Identify the correct sequence in which the following packets are transmitted on the network by a host when a browser requests a webpage from a remote server, assuming that the host has just been restarted.

1. AHTTP GET request, DNS query, TCP SYN
2. BDNS query, HTTP GET request, TCP SYN
3. CTCP SYN, DNS query, HTTP GET request
4. DDNS query, TCP SYN, HTTP GET request

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: D. DNS query, TCP SYN, HTTP GET request

Explanation

The host must first resolve the name (DNS query), then open a TCP connection (SYN), then send the HTTP GET.