There are numerous upper – layer protocols supported by Ethernet II. The source address is always unicast.įor Ethernet II frames, this field contains a hexadecimal value that is used to indicate the type of upper – layer protocol in the data field. The destination address may be a broadcast, which contains all ones, or a unicast.

The first six hex numbers indicate the manufacturer of the network interface card (NIC), the last six hex numbers are the serial number of the NIC. Each address is 48 bits long, or 6 octets, expressed as 12 hexadecimal digits, 0- 9,A -F. This field contains synchronizing bits, processed by the NIC hardware. Step 1: Review the Ethernet II header field descriptions and lengths. A Wireshark capture will be used to examine the contents in those fields. In Part 1, you will examine the header fields and content in an Ethernet II Frame provided to you. Instructions Part 1: Examine the Header Fields in an Ethernet II Frame In Part 2, you will use Wireshark to capture and analyze Ethernet II frame header fields for local and remote traffic. In the first part of this lab, you will review the fields contained in an Ethernet II frame. When learning about Layer 2 concepts, it is helpful to analyze frame header information. For example, if the upper layer protocols are TCP and IP and the media access is Ethernet, then the Layer 2 frame encapsulation will be Ethernet II. The frame composition is dependent on the media access type. When upper layer protocols communicate with each other, data flows down the Open Systems Interconnection (OSI) layers and is encapsulated into a Layer 2 frame. Part 2: Use Wireshark to Capture and Analyze Ethernet Frames Background / Scenario Part 1: Examine the Header Fields in an Ethernet II Frame Lab – Using Wireshark to Examine Ethernet Frames (Answers Version)Īnswers Note : Red font color or g ray highlights indicate text that appears in the instructor copy only.

Wireshark mac address of source