Hence, they synchronize their 'view' of time by communicating numbers. Then, the sender's view of time would be different from the receivers. View real-time stock prices and stock quotes for a full financial overview. Imagine if we didn't have a universal notion of time. So your friend asks you to resend the letter at position 3 (this is the idea behind the expected acknowledgement number).Īs mentioned in the article, it may be just that ('c', 3) is taking longer to arrive and so in that case, the sender sends a duplicate message, but duplicates are typically dropped by the receiver.Ī helpful way to think about these numbers is that they synchronize the data so both parties have the same 'view' of it. It's missing 'c' because it expects a continuous increase of numbers and 3 is missing. Now, suppose the friend gets ('b', 2), but then ('d', 4). The numbers are used in case the packets/messages arrive out of order. To view the list of blocked services by using the CLI: (host) mynode show airgroup blocked-service-id. Imagine you want to send the letters of the alphabet to a friend over the Internet. View the list of blocked services by using the CLI.
