Q: TCP Transport Ports
Most CCNA candidates focus on the topics that require deeper learning, topics that you need to configure, verify, and troubleshoot on routers and switches. At the same time, Cisco includes a small set of topics for which you need only conceptual knowledge. The TCP/IP Transport layer happens to be one of those topics and is the focus of today’s question.
The PC on the left of the figure opens URL https://www.example.com, which creates a TCP connection with the web server on the right. Which of the answers lists correct facts about the 3rd TCP segment in the TCP connection establishment flow?
A) SYN flag set, but ACK not set
B) SYN flag and ACK flags set
C) ACK flag set, but SYN flag not set
D) Destination port 80
E) Destination port 443
F) Destination port > 1023
Figure 1: Web Browser Connecting to Web Server
Answer Post in a Few Days!
I’ll post an answer post in a few days. Watch for it! It should be the next post in chronological order as well, so watch for the link at the bottom of this page (just above the comments section).