Ethernet Frame Lab

From message to receiver

Your message105 UTF-8 bytes

Message bytes per packetTransport protocolAdd VLAN 100 tagShow preamble and SFD

105message bytes

5TCP segments

5IPv4 packets

5Ethernet frames

Frame 1 structure

Choose a field to inspect its transmitted bytes.

Corrupt one data bit

IPv4 packet45:00:00:40:10:00:40:00:40:06:A7:49:C0:A8:01:0A:C0:A8:01:14:C0:00:00:50 …

Contains a 20-byte IPv4 header, a 20-byte TCP header, and 24 message bytes.

FCS sent with frame0x9F61F1C5

CRC calculated by receiver0x9F61F1C5

Frame acceptedThe calculated CRC matches the transmitted FCS.

Ready to transmit.

Preamble and SFD are transmitted on the wire but are not included in the Ethernet frame length or CRC. This lab uses small message chunks so the packet-to-frame process is easy to see; normal Ethernet commonly uses a 1500-byte IP MTU.