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DES
The Data Encryption Standard is a block cipher with 64-bit blocks and a 56-
bit key.
DHCP
Dynamic Host Configuration Protocol. A communications protocol that
assigns IP addresses to computers when they are connected to the network.
DNS
Domain Name System that allocates Internet domain names and translates
them into IP addresses. A domain name is a meaningful and easy to
remember name for an IP address.
DUN
Dial Up Networking
Encryption
The technique for converting a readable message (plaintext) into random
material (ciphertext) which cannot be read if intercepted. The proper
decryption key is required to read the message.
Ethernet
A physical layer protocol based upon IEEE standards
Firewall
A network gateway device that protects a private network from users on
other networks. A firewall is installed to allow users on an intranet access to
the public Internet without allowing public Internet users access to the
intranet.
Gateway
A machine that provides a route (or pathway) to the outside world.
Hub
A network device that allows more than one computer to be connected as a
LAN, usually using UTP cabling.
Internet
A worldwide system of computer networks - a public, cooperative, and self-
sustaining network of networks accessible to hundreds of millions of people
worldwide. The Internet uses the TCP/IP set of protocols.
Intranet
A private TCP/IP network within an enterprise.
IPMI
Intelligent Platform Management Interface (IPMI) is a set of common
interfaces to a computer system which system administrators can use to
monitor system health and manage the system. The IPMI standard defines
the protocols for interfacing with a service processor embedded into a server
platform.
Key lifetimes
The length of time before keys are renegotiated
LAN
Local Area Network
LDAP
The Lightweight Directory Access Protocol (LDAP) is a protocol used to
access information stored in an LDAP server. It is based on the X.500
standard but is simpler and more readily adapted to meet custom needs.
The core LDAP specifications are defined in RFCs.
LED
Light-Emitting Diode
MAC address
Every piece of Ethernet hardware has a unique number assigned to it called a
MAC address. The MAC address is used by the local Internet router in order
