Manual

287

User Guide

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GLOSSARY

Access Control List (ACL)

ACLs are used to limit Network trafﬁc and restrict access to certain users or devices by

checking each packet for speciﬁed IP or MAC (i.e., Layer 2) information.

Boot Protocol (BOOTP)

BOOTP is used to provide boot IP information for Network devices, including IP Address

information, the address of a TFTP Server that contains the devices system ﬁles, and the

name of the boot ﬁle.

Class of Service (CoS)

CoS is used to prioritizing packets based on the required level of service, and then plac-

ing them in the appropriate output queue. Data is transmitted from the queues using

the weighted round-robin service to enforce priority and prevent blockage of lower-

level queues. Priority may be set accordingly on the Port, in the packet’s priority bit (part

of the VLAN tag), TCP/UDP Port number, or DSCP priority bit.

Differentiated Services Code Point (DSCP)

DSCP uses a six-bit tag to provide for up to 64 different forwarding behaviors. Based

on Network policies, different kinds of trafﬁc can be marked for different levels of

forwarding priority. The DSCP bits are mapped to the Class of Service categories and

then into the output queues.

Domain Name Service (DNS)

A system used for translating host names for Network nodes into IP Addresses.

Dynamic Host Control Protocol (DHCP)

Provides a framework for passing IP conﬁguration information to hosts on a TCP/IP

Network. DHCP is based on the Bootstrap Protocol (BOOTP), adding the capability

of automatic allocation of reusable Network addresses and additional conﬁguration

options.

Extensible Authentication Protocol over LAN (EAPOL)

EAPOL is a client Authentication protocol used by this Switch to verify the Network ac-

cess rights for any device that is plugged into the Switch. A User Name and Password are

requested by the Switch and are then passed to an Authentication Server (e.g., RADIUS)

for veriﬁcation. EAPOL is implemented as part of the IEEE 802.1X Port Authentication

standard.