SIM

PacketPath

Packet-level visual simulator

SwitchingBasic3 devices / 8 events

Same subnet: ARP and complete ping

Two hosts communicate through one switch. Watch ARP, MAC learning, echo request, and echo reply.

Learning goal: Understand why a switch preserves the original Ethernet addresses and never changes TTL.
01Current
/
08Events

Logical topology

Click or hover over any device

Interfaces upActive hop
Simulation mode
ARP

ARP request: Host A to SW1

Broadcast / ARP resolution

broadcast

ARP request / Broadcast

Host A needs Host B's MAC before it can send the ping.

Speed

Simulation event list

Click any event to inspect
#EventFromToProtocolActionResult
1ARP requestHost ASW1ARPBroadcastbroadcast
2ARP floodSW1Host BARPFloodbroadcast
3ARP replyHost BSW1ARPReplyforwarded
4ARP reply forwardSW1Host AARPUnicastforwarded
5Echo requestHost ASW1ICMPEncapsulategenerated
6Echo requestSW1Host BICMPForwarddelivered
7Echo replyHost BSW1ICMPReplyforwarded
8Echo replySW1Host AICMPDeliverdelivered