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Acts as the clearing-house to assign and coordinate the use of numerous Internet protocol

parameters such as Internet addresses, domain names, protocol numbers and more.

An IBSS, also called an Ad-hoc network, is defined as two or more computers with wireless

adapters within range of each other that form an independent (wireless) network without the

need of an access point (AP).

A message control and error-reporting protocol between a host server and a gateway to the

Internet ICMP uses Internet Protocol (IP) datagrams, but the messages are processed by the

TCP/IP software and are not directly apparent to the application user.

In IPSec, the ID type and ID content identify an individual Security Association (SA).

The ID type can be a domain name, an IP address or an e-mail address.

The ID content is the IP address, domain name, or e-mail address.

In IPSec, the ID type and ID content identify an individual SA. The ID type can be a domain name,

an IP address or an e-mail address. The ID content is the IP address, domain name, or e-mail address.

When used with aggressive negotiation mode, the ID type and content allow an IPSec router to

distinguish between SAs that connect from IPSec endpoints with dynamic IP addresses.

For example, several telecommuters with dynamic IP addresses can use separate passwords to

simultaneously connect to an IPSec router. With main negotiation mode, the ID type and content

act as an extra level of identification for incoming SAs.

An Intrusion Detection System (IDS) monitors traffic for known attack patterns and then alerts the

Network Administrator to them. The rules that define IDS attack patterns should be updated regularly.

IEEE 802.1p Priority defines up to eight separate traffic types by inserting a tag into a MAC-layer

frame that contains bits to define class of service.

802.1Q is an IEEE standard for tagged VLANs (Virtual LANs) in which a VLAN ID is inserted

into the layer-2 frame header to allow the creation of dynamic VLANs across switches. Tagged

VLANs are not confined to the switch on which they were created as are port-based VLANs.

IEEE 802.1x is an extended authentication protocol that allows support of RADIUS

(Remote Authentication Dial In User Service, RFC 2138, 2139) for centralized user profile management

on a network RADIUS server.

IEEE802.3 flow control is typically used with Ethernet ports operating in full duplex mode to

send a pause signal to the sending port, causing it to temporarily stop sending signals when the

receiving port's memory buffers are full.

IGMP is a session-layer protocol used to establish membership in a Multicast group - it is not used

to carry user data. Refer to RFC 1112 and RFC 2236 for information on IGMP versions 1 and 2 respectively.

IGMP Snooping enables a layer-2 switch to learn the members of IP Multicast groups.

Without IGMP snooping, multicast traffic is forwarded to all ports like broadcast traffic.

With IGMP snooping, group multicast traffic is only forwarded to ports that are members of that group.

IGMP Snooping generates no additional network traffic, allowing you to significantly reduce

multicast traffic passing through your switch.

Internet Key Exchange is a two-phase security negotiation and key management service-phase

1 (Authentication) and phase 2 (Key Exchange). A phase 1 exchange establishes an IKE SA

and phase 2 uses that SA to negotiate SAs for IPSec.

An infrastructure network is an integrated wireless and wired network. One or more APs link

a wireless LAN to a wired LAN. This type of network topology is sometimes called an

Extended Service Set (ESS).

Ingress is the act of entering something. An ingress port is an incoming port, that is, the port that a

data packet enters from another port. An ingress router is a router through which a data packet

enters a network from another network.

Wiring that is done from the point of demarcation to the jack in the wall where the line terminates.

Proof that the data is the same as originally intended. Unauthorized software or people have not

altered the original information.

Internal SPTGEN lets you configure, save and upload multiple menus at the same time using just one

configuration text file-eliminating the need to navigate and configure individual menus for each device.

(Upper case "I"). The vast collection of inter-connected networks that use TCP/IP protocols e

volved from the ARPANET (Advanced Research Projects Agency Network) of the late 1960's and early 1970's

(Lower case "i"). Any time you connect two or more networks together, you have an internet.

A private network inside a company or organization that uses the same kinds of software

that you would find on the public Internet, but that is only for internal use.

Person or software interested in breaking computer security to access, modify, or damage data. Also see Cracker.

(Currently IP version 4 or IPv4) The underlying protocol for routing packets on the Internet and

other TCP/IP-based networks.

Internet Protocol Alias allows you to partition a physical network into logical networks over the

same Ethernet interface.

Traditionally, IP packets are transmitted in one of either two ways - Unicast (one sender to one recipient)

or Broadcast (one sender to everybody on the network). IP Multicast is a third way to deliver

IP packets to a group of hosts on the network - not everybody.

Traditionally, routing is based on the destination address only and the router takes the shortest

path to forward a packet. IP Policy Routing (IPPR) provides a mechanism to override the default

routing behavior and forward the packet based on the policy defined by the network administrator.

Refers to the collective group of IP addresses located in any particular place (for example, LAN,

WAN, Ethernet, etc.).

Source routing makes use of an optional header to dictate the route an IP packet takes from

source to destination. Network technicians may use it to time certain paths or for diagnostics.

Most packets do not have a source route header.

Allows changes to IP parameters such as the IP address.

Internet Protocol Security is a standards-based VPN (Virtual Private Network) that offers flexible

solutions for secure data communications across a public network like the Internet. IPSec is built

around a number of standardized cryptographic techniques to provide confidentiality, data integrity

and authentication at the IP layer.

The native NetWare internetworking protocol is IPX (Internetwork Packet Exchange).

Like IP (Internet Protocol), IPX is an internetworking protocol that provides datagram services.

It is a way for multiple users on a system to "chat" over the network.

Provide connections into the Internet for home users and businesses. There are local,

regional, national, and global ISPs. You can think of local ISPs as the gatekeepers into the Internet.

The ITU-T is the primary international body for fostering cooperative standards for telecommunications

equipment and systems. It was formerly known as the CCITT (Consultative Committee for International

Telephony and Telegraphy).