HP StorageWorks Enterprise File Services WAN Accelerator - Manual (Page 225)

HP EFS WAN A CCELERATOR M ANAGER U SER ’ S G UIDE 225
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L
O
SS
ARY
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 Inbox,
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.
NIS. Network Information Services. A naming service from that allows resources to
be easily added, deleted or relocated.
OSPF. Open Shortest Path First, An interior gateway routing protocol developed for
IP networks based on the shortest path first or link-state algorithm. Routers use link-