HP BladeSystem bc2800 Embedded Web System User Guide for the HP BladeSystem PC - Page 204

Glossary LAG LAN Layer 2 Layer 3 Layer 4 LCP Load Balancing MAC Address MAC Address Learning MAC Layer MAN Mask MD5 MDI Link Aggregated Group. Aggregates ports or VLANs into a single virtual port or VLAN. Local Area Network. A network contained within a single room, building, campus or other limited geographical area. Data Link Layer or MAC Layer. Contains the physical address of a client or server station. Layer 2 processing is faster than Layer 3 processing because there is less information to process. Network Layer. Contains the logical address and protocol type (IP, IPX, etc). Layer 3 traffic can also be prioritized and forwarded based on packet information, such as the source and destination address. Layer 3 processing takes longer than Layer 2 processing, as there is more information to process. Establishes connections and ensures that all data arrives at the correct destination. Packets inspected at the Layer 4 level are analyzed and forwarding decisions are based on their applications. Link Control Protocol. Manages authentication, compression, and encryption. Enables the even distribution of data and/or processing packets across available network resources. For example, load balancing may distribute the incoming packets evenly to all servers, or redirect the packets to the next available server. M Media Access Control Address. The MAC Address is a hardware specific address that identifies each network node. Characterizes a learning bridge, in which the packet's source MAC address is recorded. Packets destined for that address are forwarded only to the bridge interface on which that address is located. Packets addressed to unknown addresses are forwarded to every bridge interface. MAC Address Learning minimizes traffic on the attached LANs. A sub-layer of the Data Link Control (DTL) layer. Metropolitan Area Network. A communications network covering a metropolitan area or a suburb. A filter that includes or excludes certain values, for example parts of an IP address. Message Digest 5. An algorithm that produces a 128-bit hash. MD5 is a variation of MD4, and increases MD4 security. MD5 verifies the integrity of the communication and authenticates the origin of the communication. Media Dependent Interface. A cable used for end stations. Glossary-8 www.hp.com Embedded Web System User Guide