CLIENT Name specified by the data link when the port is opened. ETHERNET PROTOCOL TYPES Set of Ethernet protocol types that are recognized for this port. Protocol types for a port may be enabled and disabled by the user at any time during the port's existence. LENGTH PRESENT Indicates whether the data link is to add a length field on transmit, and both assume the presence of and remove the length field on receive for Ethernet frames. This attribute is irrelevant for ISO 8802-3 formatted frames because the length field is always present. This is specified by the user when the port is opened. The value true means length fields are added and removed by the data link. LINK Name of the link subentity associated with this port, specified by the user when the port is opened. LLC SAP ADDRESSES Set of SNAP protocol identifiers that are recognized for this port. LLC SAP addresses for a port may be enabled and disabled by the user at any time during the port's existence. LLC SERVICE LLC PDU processing the data-link user requires from the port, specified by the user when the port is opened.This is either LLC Class 1, where the entire LLC protocol is handled by the data link, or user-supplied LLC, where the user is responsible for operating part of the LLC protocol. MAC ADDRESSES Set of individual and multicast MAC addresses that are recognized for this port. MAC addresses for a port may be enabled and disabled by the user at any time during the port's existence. RECEIVE MODE Indicates if the port is to receive all frames regardless of format, Ethernet protocol type, SNAP protocol identifier, LLC SAP address, or MAC address. Promiscuous receipt is enabled and disabled by the user. Support of promiscuous mode is optional. SNAP PROTOCOL IDENTIFIERS Set of SNAP protocol identifiers that are recognized for this port. Protocol identifiers for a port may be enabled and disabled by the user at any time during the port's existence. TYPE Type of port LLC or SMT.