i
i regular expression case-insensitive
IBM 650 Magnetic Drum Data-Processing Machine World’s first mass-produced computer. Announced 1953. Wikipedia This Day in Tech History
IBM 704 First mass-produced computer with floating-point arithmetic hardware. Introduced in 1954. Wikipedia IBM
IBM Db2 DB2(tm) and Db2(tm) refer to database-server products developed by IBM. These products all support the relational model, but in recent years, some products have been extended to support object-relational features and non-relational structures like JSON and XML. Successor to the 1980s-introducded DB2. Announced in 2017. Website Wikipedia
IBM Model M Keyboard The best keyboard ever made. Uses ALPS switches. Wikipedia Wikipedia (IBM keyboard layouts)
IBM Notes The new name for Lotus Notes.
IBM Personal System/2 (PS/2) Released April, 1987. Introduced OS/2 the PS/2 Wikipedia
iBook Line of laptops from Apple. First released with the iBook G3 June 21, 1999. Wikipedia
iBook (Dual USB) Released May 1, 2001. Wikipedia
iBook (FireWire) Released September 13, 2000. Wikipedia
iBook G3 (aka: iBook G3 Clamshell) Released June 21, 1999. Wikipedia
iBook SE (aka: iBook Special Edition) Released February 16, 2000. Wikipedia
iCloud Cloud storage and synchronization from Apple. Launched October 12, 2011. Wikipedia Apple (System Status)
iCloud Keychain Stores and syncs your passwords across your devices all while encrypted Wikipedia Apple Support
Icons8 38,100 Free Flat Icons in any format, size and color in 20 seconds. Website
Identification Verify identity.
IEC 60309 Wikipedia
IEC 60320 Wikipedia
IEC Connector Wikipedia
IEEE 1394 (aka: FireWire, i.LINK, Lynx) Serial bus interface for high-speed communications and isochronous real-time data transfer. Typically a coper cable which can be up to 4.5 meters (15 ft.) long. Comes in 4, 6, or 9 pin variants. Maximum power of 30 V and 1.5 A. Supports up to 63 daisy chained devices. Similar to USB, though USB requires a master controller. Developed in the late 1980s and early 1990s by Apple, who called it FireWire. Also known by the brands i.LINK (Sony), and Lynx (Texas Instruments). Wikipedia
IEEE 802.11 Standard for wireless. Wikipedia
IEEE 802.11a-1999 (aka: 802.11a) Wireless standard that operates at 5GHz. Maximum transfer speed of 54Mbps. Ratified in 1999. Wikipedia
IEEE 802.11ac Wireless standard that operates at 5GHz. Transfer speed of at least 1Gbps. Developed from 2008 to 2013. ANSI approved December 11, 2013. he first 802.11ac products from 2013 are referred to as Wave 1, and the newer higher bandwidth products introduced in 2016 are referred to as Wave 2. Wikipedia
IEEE 802.11b-1999 (aka: 802.11b) Wireless standard that operates at 2.4GHz. Maximum transfer speed of 11Mbps. Max range of 802.11b and 802.11g is 32m indoors / 140m outdoors. 802.11b products appeared on the market in mid-1999. The Apple iBook was the first mainstream computer sold with optional 802.11b networking. Wikipedia
IEEE 802.11g-2003 Amendment to IEEE 802.11 with transfer speeds up to 54Mbps on the same 2.4GHz band as 802.11b. Max range of 802.11b and 802.11g is 32m indoors / 140m outdoors. Rapidly adopted by consumers starting in January 2003, well before ratification. Wikipedia
IEEE 802.11i-2004 (802.11i) Amendment to the original IEEE 802.11 witch improved security. Implemented as Wi-Fi Protected Access II (WPA2). Draft standard was ratified on June 24, 2004. Wikipedia
IEEE 802.11n-2009 (aka: 802.11n) Wireless standard that can operate at 2.4GHz or 5GHz and is backward compatible with earlier standards. Maximum transfer rate of 600Mbps. Published October 29, 2009. Wikipedia
IEEE 802.11r-2008 (aka: fast BSS transition (FT)) Published July 15, 2008. Website Wikipedia
IEEE 802.16 (WiMAX) Originally published in 2001. Wikipedia (IEEE_802.16) Wikipedia (WiMAX)
IEEE 802.1Q Standard for VLANs over Ethernet. Similar frame format to 802.3. (4 extra bytes fields.) Uses a FCS to verify frames were received. Supports tagged and untagged frames. Untagged frames are placed on the native VLAN. Wikipedia
IEEE 802.2 Standard for Logical Link Control (LLC). Wikipedia
IEEE 802.3 Standard for Ethernet Frame.
