Internet Protocol Security IPSec, MAC Address

Internet Protocol Security (IPSec)

A security protocol that provides authentication and encryption over the internet. Security is provided at the network or packet processing layer of network communication, rather than the application layer. IPsec supports two encryption modes - transport and tunnel. Transport mode encrypts only the data portion of each packet, but leaves the header untouched. The more secure tunnel mode encrypts both the header and the data portion. On the receiving side, an IPsec-compliant device decrypts each packet.

ITSP

Short for Internet Telephony Service Provider, which is a general term for the organization which provides the Internet Telphony service to the general public

Local Area Network (LAN)

A group of interconnected computer and support devices.

LED

Light emitting diode used for monitoring a device or network condition.

MAC Address

Media Access Control address; the unique physical address of each device's network interface card

Media Access Control (MAC)

A portion of the networking protocol that governs access to the transmission medium, facilitating the exchange of data between network nodes

Modem

Modulator-demodulator, a device that allows computers to communicate with each other over telephone lines or other delivery systems by changing digital signals to telephone signals for transmission and then back to digital signals. Modems come in different speeds: the higher the speed, the faster the data is transmitted.

Network Address Translation (NAT)

A standard that enables a local-area network (LAN) to use one set of IP addresses for external traffic and a second set of addresses for internal traffic.