1.0 What does the Tcp/Ip protocol group do?

Why three handshakes and four waves

Because ack and SYN are both fast enough to merge,

These two can’t go together, and it takes time to shut down some resources

3.0 Differences between ipv4 and ipv6

4.0 Differences between TCP and UDP

5.0 How does TCP Ensure data Order

6.0 If the network latency is 30 seconds, how many seconds does it take to ping a url? , HTTPS?

The wrong figure is 180ms