[ Preamble (7) | Start of frame delimiter (SFD, 1 bits) | MAC Destination Address (6) | MAC Source Address (6 bits) | 802.1Q tag (optional) (4) | Length (2) | 802.2 Header and Data (46 to 1500) | Frame Check Sequence (FCS, 4 bits) ]
if Performs conditional processing in programs or batch files. Pseudo code: if red {do option 1} else {do option 2} Wikipedia
ifconfig Command that displays network information such as the current IP address on a UNIX based computer Use ipconfig on Windows. Wikipedia
iframe Displays a web page within a web page. W3Schools
iMac All-in-one computer made by Apple. Announced May 6, 1998. First released August 15, 1998. Website Wikipedia
iMac Pro
| Display: |
|
| CPU: | 8-Core, 10-Core, or 18-Core |
| RAM: | 32GB, 64GB, or 128GB |
| SSD | 1TB, 2TB, or 4TB |
| GPU: | Radeon Pro Vega 56 or Radeon Pro Vega 64 |
| MSRP: | $5,000 |
imaginary number Wikipedia
IMAP Secure (IMAPS) (port 993) Operates over SSL or TLS. Wikipedia
impact Harm caused by a threat. Can be measured in two ways: quantitative or qualitative.
impedance Wikipedia
implicit deny Part of an ACL that will block any traffic that has not been allowed by the end of the list.
IN Equality operator. Can be used in place of INTERSECT if IN is not supported by the DBMS.
Incident Response Life Cycle
| Preparation | |
| Detection and analysis | |
| Containment, eradication, and recovery | |
| Post-incident activity |
include PHP statement. include 'example.php' PHP Documentation
increment (++, plus plus) keep adding 1 Wikipedia
Independence Day (aka: Fourth of July) Signing of the Declaration of Independence by the Continental Congress of the United States July 4, 2017. Wikipedia
Independent BSS (IBSS) (aka: ad hoc) Formed when two wireless network devices are directly connected without an AP. For example; two laptops directly connected wirelessly to transfer files. Wikipedia
induced voltage Proportional to the change rate of current. Always opposite in polarity of the applied voltage.
inductance (L) Measured in henrys (H). One of the primary types of load in AC circuits. Wikipedia
inductive reactance (XL) Counter-voltage that limits the flow of current, as does resistance. Measured in ohms. Proportional to inductance of a coil and the frequency of the line.
inductor Coil of wire wrapped around a core, such as iron. Generates an electromagnetic field. Developed by Michael Faraday in 1831 when he discovered electromagnetic induction. Wikipedia YouTube (Make:)
Industry Standard Architecture (ISA) Wikipedia
inequalities
| less than | x < y |
inetd Daemon that runs internet services in UNIX Wikipedia
Information Concealment Engine (ICE)
Information Security (InfoSec) Integrity, availability, authentication, non-repudiation. Wikipedia
Information Security Operations Center (ISOC) (aka: SOC) Facility where Enterprise Information Systems (EIS) are monitored, assessed, and defended. Wikipedia
Information Technology (IT) Wikipedia
Information Theory Khan Academy
Infrared Data Association (IrDA)
Infrastructure as a Service (IaaS) Wikipedia
infrastructure mode A wireless LAN topology. Wireless devices are connected using another device such as an access point or a wireless router.
ingress filtering Ensures packets come from where they claim. Wikipedia
initialization (init) Fist process to start in UNIX-based operating systems. Wikipedia
Initialization Vector (IV) Fixed-size input to a cryptographic primitive that is typically required to be random or pseudorandom. Involves attempting to break WEP keys by targeting their weak IV’s. Wikipedia
ink-jet printer Uses drops of ink to print.
inline-block CSS value for the display property. Ued to arange boxes. W3Schools
INSERT SQL command used in databases to add new rows to tables.
