Siemens HiPath C10 User Manual page 269

Term
Datagram
Decapsulation
Device Server
DHCP
Directory Agent (DA) A method of organizing and locating the resources (such as printers,
Table 19
A31003-W1040-U101-1-7619, July 2006 DRAFT
HiPath Wireless Controller, Access Points and Convergence Software V4.0, C10/C100/C1000 User Guide
Explanation
A datagram is "a self-contained, independent entity of data carrying
sufficient information to be routed from the source to the destination
computer without reliance on earlier exchanges between this source
and destination computer and the transporting network." (RFC1594).
The term has been generally replaced by the term packet. Datagrams
or packets are the message units that the Internet Protocol deals with
and that the Internet transports.
See tunnelling.
A specialized, network-based hardware device designed to perform a
single or specialized set of server functions. Print servers, terminal
servers, remote access servers and network time servers are
examples of device servers.
Dynamic Host Configuration Protocol. A protocol for assigning
dynamic IP addresses to devices on a network. With dynamic
addressing, a device can have a different IP address every time it
connects to the network. In some systems, the device's IP address can
even change while it is still connected. DHCP also supports a mix of
static and dynamic IP addresses.
DHCP consists of two components: a protocol for delivering host-
specific configuration parameters from a DHCP server to a host and a
mechanism for allocation of network addresses to hosts. (IETF
RFC1531.)
Option 78 specifies the location of one or more SLP Directory Agents.
Option 79 specifies the list of scopes that a SLP Agent is configured to
use.(RFC2610 - DHCP Options for Service Location Protocol)
disk drives, databases, e-mail directories, and schedulers) in a
network. Using SLP, networking applications can discover the
existence, location and configuration of networked devices.
With Service Location Protocol, client applications are 'User Agents'
and services are advertised by 'Service Agents'. The User Agent
issues a multicast 'Service Request' (SrvRqst) on behalf of the client
application, specifying the services required. The User Agent will
receive a Service Reply (SrvRply) specifying the location of all
services in the network which satisfy the request.
For larger networks, a third entity, called a 'Directory Agent', receives
registrations from all available Service Agents. A User Agent sends a
unicast request for services to a Directory Agent (if there is one) rather
than to a Service Agent.
(SLP version 2, RFC2608, updating RFC2165)
Networking terms and abbreviations
hwc_glossary.fm
Glossary
269