA
- ISA
- ISAN
- ISAP
- ISB
- ISB
- MIMEP
- poc
- SDI
- AF
- ISC
- ISC
- ISC
- ALIVH
- ISCC
- ISCCI
- ISCII
- ISCP
- ISDCN
- ISDN-BA
- ISDN-BRI
- ISDN-PRA