Insider Hub Part of the Windows Insider Preview program. Settings > System > Apps & features > Manage optional features, and then select Add a feature. From the list, choose Insider Hub, and then select Install. Website
Inspiron Laptop from Dell. Wikipedia
Inspiron 7559 Website Support Wikipedia
Install-WindowsFeature PowerShell command to install rolls, services, or features to Windows Server.
Install-WindowsFeature Server-Gui-Mgmt-Infra,Server-Gui-Shell -Restart | Install a GUI on Server Core |
instance Specific object in a class. Wikipedia
Instant Messaging (IM) Real-time text communication. Wikipedia
Institute of Electrical and Electronics Engineers (IEEE) World's largest association of technical professionals. Founded January 1, 1963. Wikipedia Website
Institution of Engineering and Technology (IET) Founded in 2006. Wikipedia
Instruction Set Architecture (ISA) Interface between hardware and software. Wikipedia
Instructions Per Second (IPS) Measure of processor speed. Wikipedia
Instrumentation Ability to monitor or measure the level of a product's performance for diagnostics. Wikipedia
insurance Method of risk transference where the organization pays a premium for the insurance company to assume the risk. If a disaster event occurs, the organization is paid for its losses.
integer (int) A data type. Wikipedia
Integrated Broadband Services (IBBS) Wikipedia
Integrated Circuit (IC) Through hole or surface mount. Wikipedia YouTube (Make:)
integrated circuit package The case or "package" for an integrated circuit to mount on a circuit board. Wikipedia
Integrated Development Environment (IDE) Application that combines several tools for software development together such as compiler, debugger, and code completion. Examples include: Eclipse, Visual Studio, NetBeans, Xcode,... Wikipedia
Integrated Drive Electronics (IDE) The first version of what is now ATA. Developed by Western Digital in 1986. Wikipedia
Integrated Services (IntServ) (aka: hard QoS) Parameterized approach to QoS that can make strict bandwidth reservations. Applications use Resource Reservation Protocol (RSVP) to request and reserve resources through a network. Wikipedia
Integrated Services Digital Network (ISDN) Private, circuit-switched, WAN infrastructure. Uses telephone circuits to send data. Wikipedia
Integrated Services Routers (ISRs) Wikipedia
Intel Founded by Robert Noyce and Gordon Moore July 18, 1968. Website Wikipedia
Intel 4004 4-bit CPU developed by Intel. First Wikipedia
Intel 750 Series SSD PCI Express SSD from Intel. Website Wikipedia PC World
Intel 8008 8-bit Microprocessor developed by Intel. Introduced in April, 1972. Wikipedia
Intel 80286 (aka: Intel 286) 16-bit microprocessor developed by Intel. Introduced 1 February 1982. Wikipedia
Intel 8080 8-bit Microprocessor developed by Intel. Introduced in April, 1974. Wikipedia
Intel 8086 16-bit microprocessor developed by Intel. First member of the x86 family. Introduced in 1978. Wikipedia
Intel Core i7 7700K Kaby Lake CPU from Intel. 4 Cores, 8 Threads, 8M Cache, up to 4.50 GHz, 91W TDP Released January 3, 2017. Intel ARK Wikipedia
Intel Core i7-6850K Broadwell-E CPU from Intel. 6 Cores, 12 Threads, 15M Cache, up to 3.80 GHz, 140w TDP. Released Q2, 2016. Intel ARK Wikipedia
Intel Core i7-6900K Broadwell-E CPU from Intel. 8 Cores, 16 Threads, 20M Cache, up to 3.70 GHz, 140w TDP. Released Q2, 2016. Intel ARK Wikipedia
Intel Core i7-6950X Extreme Edition First 10-core desktop CPU from Intel. Announced May 30, 2016. Intel ARK Engadget
Intel Core i9 Family of microprocessors from Intel. Announced at Computex 2017 May 30, 2017. Website Wikipedia The Verge
Intel Core i9-7980XE CPU from Intel. Announced at Computex 2017 May 30, 2017. Website Wikipedia
Intel Itanium architecture (IA-64) (aka: ia64) Instruction Set Architecture (ISA) for 64-bit Intel microprocessors in the Itanium family. First released June 2001. Wikipedia
Intel Optane Family of storage and memory devices from Intel using 3D XPoint. Introduced at IDF 2015 Website Intel Newsroom
Intel Xeon E3-1505M v5 8M Cache, 2.80 GHz. Mobile CPU from Intel. Releaseed September 2015. Intel ARK Wikipedia
Intel Xeon E3-1575M v5 8M Cache, 3.00 GHz. Mobile CPU from Intel. Released January 2016. Intel ARK Wikipedia
Intelligent Platform Management Interface (IPMI) Wikipedia YouTube (Tek Syndicate)
interface Facilitates the exchange of information or communication. Wikipedia
Interface Devices Wikipedia
Interface ID Part of an IPv6 global unicast address. The 'host' portion of the address. A single host may have multiple interfaces each with one or more IPv6 addresses.
