mac-addresses.html
1 <!DOCTYPE html> 2 <html lang="de"> 3 <head> 4 <meta charset="UTF-8" /> 5 <meta name="viewport" content="width=device-width, initial-scale=1.0" /> 6 <meta http-equiv="onion-location" content="http://bopbopl6lohkl2rts3ltesjnag4hzs4jrx2h6k6etgq5xasbpqekzlqd.onion" /> 7 <title>BOP Wiki: MAC-Addresses</title> 8 <link rel="stylesheet" href="/assets/stylesheet.css" /> 9 <link rel="icon" type="image/x-icon" href="/assets/img/favicon.png"> 10 </head> 11 <body> 12 <header> 13 <!-- --------------------------------------------------------------------------------------------------------------------------------- --> 14 <script src="/assets/js/navbar-OpenClose.js"></script> 15 <script src="/assets/js/lightbox.js"></script> 16 <script src="/assets/js/copyCodeButton.js"></script> 17 <link rel="stylesheet" href="/resources/js-libraries/highlightJS/atom-one-dark.min.css"> 18 <script src="/resources/js-libraries/highlightJS/highlight.min.js"></script> 19 <script src="/resources/js-libraries/highlightJS/highlightjs-line-numbers.min.js"></script> 20 <script>hljs.highlightAll();</script> 21 <script>hljs.initLineNumbersOnLoad();</script> 22 <!-- --------------------------------------------------------------------------------------------------------------------------------- --> 23 <div class="branding"> 24 <button class="toggle-btn-navbar" id="navbarOpenButton">☰</button> 25 <a href="/"> 26 <img class="logo" src="/assets/img/logo.png"> 27 </a> 28 <div class="typing-animation">BytesOfProgress</div> 29 </div> 30 </header> 31 <div id="navbarContainer" class="navbar-container"> 32 <iframe class="navbar-iframe" src="/assets/navbar/navbar.html" frameBorder= "0"></iframe> 33 </div> 34 <main> 35 <article class="blog-post"> 36 <header class="post-header"> 37 <h1 class="post-title">MAC-Addresses</h1> 38 </header> 39 </article> 40 <nav class="breadcrumb"> 41 <a href="/">Home</a> 42 <span class="divider">›</span> 43 <a href="/wiki/">Wiki</a> 44 <span class="divider">›</span> 45 <a href="/wiki/networks/networks.html">Networks</a> 46 <span class="divider">›</span> 47 <span class="current">MAC-Addresses</span> 48 </nav> 49 <section class="post-content"> 50 <p> 51 A MAC address (Media Access Control address) is a unique identifier assigned 52 to the network interface card (NIC) of a device. It is used for communication 53 within a local network. They operate at the Data Link Layer (Layer 2) of the OSI-model. 54 </p> 55 <p> 56 A MAC address is a 48-bit value expressed in hexadecimal and divided 57 into six pairs, separated by colons or hyphens (e.g. FF:00:FF:FF:00:FF). 58 The first half of the address is the Organizationally Unique Identifier (OUI): 59 It identifies the manufacturer. The second half uniquely identifies the device. 60 </p> 61 <p> 62 Although MAC addresses are static by default and hard-coded into hardware 63 during manufacturing, they can be temporarily modified through software tools. 64 </p> 65 <p> 66 MAC addresses are important for local communication. When data is transmitted 67 over a network, both the source and destination MAC addresses are embedded 68 in the data frames. Devices such as switches for example use these addresses to forward 69 data to the right port. Unlike IP addresses, which are also used for communication over the 70 internet, MAC addresses are only used in local networks and are not used 71 for routing data outside it. 72 </p> 73 <p> 74 "FF:FF:FF:FF:FF:FF" is the broadcast MAC address, it basically acts the same 75 way as a broadcast IP address. 76 </p> 77 </section> 78 <footer class="post-footer"> 79 <a href="/wiki/networks/networks.html" class="cta-button">← Back</a> 80 </footer> 81 </main> 82 </body> 83 </html>