Lantronix MPS100 Przewodnik Instalacji Pobierz pdf (Strona 209)

Glossary-1

Glossary

AppleTalk AppleTalk was developed by Apple Computer to allow networking between

Macintoshes. All Macintosh computers have a LocalTalk port running

AppleTalk over a 230kbit serial line. AppleTalk also runs over Ethernet media

(via EtherTalk) and Token Ring network media (via TokenTalk). Due to

dynamic addressing and powerful name directory services, installing an

AppleTalk device is generally as simple as attaching it and turning it on.

ARP Address Resolution Protocol. A network protocol that allows hosts to discover

a node’s hardware address from its IP address. ARP requests are generally

sent as broadcast to all nodes, and the node whose IP address matches that in

the request replies. The arp command on UNIX hosts shows the current IP

address to hardware address mapping; the arp command on the Server shows

the current IP host table.

AUI Attachment Unit Interface. A15-pin shielded, twisted pair Ethernet cable used

optionally to connect the Server and a MAU.

backbone The main network cable. Any communications network has a main “cable,”

and devices can be thought of as attaching to this main conductor. (“Cable” is

misleading, because networks can use microwave or fiber optic carriers as

well.) For example, in a university setting, the backbone might be the cable that

runs to all the buildings that need network access. Local sub-networks and

devices are attached to the main backbone.

BOOTP A TCP/IP network protocol that lets “dumb” network nodes request

configuration information from a BOOTP server node. At boot time, the dumb

node sends a broadcast message requesting information and waits for a reply.

The BOOTP host, if configured, provides the dumb node with an IP address,

the IP address of a load host (usually itself), and the name of the download file.

The dumb node needs only know its own hardware address, as this is what the

BOOTP server uses to decide whether it can help the node and what

information to provide.

BOOTP implementations usually have a configuration file (such as

/usr/etc/bootptab) that lists the hardware and IP addresses of BOOTP clients,

as well as the download file they should use. Most TCP/IP hosts can act as

servers if BOOTP replies have been enabled. See your local documentation

(man pages) for specific information.

console The terminal used to configure the Server at boot time. When the Server first

powers up and cannot access a load file, a console is enabled on Port 1 to let

the manager set up the Server. This console port is the only port that is

operational at boot time. After the Server is running normally, the Server will

send diagnostic and error messages to this port.

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Lantronix MPS100 Przewodnik Instalacji Strona 209