interface loopback Cisco IOS command used to configure a loopback address.
Router(config)# interface loopback value
Interface Message Processor (IMP) Wikipedia
Interior Gateway Protocol (IGP) Used for routing within an Autonomous System. (RIPv1, RIPv2, IGRP, EIGRP, OSPF, IS-IS)
Interior Gateway Routing Protocol (IGRP) A link-state routing protocol.
International Business Machines Corporation (IBM) Wikipedia
International Data Encryption Algorithm (IDEA) [originally called Improved Proposed Encryption Standard (IPES)] Symmetric-key block cipher. Intended as a replacement for the Data Encryption Standard (DES). IDEA is a minor revision of an earlier cipher Proposed Encryption Standard (PES). Designed by James Massey of ETH Zurich and Xuejia Lai and was first described in 1991. Wikipedia
International Electrotechnical Commission (IEC) Wikipedia
International Information Systems Security Certification Consortium (ISC) Wikipedia Website
International Organization for Standardization (ISO) Wikipedia
International Telecommunication Union (ITU) Defines open standards and protocols used by the data link layer. Wikipedia
internet A network of networks. Wikipedia YouTube (Warriors of the Net)
Internet Architecture Board (IAB) Website Wikipedia
Internet Assigned Numbers Authority (IANA) Assigns port numbers. Wikipedia Website
Internet Control Message Protocol (ICMP) Used by diagnostic tools such as ping and traceroute. Defined in RFC 792 September, 1981. Wikipedia RFC 792
Internet Control Message Protocol version 6 (ICMPv6) ICMP for IPv6
Internet Corporation for Assigned Names and Numbers (ICANN) Wikipedia Website
Internet Engineering Steering Group (IESG) Website Wikipedia
Internet Engineering Task Force (IETF)
Internet Group Management Protocol (IGMP)
Internet Information Server (IIS) Wikipedia
Internet Information Services (IIS) Wikipedia
Internet Key Exchange (IKE) (UDP port 500, RFC 2409) Used to set up a security association (SA) in the IPsec protocol suite to authenticate users and devices. Builds on the Oakley protocol and ISAKMP. Uses X.509 certificates for authentication. Several types of authentication: username, password, one-time password, biometrics, PSK, and digital certificates. Originally defined by the IETF in RFC 2407, RFC 2408 and RFC 2409 November 1998. Wikipedia RFC 2407 RFC 2408 RFC 2409
Internet Key Exchange (IKE) Phase 1 Authentication. 3 keys exchanged. Main mode or aggressive mode.
Internet Key Exchange (IKE) Phase 2 Key Exchange. IPsec transform sets. unidirectional IPsec SAs.
Internet Message Access Protocol (IMAP) (IMAP: port 143, IMAPS: port 993) Protocol for email retrieval. IMAP Secure (IMAPS) operates over SSL or TLS. Designed by Mark Crispin in 1986. Wikipedia
Internet Printing Protocol (IPP) Proposed by Novell in 1996. Wikipedia
Internet Protocol (IP) The network layer service implemented by the TCP/IP protocol suite. (Connectionless, Best Effort (unreliable), Media Independent.) Wikipedia YouTube
Internet Protocol Flow Information Export (IPFIX)
Internet Protocol Security (IPsec) Framework of open standards defining how a VPN can be configured and secured. Provides data integrity, peer authentication, data confidentiality (encryption). Not bound to any encryption, authentication, security algorithms, or keying technology. Uses Authentication Headers (AH), Encapsulating Security Payloads (ESP), and Security Associations (SA) as part of its security architecture. The Cisco IPsec implementation uses DES and 3DES in Cipher Block Chaining (CBC) mode. Works at the network layer (Layer 3) encapsulating IP packets. Uses a plaintext Layer 3 header to allow for routing compatibility. When configuring, a few basic parts must be provided: IPsec protocol, confidentiality, integrity, authentication, and secure key exchange. Wikipedia
Internet Protocol Security (IPsec) Authentication Guaranties message comes from the right person and was not forged. (PSK, RSA)
Internet Protocol Security (IPsec) Confidentiality encrypts traffic so it can not be read. (encryption if ESP: DES, 3DES, AES, SEAL)
Internet Protocol Security (IPsec) Configuration Steps: ACLs, ISAKMP (IKE) policy, IPsec transform set, crypto ACL, crypto map.
