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TKIP – Temporal Key Integrity Protocol – scrambles the keys using hashing algorithmand, by adding an integrity-
checking feature, ensure that the keys haven’t been tampered with.
CCMP – Counter Mode Cipher Block Chaining Message Authentication Code Protocol – encryption protocol
designed for Wireless LAN products that implement the standards of the IEEE 802.11i amendment to the original
IEEE802.11 standard. CCMP is an enchanged data cryptographic encapsulation designed for data confidentiality and
based upon the Counter Mode with CBC-MAC (CCM) of the AES (Advanced Encyprion Standard) standard.
MAC – Media Access Control – hardware address that uniquely identifies each node of a network. In IEEE 802
networks, the Data Link Control (DCL) layer of the PSO Reference Model is divided into two sub-layers: the Logical Link
Control (LLC) layer and the Media Access Control layer. The MAC layer interfaces directly with the network medium.
Consequently, each different type of network medium requires a different MAC layer.
DMZ – Demilitarized Zone – a computer or small subnetwork that sits between a trusted internal network, such as
a corporate private LAN, and an untrusted external network, such as the public internet.
UDP – User Datagram Protocol – a connectionless protocol that, like TCP, runs on top of IP networks. Provides
very few error recovery services, offering instead a direct way to send and receive datagrams over IP network.
VPN – Virtual Private Network – a network that is constructed by using public wires — usually the Internet — to
connect to a private network, such as a company's internal network.
VRRP – Virtual Router Redundancy Protocol - an election protocol that dynamically assigns responsibility for one
or more virtual router(s) to the VRRP router(s) on a LAN, allowing several routers on a multiaccess link to utilize the
same virtual IP address.
GRE Tunnel – Generic Routing Encapsulation - a tunneling protocol developed by Cisco Systems that can
encapsulate a wide variety of network layerprotocols inside virtual point-to-point links over an Internet Protocol
internetwork.
PPPD – Point to Point Protocol Daemon – it is used to manage network connections between two nodes on Unix-
likeoperating systems. It is configured using command-line arguments and configuration files.
SSH – Secure SHell - a program to log into another computer over a network, to execute commands in a remote
machine, and to move files from one machine to another. It provides strong authentication and secure communications
over insecure channels.
VRRPD – Virtual Router Redundancy Protocol – it is designed to eliminate the single point of failure associated
with statically routed networks by automatically providing failover using multiple LAN paths through alternate routers.
SNMP – Simple Network Management Protocol - a set of protocols for managing complex networks. SNMP works
by sending messages, called protocol data units (PDUs), to different parts of a network.
