96
Steelhead Appliance Installation and Configuration Guide
Glossary
Deployment ID.
The deployment ID (DID) is used to apply policies and policy updates to groups of
endpoint clients. The DID is associated with the endpoint client upon installation of a MSI package. The
Steelhead Mobile Controller uses the DID to identify the client and provide their assigned policies and
policy updates.
DHCP.
Dynamic Host Configuration Protocol. Software that automatically assigns IP addresses to client
stations logging onto a TCP/IP network.
DMZ.
Demilitarized Zone. A computer or small subnetwork that sits between a trusted internal network,
such as a corporate private LAN, and an untrusted external network, such as the public Internet. Typically,
the DMZ contains devices accessible to Internet traffic, such as Web (HTTP) servers, FTP servers, SMTP (e-
mail) servers, and DNS servers.
DNS.
Domain Name Service. A system used in the Internet for translating names of network nodes into IP
addresses. A Domain Name Server notifies hosts of other host IP addresses, associating host names with IP
addresses.
Domain.
In the Internet, a portion of the Domain Name Service (DNS) that refers to groupings of networks
based on the type of organization or geography.
Endpoint.
An endpoint is a client computer. For example, a PC or laptop.
Endpoint Policy.
An endpoint policy specifies machine-specific software settings for endpoint clients, such
as the data store size. An endpoint policy is required for optimization to occur.
Ethernet.
The most widely used Local Area Network (LAN) access method.
Fat Client.
A client computer which provides large size applications independently of the central server.
FDDI.
Fiber Distributed Data Interface. A set of American National Standards Institute (ANSI) protocols
for sending digital data over fiber optic cable. FDDI networks are token-passing networks, and support
data rates of up to 100 Mbps (100 million bits) per second. FDDI networks are typically used as backbones
for Wide Area Networks (WANs).
File Cluster.
Two or more filers that provide high availability and load balancing.
Filer.
An appliance that attaches to a computer network and is used for data storage.
Full Address Transparency.
A packet addressing method in which the client and server IP addresses and
port numbers are used in the header fields.
Gateway.
A computer that acts as an intermediate device for two or more networks that use the same
protocols. The gateway functions as an entry and exit point to the network. Transport protocol conversion
might not be required, but some form of processing is typically performed.
Gigabit Ethernet.
An Ethernet technology that raises transmission speed to 1 Gbps (1000 Mbps).
Hashing.
Producing hash values for accessing data or for security. A hash value is a number generated from
a string of text. The hash is substantially smaller than the text itself and is generated by a formula in such a
way that it is extremely unlikely that some other text produces the same hash value.
Heartbeat.
A repeating signal transmitted from one appliance to another to indicate that the appliance is
operating.