- //ACLs: permit AH, ESP, and ISAKMP on an IPsec interface while denying any other unnecessary traffic
- Router(config)#
access-list (acl) permit ahp (source) (wildcard) (destination) (wildcard) - Router(config)#
access-list (acl) permit esp (source) (wildcard) (destination) (wildcard) - Router(config)#
access-list (acl) permit udp (source) (wildcard) (destination) (wildcard) eq isakmp - Router(config)#
interface s0/0/0 - Router(config-if)#
ip access-group (acl) in
- //example IKE Policy
- Router(config)#
crypto isakmp policy integer 1-10,000/*1 = highest priority*/ - Router(config-isakmp)#
authentication pre-share - Router(config-isakmp)#
encryption des - Router(config-isakmp)#
group 1 - Router(config-isakmp)#
hash md5/*If hash is not specified, will use SHA*/ - Router(config-isakmp)#
lifetime 86400
- //Pre-Shared Keys
- Router(config)#
crypto isakmp key (keystring) address (peer-address) - Router(config)#
crypto isakmp key (keystring) hostname (hostname) - //example
- Router(config)#
crypto isakmp key cisco123 address 172.30.1.2 - Router(config)#
crypto isakmp key cisco123 address 172.30.2.2
- //IPsec Transform Set
- Router(config)#
crypto ipsec transform-set (transform-set-name) (tranform1) (transform2) (transform3) (transform4) - //example
- Router(config)#
crypto ipsec transform-set VPN-SET esp-aes 256 esp-sha-hmac
- //Crypto ACL
- Router(config)#
access-list (acl) {permit | deny} (protocol) (source) (source-wildcard) (destination) (destination-wildcard) - //example
- Router(config)#
access-list 110 permit tcp 10.0.1.0 0.0.0.255 10.0.2.0 0.0.0.255
- //Crypto Map
- Router(config)#
crypto map (map-name) (seq-num) ipsec-manual - Router(config)#
match address (access-list) - Router(config)#
set [peer | pfs | transform-set | security-association] - Router(config)#
interface (interface-id) - Router(config-if)#
crypto map MYMAP - //example
- Router(config)#
crypto map CMAP 10 ipsec-isakmp - Router(config-crypto-map)#
match address 110 - Router(config-crypto-map)#
set peer 172.30.2.2 default - Router(config-crypto-map)#
set peer 172.30.3.2 - Router(config-crypto-map)#
set pfs group1 - Router(config-crypto-map)#
set transform-set mine - Router(config-crypto-map)#
set security-association lifetime seconds 86400
Internet Protocol Security (IPsec) Integrity Message is not intercepted. (MD5, SHA)
Internet Protocol Security (IPsec) protocol (AH, ESP, ESP+AH)
Internet Protocol Security (IPsec) Secure key exchange DH algorithm group
Internet Protocol version 4 (IPv4) (FC 791) In use since 1983 when it was deployed on the Advanced Research Projects Agency Network (ARPANET). An example address would be: 192.168.10.5
Internet Protocol version 6 (IPv6) An IPv6 address is 128 bits long over IPv4's 32 bits. Every 4 bits is represented by a single hexadecimal digit; for a total of 32 hexadecimal values. Not case sensitive. Network portion identified by a prefix (/64). Can range from /0 to /128. Has three address types: Unicast, Multicast, and Anycast. Three address scopes: global, unique-local, and link-local. Draft standard in RFC 2460 December 1998. Standardized in RFC 8200 July 14, 2017. Wikipedia RFC 2460 RFC 8200 Internet Society
Internet Relay Chat (IRC) Wikipedia
Internet Security Association and Key Management Protocol (ISAKMP) Creates a Security Association (SA) between two hosts. Defined in RFC 2408 November 1998. Wikipedia RFC 2408
Internet Service Provider (ISP) Provide access to the internet. Four things to consider when choosing an ISP:
| Cost |
| Speed |
| Reliability |
| Availability |
Internet Small Computer System Interface (iSCSI) Allows for SCSI commands to be sent over IP. Wikipedia
Internet Storage Name Service (iSNS) Protocol that allows automated discovery, management and configuration of iSCSI and Fibre Channel devices (using iFCP gateways) on a TCP/IP network. Wikipedia
