Suppose that the message you are sending does not reach the destination, such as a ping. Is the content of that message protected? How is a retransmission accomplished?
Routing – When a ping is lost, what happens
ipv4pingrouting
Related Topic
- Ping – How Ping Works from Private IP Source to Public IP Destination Without NAT
- IPv4 – How to Ping a Private IP Address in Another Network
- Routing – Does Reply Use Same Path as Ping Sent?
- Switch – How It Routes Ping Packets
- Ping Issues in the Same Subnet – Troubleshooting Guide
- Ping – What Happens When a Ping Enters a Network
Best Answer
IP protocol provides no guarantee that packets will arrive, arrive on time, or arrive in the proper order. The only thing IP can verify is that the packet header is intact (due to the header checksum). So if a ping is lost, it is...lost. It is up to the sending program to detect that no corresponding reply was received. If you want to guarantee delivery, you need to rely on layer 4 protocols, namely TCP.