HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 750

Appendix B: Glossary
HFC Hybrid Fiber Coax. A telecommunication technology in which fiber optic
HMAC Hashed Message Authentication Code. The hash value for a packet, generated
Host Any machine or computer that is connected to a network. Each host in a
HSSI High Speed Serial Interface. A serial interface typically used to connect a LAN
HTTP HyperText Transfer Protocol. The protocol used by the World Wide Web. HTTP
IANA Internet Assigned Numbers Authority. IANA controls numbers for protocols,
ICMP Internet Control Message Protocol. ICMP is part of the IP suite. The operating
ICV Integrity Check Value. A checksum that authenticates every part of a packet
B-24
cable and coaxial cable are used in different portions of a network to carry
broadband content (such as video, data, and voice). The service provider
installs fiber optic cable from their distribution center to serving nodes located
close to business and residential users. From these nodes, copper coaxial
cable brings the line to individual businesses and homes.
by running the packet through a cryptographic hash function in combination
with a secret key. The IPSec AH protocol generates an HMAC for a packet so
that a VPN peer can verify the packet's authenticity and the integrity of its
data. A protocol can use any iterative cryptographic hash function to calculate
the HMAC. AH uses MD5 or SHA-1. For more information on HMAC, see RFC
2104 (at http://www.ietf.org/rfc/rfc2104.txt).
network should have a unique network address.
device to a device with a higher-speed WAN connection. HSSI operates at up
to 52 Mbps and connects devices that are less than 50 feet apart.
defines how messages are formatted and transmitted and what actions Web
servers and browsers should take in response to various commands. For more
information about HTTP, see RFC 2616 (at http://www.ietf.org/rfc/
rfc2616.txt).
I
assigns the Country Code Top Level Domains (such as, .uk for the United
Kingdom or .de for Germany), and maintains the IP addresses allotted to
various purposes or organizations.
systems of computers that use IP as their network protocol chiefly use ICMP
to send error messages—indicating, for instance, that a requested service is
not available or that a host or router could not be reached. For more
information, see RFC 792 (at http://www.ietf.org/rfc/rfc0792.txt).
except the authentication field. Both AH and ESP use the ICV as part of the
IPSec standard authentication process.