Netgear FVS114 User Manual download pdf (Page 207)

Reference Manual for the ProSafe VPN Firewall FVS114

Glossary

202-10098-01, April 2005

MAC

(1) Medium Access Control. In LANs, the sublayer of the data link control layer that supports

medium-dependent functions and uses the services of the physical layer to provide services to the logical

link control (LLC) sublayer. The MAC sublayer includes the method of determining when a device has

access to the transmission medium. (2) Message Authentication Code. In computer security, a value that is a

part of a message or accompanies a message and is used to determine that the contents, origin, author, or

other attributes of all or part of the message are as they appear to be. (

IBM Glossary of Computing Terms)

MAC address

The Media Access Control address is a unique 48-bit hardware address assigned to every network interface

card. Usually written in the form 01:23:45:67:89:ab.

Maximum Receive Unit

The size in bytes of the largest packet that can be sent or received.

Maximum Transmit Unit

The size in bytes of the largest packet that can be sent or received.

Mbps

Megabits per second.

MDI/MDIX

In cable wiring, the concept of transmit and receive are from the perspective of the PC, which is wired as a

Media Dependant Interface (MDI). In MDI wiring, a PC transmits on pins 1 and 2. At the hub, switch,

router, or access point, the perspective is reversed, and the hub receives on pins 1 and 2. This wiring is

referred to as Media Dependant Interface - Crossover (MDI-X).

MTU

The size in bytes of the largest packet that can be sent or received.

packet

A block of information sent over a network. A packet typically contains a source and destination network

address, some protocol and length information, a block of data, and a checksum.

Point-to-Point Protocol

PPP. A protocol allowing a computer using TCP/IP to connect directly to the Internet.

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Netgear FVS114 User Manual Page 207