Internet Systems Consortium (ISC) Wikipedia
Internet Tidal Wave Memo written by Bill Gates titled "The Internet Tidal Wave" declaring: "The Internet is the most important single development to come along since the IBM PC was introduced in 1981." Sent out May 26, 1995. Wired This Day in Tech History
Internet-Draft (I-D) Working documents published by the IETF. Wikipedia IETF
Internetwork Operating System (IOS) Operating System that runs on Cisco networking gear. Can be stored on non-volatile flash a TFTP server. Copied to RAM when device is powered on. Wikipedia YouTube
Internetwork Packet Exchange/Sequenced Packet Exchange (IPX/SPX) Wikipedia
Interrupt Request Level (IRQL) Hardware independent means with which Windows prioritizes interrupts that come from the system's processors. Wikipedia
INTO SQL command used in databases to specify a table name.
Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) An IPv6 transition mechanism meant to transmit IPv6 packets between dual-stack nodes on top of an IPv4 network. Wikipedia
intranet internal network of LANs and WANs Wikipedia
Intrusion Detection System (IDS) Monitors network traffic. Developed by SRI International in 1984. Wikipedia
Intrusion Prevention System (IPS) Responds immediately and inspects traffic before it enters the network. Developed during the late 1990s. Wikipedia YouTube
Inverse Address Resolution Protocol (InARP)
Inverter (aka: NOT gate) Wikipedia
Invoke-Expression PowerShell cmdlet. Invoke-Expression or iex
Invoke-WebRequest PowerShell cmdlet. Invoke-WebRequest or iwr
iOS Apple's mobile OS Wikipedia
iOS 11 Released September 19, 2017. Website Wikipedia
iOS 11.0.1 Released September 26, 2017. Apple Support 9to5Mac
iOS 11.3 Released March 29, 2018.
IOS update
- Switch
- //ensure there is an IP address for the management VLAN
- Router
- //ensure there is an IP address for the interface in use
- Router#
copy tftp flash: - Address or name of remote host []?
ip address - Source filename []?
source filename - Destination filename [source filename]?
IP Address Management (IPAM) Tracks IP aDDRESSES IN A NETWORK. tECH nET Wikipedia
IP Private Branch Exchanges (PBXs)
ip route Command to configure a static route.
IP Suite A suite of protocols required for sending and receiving data using the Internet. Wikipedia
IP-Header Identifies the packet characteristics. Significant fields in the IPv4 header include: Version, Differentiated Services (DS), Time-to-Live (TTL), Source IP Address, Destination IP Address.
iPad Tablet made by Apple. First announced January 27, 2010. Wikipedia
ipaddress Python library for manipulating IP addresses. Python Documentation
ipconfig Command that displays network information such as the current IP address on a Windows based computer. Use ifconfig on a UNIX-based machine.
| Options: | |
|---|---|
/all | Display full configuration information. |
/displaydns | Display the contents of the DNS Resolver Cache. |
/flushdns | Purges the DNS Resolver cache. |
/registerdns | Refreshes all DHCP leases and re-registers DNS names. |
/release | Release the IPv4 address for the specified adapter. |
/release6 | Release the IPv6 address for the specified adapter. |
/renew | Renew the IPv4 address for the specified adapter. |
/renew6 | Renew the IPv6 address for the specified adapter. |
/setclassid | Modifies the DHCP class id. |
/setclassid6 | Modifies the IPv6 DHCP class id. |
/showclassid | Displays all the DHCP class IDs allowed for adapter. |
/showclassid6 | Displays all the IPv6 DHCP class IDs allowed for adapter. |
Iperf Tool for active measurements of the maximum achievable bandwidth on IP networks. Can create TCP and UDP data streams and measure the throughput of a network that is carrying them. Website Wikipedia
iPhone Smartphone made by Apple. First released June 29, 2007.
