I	Initialize
IA	IRON Agent
IA	Identity Association
IA	Information Assurance
IA	Interface Addresses
IA	identity-association
IA	integrity advantage
IA5	International Alphabet 5
IAA	I-Am-Alive
IAB	Internet Activites Board
IAB	Internet Activities Board
IAB	Internet Architecture Board
IAC	Interpret-as-Command
IACD	Interface Adjustment Capability Descriptor
IAD	IETF Administrative Director
IAL	Intel Architecture Labs
IAM	Initial Address Message
IANA	Internet Address Naming Authority
IANA	Internet Assigned Number Authority
IANA	Internet Assigned Numbers Authority
IAOC	IETF Administrative Oversight Committee
IAOC	Internet Administrative Oversight Committee
IAP	Intercept Access Point
IAP	Intermediate Aggregation Process
IAP	Intermediate Anonymization Process
IAP	Internet Access Provider
IAPP	Inter-Access Point Protocol
IARP	Inverse Address Resolution Protocol
IASA	IETF Administration Support Activity
IASA	IETF Administrative Support Activity
IASA	Internet Administrative Support Activity
IASF	IETF Administrative Support Foundation
IATA	International Air Transport Association
IATF	Information Assurance Technical Framework
IBAKE	Identity-Based Authenticated Key Exchange
IBAN	International Bank Account Number
IBCF	Interconnection Border Control Function
IBCS	Identity-Based Cryptography Standard
IBE	Identity-based encryption
IBG	inter-burst gap
IBN	Internal Boundary Node
IBR	Island Border Router
IBS	Identity-Based Signature
IC	Immediate Commands
IC	Insert Cursor
ICA	Internet Certification Authority
ICAO	International Civil Aviation Organization
ICAP	Internet Content Adaptation Protocol
ICC	Inter-Chassis Communication
ICCB	Internet Configuration Control Board
ICCP	Inter-Chassis Communication Protocol
ICCRG	Internet Congestion Control Research Group
ICD	International Code Designator
ICDTN	Information-Centric Delay Tolerant Network
ICE	Interactive Community Establishment
ICE	Interactive Connectivity Establishment
ICE	Interactivity Connectivity Establishment
ICI	Istanbul Cooperation Initiative
ICID	Internet Caller-ID Delivery
ICMP	Internet Control Message Protocol
ICN	Information-Centric Networking
ICN	initial counter nonce
ICP	IP Control Protocol
ICP	Initial Connection Protocol
ICP	Internet Cache Protocol
ICP	Internet Code Point
ICP	Internet Conferencing Protocol
ICR	Initial Cell Rate
ICRL	indirect certificate revocation list
ICS	Industrial control systems
ICSG	Industry Connections Security Group
ICSI	International Computer Science Institute
ICV	Integrity Check Value
ICW	Internet Call Waiting
IDC	Internet Data Center
IDEA	International Data Encryption Algorithm
IDF	International DOI Foundation
IDI	Initial Domain Identifier
IDIPS	ISP-Driven Informed Path Selection
IDMEF	Intrusion Detection Message Exchange Format
IDMR	Inter-Domain Multicast Routing
IDMS	Integrated data management system
IDMS	Inter-Destination Media Synchronization
IDN	Internationalised Domain Name
IDN	Internationalized Domain Names
IDP	Initial Domain Part
IDPR	Inter-Domain Policy Routing
IDR	Instantaneous Decoder Refresh
IDR	Inter-Domain Routing
IDR	instantaneous decoding refresh
IDRP	Inter-Domain Routeing Protocol
IDRP	Inter-Domain Routing Protocol
IDS	Integrated Directory Services
IDS	Intrusion Detection System
IDWG	Intrusion Detection Working Group
IE	Information Element
IEA	Ingress-Egress-Aggregate
IEC	International Electrotechnical Commission
IEC	International Engineering Consortium
IEC	Israeli Electric Company
IED	Intelligent Electronic Device
IEL	Inter-element Links
IEN	Internet Experiment Note
IEP	Information Exchange Phase
IEPG	Internet Engineering Planning Group
IEPS	International Emergency Preparedness Scheme
IESG	Internet Engineering Steering Group
IETF	Internet Engineering Task Force
IF	Integer Factoring
IF	intermediate frequency
IFCM	Independent Flow Control Messages
IFD	image file directory
IFL	Inter Facility Link
IFMP	Ipsilon Flow Management Protocol
IGD	Internet Gateway Device
IGMP	Internet Group Management Protocol
IGMP	Internet Group Multicast Protocol
IGP	Interior Gateway Protocol
IGRP	Interior Gateway Routing Protocol
IH	Inner Header
IHL	Internet Header Length
IIB	Interface Information Base
IIH	IS-IS Hello
IIJ	Internet Initiative Japan
IIM	Interface Identifier Management
IIS	IP Integrated Services
IIS	Internet Information Services
IJG	Independent JPEG Group
IK	interchange key
IKE	IPsec Key Exchange
IKE	IPsec's key exchange
IKE	Internet Key Exchange
IKM	input keying material
IKS	Internet Kermit Service
IL2CP	Ingress Layer 2Control Processing
ILA	Identifier-locator addressing
ILCC	Identifier Locator Communication Cache
ILM	ID-Locator Mapping
ILM	Incoming Label Map
ILM	Inferred Loss Measurement
ILMI	Integrated Local Management Interface
ILMI	Interim Local Management Interface
ILNP	Identifier Locator Network Protocol
ILNP	Identifier-Locator Network Protocol
ILV	Index-Length-Value
IM	IP Multimedia
IM	Instant Messaging
