3Com 3CBLSG48 User Guide - Page 222

appendix F: gLOSSARY 211 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 Control Protocol on a TCP/IP network. DHCP is based on the Bootstrap Protocol (DHCP) (BOOTP), adding the capability of automatic allocation of reusable network addresses and additional configuration options. Extensible EAPOL is a client authentication protocol used by this switch to verify Authentication the network access rights for any device that is plugged into the Protocol over LAN switch. A user name and password is requested by the switch, and (EAPOL) then passed to an authentication server (e.g., RADIUS) for verification. EAPOL is implemented as part of the IEEE 802.1X Port Authentication standard. Generic Multicast GMRP allows network devices to register end stations with multicast Registration Protocol groups. GMRP requires that any participating network devices or end (GMRP) stations comply with the IEEE 802.1p standard. IEEE 802.1D Specifies a general method for the operation of MAC bridges, includingthe Spanning Tree Protocol. IEEE 802.1Q VLAN Tagging-Defines Ethernet frame tags which carry VLAN information. It allows switches to assign end stations to different virtual LANs, and defines a standard way for VLANs to communicate across switched networks. IEEE 802.1p An IEEE standard for providing quality of service (QoS) in Ethernet networks. The standard uses packet tags that define up to eight traffic classes and allows switches to transmit packets based on the tagged priority value. IEEE 802.1s An IEEE standard for the Multiple Spanning Tree Protocol (MSTP) which provides independent spanning trees for VLAN groups.