![]() ![]() Manufacturer instead of the first 3 hexadecimal digits of the MAC address. Wireshark looks up the OUI in a database and displays the name of the The organization that created the Ethernet standard. OUIs areĪssigned by the Institute of Electrical and Electronics Engineers (IEEE), Identifier (OUI) that identifies the manufacturer of the NIC. Hexadecimal digits of a MAC address form a 24-bit Organizationally Unique The Ethernet decoding section below the packet list window. MAC addresses are displayed as a name followed by three hexadecimal digits in Network, the sender does not yet know the MAC address of the destination host. Purpose of ARP is to determine the unknown address of a destination host on the Looking at the packets, you will notice that the first MAC address is send toĭestination ff:ff:ff:ff:ff:ff, which is the broadcast address. This change is very helpful when working with datalink layer protocols, as itĮnables us to always see the MAC address. They exist and only show MAC addresses if there is no IP header in the packet. Rename the columns so the names are differentįrom the pre-existing Source and Destination columns, which show IP addresses if Right click on the destination MACĪddress to add it as a column too. Layer decoding of one of the ARP packets, right click on the source MAC address Should be 6 ICMP packets and 2 or 4 ARP packets displayed. Once the third ping response has been received, stop capturing packets. ![]() ![]() Figure 1: Wireshark Screenshot with MAC Address Columns ![]()
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