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Píkaz nastaví velikost bufferu pro uchovávání zadaných píkaz. The MAC address is shown in the Physical Address field: Cisco IOS (pvodn Internetwork Operating System). Once inside the Command Prompt, type the ipconfig/all command. Go to the Command Prompt ( Start – Programs – Accessories – Command Prompt on Windows XP, for newer versions of Windows, just type cmd from the Start screen). The process depends on your operating system: You can find out the MAC address your computer is using. Data communication is divided in several layers, IP is 元, MAC is L2, during the communication, IP never changes ( we must know who are the source and.

CISCO MAC ADDRESS TABLE HISTORY HOW TO

How to find the MAC address of your computer MAC is the address of a node in the physical medium ( a shared medium, like ethernet), IP is the address of a node seen by any point in the Internetwork Study the process of encapsulation. Each hexadecimal character is 4 bits long, so the first six hexadecimal characters represent the vendor (in this case, Hewlett Packard). For example, this is a valid MAC address: D8-D3-85-EA-1B-EE. MAC addresses are usually written in the form of 12 hexadecimal digits. In the following picture we can see the structure of a MAC address: The manufacturer then assigns a unique value for the last 3 bytes, which ensures that every MAC address is globaly unique.

Every network card manufacturer gets a universally unique 3-byte code called the Organizationally Unique Identifier (OUI). Manufacturers agree to give all NICs a MAC address that begins with the assigned OUI. MAC addresses are 6 Bytes (48 bits) long. Every Ethernet network interface card (NIC) has a MAC address burned in its firmware, which is why MAC addresses are sometimes known as hardware addresses. Ethernet uses MAC (Media Access Control) addresses to uniquely identify a host in an Ethernet environment.