IMA	Interactive Multimedia Association
IMAP	Internet Mail Access Protocol
IMAP	Internet Message Access Protocol
IMAP	Internet Messages Access Protocol
IMC	Internet Mail Consortium
IMC	Internet Measurement Conference
IMDN	Instant Message Disposition Notification
IMEI	International Mobile Equipment Identity
IMF	Internet Mail Format
IMG	Internet Media Guide
IMP	Interface Message Processor
IMPS	Infinite Monkey Protocol Suite
IMR	Internet Monthly Report
IMS	IP Multimedia Subsystem
IMS	Internet Motion Sensor
IMS	Internet Multimedia Subsystem
IMSI	International Mobile Station Identifier
IMSI	International Mobile Subscriber Identity
IMTC	International Multimedia Telecommunications Consortium
IN	Intelligent Network
IN	Island Neighbor
INA	Inverse Neighbor Advertisement
INAP	Intelligent Network Application Part
IND	Inverse Neighbor Discovery
INR	Internet Number Resources
INS	International Network Services
INT	IP/MAC Notification Table
IOD	Initial Object Descriptor
IODEF	Incident Object Description Exchange Format
IOI	Inter Operator Identifier
IOI	Item of Interest
IOS	Internetwork Operating System
IOTP	Internet Open Trading Protocol
IP	Internet Protocol
IP	Internetwork Protocol
IP	Interrupt Process
IPA	Initial Process Associator
IPC	inter-process communication
IPCP	Internet Protocol Control Protocol
IPDR	Internet Protocol Detail Record
IPDS	INTELLIGENT PRINTER DATA STREAM
IPDV	IP Packet Delay Variation
IPDV	Inter Packet Delay Variation
IPDV	Inter-Packet Delay Variation
IPIG	Internet Protocol Implementation Guide
IPLI	Internet Private Line Interface
IPM	Inter Personal Message
IPNG	Internet Protocol Next Generation
IPP	Internet Printing Protocol
IPR	Intellectual Property Rights
IPRA	Internet Policy Registration Authority
IPS	Instruction Processing Synchronizer
IPS	Intelligent Protection Switching
IPS	Inter-Provider SLA
IPS	Internet Protocol Suite
IPS	Intrusion Prevention Systems
IPSO	Internet Protocol Security Option
IPTC	International Press Telecommunications Council
IPTW	Internet Protocol Transition Workbook
IR	Ingress Replication
IR	Instruction Register
IR	Internet Registry
IRA	International Reference Alphabet
IRAC	IPsec Remote Access Client
IRAS	IPsec Remote Access Server
IRC	Internet Relay Chat
IRD	Information Resource Directory
IRI	Internationalized Resource Identifier
IRI	intercept related information
IRIS	Internet Registry Information Service
IRNSS	Internet Resource Name Search Service
IRO	Include Route Object
IRON	Internet Routing Overlay Network
IRR	Internet Routing Registry
IRS	Information Retrieval Service
IRS	Internal Revenue Service
IRSG	Internet Research Steering Group
IRT	Initial retransmission time
IRTC	Interactive Real-Time Communication
IRTF	Internet Research Task Force
IRTP	Internet Reliable Transaction Protocol
IRV	International Reverence Version
IS	Information Service
IS	Intermediate System
IS	International Standard
IS	Internet Standard
IS	integrated services
ISAN	International Standard Audiovisual Number
ISATAP	Intra-Site Automatic Tunnel Addressing Protocol
ISBN	International Standard Book Number
ISC	Information Security Conference
ISC	Interface Switching Capabilities
ISC	Internet System Consortium
ISC	Internet Systems Consortium
ISCD	Interface Switching Capability Descriptor
ISD	Internet Standards document
ISDN	Integrated Service Digital Network
ISDN	Integrated Services Digital Network
ISE	Independent Submission Editor
ISE	Independent Submissions Editor
ISG	Industrial Study Group
ISH	Intermediate System Hello
ISI	Information Sciences Institute
ISI	Input Stream Identifier
ISI	Internal Symbol ID
ISL	Inter-Switch Link
ISMA	Internet Streaming Media Alliance
ISN	Internet School Networking
ISN	initial sequence number
ISO	International Standards Organization
ISP	Internet Service Provider
ISRO	Indian Space Research Organization
ISSN	International Standard Serial Number
ISSN	International Standard Serials Numbers
ISTF	Internet Security Technology Forum
ISU	Iowa State University
IT	Inactivity Test
IT	Incomplete TTTs
IT	Information Technology
ITAD	IP Telephony Administrative Domain
ITAD	Internet Telephony Administrative Domain
ITE	Ingress Tunnel Endpoint
ITE	Isolated Test Environment
ITI	Independence Technologies, Inc.
ITM	Internet Traditional Multicast
ITOT	ISO Transport over TCP
ITP	Internet Transit Provider
ITR	Ingress Tunnel Router
ITR	Internet TLA Registry
ITR	ingress tunneling router
ITSEC	Information Technology Security Evaluation Criteria
ITSP	Internet Telephony Service Provider
ITT	Ideal Transmission Time
ITT	Initiator Task Tag
ITU	International Telecommunication Union
ITU	International Telecommunications Union
ITU	International Telephone Union
IV	Identity Validation
IV	Initializing Vector
IV	initial value
IV	initialization vector
IVL	Independent VLAN Learning
IVM	Internet Voice Messaging
IVR	Interactive Voice Recognition
IVR	interactive voice-response
IW	initial window
IWPS	Internet White Pages Services