Dell W-Series 228 Instant 6.5.1.0-4.3.1.0 User Guide - Page 414

Table 88: List of Terms Term hotspot IEEE 802.11 standards POE PPPoE QoS RF TACACS TACACS+ VPN Definition A WLAN node that provides Internet connection and virtual private network (VPN) access from a given location. A business traveler, for example, with a laptop equipped for Wi-Fi can look up a local hot spot, contact it, and get connected through its network to reach the Internet and their own company remotely with a secure connection. Increasingly, public places, such as airports, hotels, and coffee shops are providing free wireless access for customers. The IEEE 802.11 is a set of standards that are categorized based on the radio wave frequency and the data transfer rate. Power over Ethernet (PoE) is a method of delivering power on the same physical Ethernet wire used for data communication. Power for devices is provided in one of the following two ways: l Endspan- The switch that an AP is connected for power supply. l Midspan- A device can sit between the switch and APs The choice of endspan or midspan depends on the capabilities of the switch to which the W-IAP is connected. Typically if a switch is in place and does not support PoE, midspan power injectors are used. Point-to-Point Protocol over Ethernet (PPPoE) is a method of connecting to the Internet typically used with DSL services where the client connects to the DSL modem. Quality of Service (QoS) refers to the capability of a network to provide better service to a specific network traffic over various technologies. Radio Frequency (RF) refers to the portion of electromagnetic spectrum in which electromagnetic waves are generated by feeding alternating current to an antenna. Family of protocols that handle remote authentication and related services for network access control through a centralized server. Derived from TACACS but an entirely new and separate protocol to handle AAA services. TACACS+ uses TCP and is not compatible with TACACS. Because it encrypts password, username, authorization, and accounting, it is less vulnerable than RADIUS. A Virtual Private Network (VPN) network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or individual users with secure access to their organization's network. A VPN ensures privacy through security procedures and tunneling protocols such as the Layer Two Tunneling Protocol ( L2TP ). Data is encrypted at the sending end and decrypted at the receiving end. 414 | IAP-VPN Deployment Scenarios Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide