HP StorageWorks Enterprise File Services WAN Accelerator Deployment Guide (November 2005)

HP EFS WAN ACCELERATOR DEPLOYMENT GUIDE 115
GLOSSARY
Interface. The point at which a connection is made between two elements,
systems, or devices so that they can communicate with one another.
Internet. The collection of networks tied together to provide a global network
that use the TCP/IP suite of protocols.
IP. Internet protocol. Network layer protocol in the TCP/IP stack that enables
a connectionless internetwork service.
IP address. In IP version 4 (IPv4), a 32-bit address assigned to hosts using the
IP protocol. Also called an Internet address.
IPsec. Internet Protocol Security Protocol. A set of protocols to support secure
exchange of packets at the IP layer. IPsec has been deployed widely to
implement Virtual Private Networks (VPNs). IPsec supports two encryption
modes: Transport and Tunnel. For IPsec to work, the sending and receiving
devices must share a public key.
Latency. Delay between a request being issued and its response being
received.
Layer-4. A communications protocol (called the transport layer) responsible
for establishing a connection and ensuring that all data has arrived safely. The
application delivers its data to the communications system by passing a
stream of data bytes to the transport layer along with the socket (the IP address
of the station and a port number) of the destination machine.
MAPI. Messaging API. A programming interface from Microsoft that enables
a client application to send and receive mail from Exchange Server or a
Microsoft Mail (MS Mail) messaging system. Microsoft applications such as
Outlook, the Exchange client, and Microsoft Schedule use MAPI.
Microsoft Exchange. Messaging and groupware software for Windows from
Microsoft. The Exchange server is an Internet-compliant messaging system
that runs under Windows systems and can be accessed by web browsers, the
Windows In-box, Exchange client or Outlook. The Exchange server is also a
storage system that can hold anything that needs to be shared.
Netmask. A 32-bit mask which shows how an Internet address is divided into
network, subnet, and host parts. The netmask has ones in the bit positions in
the 32-bit address which are used for the network and subnet parts, and zeros
for the host part. The mask must contain at least the standard network portion
(as determined by the class of the address), and the subnet field should be
contiguous with the network portion.
Neural Network. A modeling technique based on the observed behavior of
biological neurons and used to mimic the performance of a system. It consists
of a set of elements that start out connected in a random pattern, and, based
upon operational feedback, are molded into the pattern required to generate
the required results. It is used in applications such as robotics, diagnosing,
forecasting, image processing and pattern recognition.
NFS. Network File System. The file sharing protocol in a UNIX network.