Ch10 Wireless Keyterms

Label Switched Routers (LSRs) Devices used with MPLS.

Layer 2 Forwarding (L2F) The Cisco Systems protocol on which L2TP is based.

Layer 2 Tunneling Protocol (L2TP) An industry-standard VPN connection protocol.

Link Control Protocol (LCP) A PPP subprotocol used to communicate between PPP hosts and clients to negotiate communication parameters.

MD5–Challenge Handshake Authentication Protocol. A protocol designed for testing and troubleshooting EAP connections.

A wireless communication option supported by some WAPs that enables the device to work with both 802.11b and 802.11g at the same time.

Multi-input multi-output (MIMO) A technology that makes the use of multiple transceivers and receivers to improve the speed of communications.

Multiprotocol Label Switching. A method in high performance networks that uses labels to route communications appropriately.

Negative acknowledgement (NAK) A special packet type sent by a receiving system to indicate that a packet was not successfully received.

Network control protocol (NCP) A protocol that provides services in support of client/server connections.

Network terminator An ISDN connection device that acts like a hub for ISDN connections.

A wireless network that parallels and overlaps a wired network.

Packet assembly/disassembly device (PAD) A packet-switched network connection device.

A cloud architecture carrier network that uses a fixed-rate connection plus per-packet charges to determine charges.

Physical carrier sense method (PCSM) See distributed coordination function (DCF).

Plain old telephone service (POTS) A telephone network and infrastructure that includes the standard dial-up phone network.

Point coordination function (PCF) A wireless transmission method that uses RTS and CTS to control transmissions. Also known as virtual carrier-sense method (VCSM).

Point-to-Point Protocol over Ethernet (PPPoE) A communication protocol that encapsulates PPP frames inside Ethernet packets.

Point-to-Point Protocol (PPP) A protocol that is used for remote connections over a variety of connection methods and that supports multiple network protocols.

Point-to-Point Tunneling Protocol (PPTP) A Microsoft-developed protocol that is used for VPN connectivity.

Primary rate interface (PRI) An ISDN configuration that supports up to 23 64Kbps B channels and one 64Kbps D channel.

Public Switched Telephone Network (PSTN) A telephone network and infrastructure that includes the standard dial-up phone network.

Any combination of hardware and software components that are used to permit access to a network from remote clients.

Remote Authentication Dial-in User Service (RADIUS) A centralized authentication method.

Request to transmit (RTS) A message type in a WAP, whereby a system requests to be permitted to transmit on the network.

Serial Line Internet Protocol (SLIP) An older access protocol originally designed for use with UNIX computers. SLIP passes user names and passwords as clear text.

Service profile identifier (SPID) An NT-1/NT-2 unique identifier.

A telephonic device that provides similar capabilities to a personal computer.

Switched Multimegabit Data Service (SMDS) A packet-switched server that is under development.

Synchronous Digital Hierarchy (SDH) The name under which SONET is marketed.

Synchronous Optical Network (SONET) An ANSI-standard high-speed U.S. fiber-based communication network.

The standard T-carrier circuit for carrying voice and data.

Bundles of T1 lines.

Terminal adapter (TA) An ISDN client device that performs the same role as a network adapter for ISDN connectivity. Also known as an ISDN modem.

An IPsec mode in which the data portion of a packet is encrypted for host-to-host communications.

An IPsec mode in which the entire IP packet is encrypted and then encapsulated in another IP packet for host-to-host, host-to-network, and network-to-network communications.

Virtual carrier sense method (VCSM) See point coordination function (PCF).

Virtual private network (VPN) An encrypted, secure, private communication path over a public carrier.

Voice over IP (VoIP) The technology on which Internet-based telephone services are based.

A term used to refer to the 802.11 wireless standards.

Wireless LAN (WLAN) LANs connected over a large geographic area, traditionally defined by a LAN connected through the switched telephone network.

Wireless Personal Area Network (WPAN) The standard covering Bluetooth devices, also known as the IEEE 802.15 standard.

The oldest packet-switched service in current use.