Calin's Humble Scanner - User Guide

## Tools and configuration options

Mac Lookup
Multicast IPv4 Lookup

By clicking the main window's Tools button you will get a popup menu with the following options:

- MAC Lookup for finding informations about a MAC address;
- Multicast IPv4 Lookup for finding informations about a multicast IPv4 address;
- Configuration for setting the application's general parameters. This will launch the Application's Configuration window;
- Reset Layout for bringing the main windows to their initial size and position.

## Mac Lookup

The information is returned based on the OUI and IAB database.
After entering a MAC address in the provided window, the results are displayed in the Messages window.
Currently, this function will display:

- MAC's class or vendor (according to the OUIs, IABs and related RFCs);
- the associated IPv4 address if it is found on the ARP cache file;
- the associated IPv6 address if it is found on the ARP cache file.

Note: About OUI and IAB

FYI, here are the OUI and IAB "definitions" from IEEE RegAuth

An OUI / "company_id" is a 24-bit globally unique assigned number referenced by various standards. For example, the OUI is used in the family of 802 LAN standards: Ethernet, Token Ring, etc. The OUI is usually concatenated with another 24 bits that are assigned by that Organization in order to make a 48-bit number that is unique to a particular piece of hardware, to make it possible to uniquely address that hardware. For example, the Ethernet MAC Address is such a 48-bit number, unique to one particular Ethernet interface. The OUI is usually concatenated with 24 or 40 bits to form an EUI-48 or an EUI-64. There are other uses of the OUI however, such as its use as a company identifier in the SNAP protocol.

An Individual Address Block is for people who need less than 4097 unique 48-bit numbers (EUI-48) and thus find it hard to justify buying their own OUI. The IAB is a particular OUI belonging to the IEEE Registration Authority, concatenated with 12 additional IEEE-provided bits, leaving only 12 bits for the owner to assign to his (up to 4096) individual devices.

## Multicast IPv4 Lookup

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