3Com 2924-PWR Access Control List, Address Resolution, Protocol ARP, Boot Protocol, Service Dscp

F GLOSSARY

Access Control List	ACLs can limit network traffic and restrict access to certain users or
(ACL)	devices by checking each packet for certain IP or MAC (i.e., Layer 2)
	information.
Address Resolution	ARP converts between IP addresses and MAC (i.e., hardware) addresses.
Protocol (ARP)	ARP is used to locate the MAC address corresponding to a given IP
	address. This allows the switch to use IP addresses for routing decisions
	and the corresponding MAC addresses to forward packets from one
	hop to the next.
Boot Protocol	BOOTP is used to provide bootup information for network devices,
(BOOTP)	including IP address information, the address of the TFTP server that
	contains the devices system files, and the name of the boot file.
Class of Service (CoS)	CoS is supported by prioritizing packets based on the required level of
	service, and then placing them in the appropriate output queue. Data is
	transmitted from the queues using weighted round-robin service to
	enforce priority service and prevent blockage of lower-level queues.
	Priority may be set according to the port default, the packet’s priority
	bit (in the VLAN tag), TCP/UDP port number, IP Precedence bit, or DSCP
	priority bit.
Differentiated	DSCP uses a six-bit tag to provide for up to 64 different forwarding
Services Code Point	behaviors. Based on network policies, different kinds of traffic can be
Service (DSCP)	marked for different kinds of forwarding. The DSCP bits are mapped to
	the Class of Service categories, and then into the output queues.
Domain Name	A system used for translating host names for network nodes into IP
Service (DNS)	addresses.
Dynamic Host	Provides a framework for passing configuration information to hosts on
Control Protocol	a TCP/IP network. DHCP is based on the Bootstrap Protocol (BOOTP),
(DHCP)	adding the capability of automatic allocation of reusable network
	addresses and additional configuration options.