| Version | Release Date |
|---|---|
| iPhone | 2007 |
| iPhone 3G | 2008 |
| iPhone 3GS | 2009 |
| iPhone 4 | 2010 |
| iPhone 4S | 2011 |
| iPhone 5 | 2012 |
| iPhone 5S | 2013 |
| iPhone 5C | |
| iPhone 6 | 2014 |
| iPhone 6 Plus | |
| iPhone 6S | 2015 |
| iPhone 6S Plus |
Wikipedia Website
iPhone 6 Released September 19, 2014. Wikipedia
iPhone 6S Released September 25, 2015. Wikipedia
iPhone 7 Smartphone made by Apple. Announced September 7, 2016. Released September 16, 2016 Website Wikipedia
iPhone 8 Smartphone from Apple. Announced September 12, 2017 at an Apple Special Event. Pre-order September 15, 2017. Available September 22, 2017. Website Wikipedia MacRumors
iPhone SE Released March 31, 2016. Website Apple Press Info Wikipedia
iPhone X Smartphone from Apple.
| Display: |
|
| CPU: | A11 Bionic chip |
| Memory: | 3 GB RAM |
| Storage: | 64 GB or 256 GB |
| Camera: |
|
| MSRP: | $999 |
iPod Portable music player made by Apple. First released October 23, 2001. Apple Press Info Wikipedia
iPod and iPhone Software Update File (IPSW) Firmware for iPods, iPhones, and iPads. FileInfo
IPS A set of rules that an IDS and an IPS use to detect typical intrusion activity, such as DoS attacks. Cisco
IPS Atomic Signature simplest type of IPS signature
IPsec transform sets IPsec security parameters. (AH or ESP plus the associated algorithm.)
IPv4 Addresses IPv4 includes, private, network, broadcast, loopback, link-local, TEST-NET, and experimental addresses.
IPv4 embedded Type of unicast address used to help transition from IPv4 to IPv6.
IPv4 packet Contains two parts; the IP Header and the Payload. Does not have subnet mask.
ipv6 address autoconfig Router(config-if)# ipv6 address autoconfig Cisco
IPv6 anycast Unicast address that can be assigned to multiple devices. Packets are routed to the nearest device with that address.
IPv6 default static route prefix is ::/0
IPv6 global unicast A type of IPv6 unicast address. Globally unique and routable (like public IPv4). Current ranges are 2000::/3. Can be configured manually or automatically with SLAAC and DHCPv6. Has a global routing prefix subnet ID and interface ID.
[ global routing prefix, 48 bits | subnet ID, 16 bits | Interface ID, 64 bits ]
IPv6 multicast For sending an IPv6 packet to multiple destinations.
IPv6 unicast Uniquely identifies an interface. These can be Global Unicast, Link-Local, Loopback, Unspecified Address, Unique Local, Embedded IPv4.
IS NOT NULL SQL operator for data that is present or known. W3Schools
IS NULL SQL operator for data that is missing or unknown. W3Schools
IS-IS IGP, link-state, classless protocol. Wikipedia
Isaac Asimov American writer and professor of biochemistry at Boston University. He was known for his works of science fiction and popular science. Asimov was a prolific writer. January 2, 1920 - April 6, 1992. Wikipedia
ISACA Risk IT Framework Website
ISDN BRI Two 64Kbps B channels and one 16Kbps D channel. Used for home and small enterprise. Inadequate for video but works fine for voice.
ISDN PRI 23 64Kbps B T1 (30 B E1) channels and 1 64Kbps D channel (1.544Mbps total).
ISO 9660 The file system used in compact discs as a standard across multiple operating systems. Wikipedia
ISO Image Archive file of an optical disc. Wikipedia
isolation transformer Primary and secondary windings are electrically and mechanically separated. Help filter voltage and current spikes between the primary and secondary side.
isset Determine if a variable is set and is not NULL in PHP. PHP Documentation
IT as a Service (ITaaS) Wikipedia Netacad
Itanium Family of 64-bit microprocessors from Intel. First released June 2001. Wikipedia
ItemControl Microsoft Developer Network
Ivy Bridge Microarchitecture codename from Intel. First released April 29, 2012. Wikipedia