Information Technology Reference
In-Depth Information
gateway
Provides translation services between H.323 endpoints and non-H.323 devices.
GLBP
Global Load Balancing Protocol. Similar to HSRP, but provides load balancing
between the redundant routers.
GoS
Grade of service. The probability that a call will be blocked when attempting to seize a
circuit.
Gramm-Leach-Bliley Financial Services Modernization Act of 1999 (GLBA)
Provides pro-
tection against the sale of bank and account information that is regularly bought and sold by
financial institutions.
H.323
ITU framework for multimedia protocols. Used to control Cisco IOS gateways.
hop count
Metric that counts the number of links between routers the packet must traverse
to reach a destination.
H-REAP
Hybrid Remote Edge Access Point. Protocol that provides authentication for
remote APs.
HSRP
Hot Standby Router Protocol. Provides a way for IP devices to keep communicating
on the network even if the default gateway becomes unavailable by having an active and
standby router on the network.
hub-and-spoke (or star) topology
Provides a hub router with connections to the spoke
routers through the WAN cloud.
IANA
Internet Assigned Numbers Authority.
iBGP
Internal BGP: Used for peering between BGP neighbors in the same autonomous sys-
tem. iBGP is used primarily in transit autonomous systems.
ICMPv6
Internet Control Message Protocol Version 6.
ID
Identifier.
IEEE 802.1x
IEEE standard for port-based authentication.
IEEE 802.3ab
IEEE standard that specifies the operation of Gigabit Ethernet over UTP.
IGMP
Internet Group Management Protocol. Protocol used in multicast implementations
between the end hosts and the local router. IP hosts use IGMP to report their multicast group
memberships to routers.
IGP
Interior Gateway Protocol. Meant for routing within an organization's administrative
domain.
improve
Security data analysis, reporting, and intelligent network security.
incident-handling policy
Incident-handling policy defines the processes and procedures for
managing incidents and even emergency-type scenarios.
Integrated Services Router (ISR) G2
Combines IOS firewall, VPN, and IPS services across
the router portfolio, which enables new security features on existing routers.
intranet (site-to-site) VPN
Connect remote offices back to the headend office.
