---
type: concept
title: MAC Address
tags: [networking, identifier, hardware]
related: [device-registration, campus-it]
created: 2026-06-30
updated: 2026-06-30
sources: ["output/rz_uni_greifswald_de_dienste_technische_infrastruktur_geraeteregistrierung_mac_a.md"]
---

# MAC Address

A **MAC Address** (Media Access Control address) is the unique physical identifier assigned to a network adapter. In the context of the Universität Greifswald [[campus-it]], it is the required identifier for registering **wired** end-devices to authorize network access.

## Format
The address consists of six blocks of two hexadecimal values, separated by either colons or hyphens:
- `XX:XX:XX:XX:XX:XX`
- `XX-XX-XX-XX-XX-XX`

## Retrieval Methods
Depending on the operating system, the MAC address can be found as follows:

### Windows
- **Command Line**: Open `cmd` and execute `getmac /v`. The address for the "Ethernet" entry is the correct one for registration.
- **Script**: The URZ provides a VB-Script to automate this process.

### Linux
- **Command Line**: Execute `ifconfig` in a terminal; the address is listed as the "Hardware Adresse".

### macOS
- **GUI**: Navigate to System Settings $\rightarrow$ Network $\rightarrow$ [Select Adapter] $\rightarrow$ Advanced/More Options $\rightarrow$ Hardware tab.

### ZeroClient
- **Physical**: Located on a sticker on the underside of the device.

For further assistance, users can contact the [[universitatsrechenzentrum-urz]] via the [[groupware]] ticket system or the hotline (ext. 1420).