Q: TCP Transport Ports

certskills
By certskills October 9, 2018 09:05

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 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).

A: TCP/IP Model Lingo
A: TCP Transport Ports
certskills
By certskills October 9, 2018 09:05
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Bobby
Bobby
October 9, 2018 10:04 am

The 3rd part of the TCP handshake. (c)

Nicholas
Nicholas
October 10, 2018 9:56 am

B) SYN flag and ACK flags set

Mit
Mit
October 10, 2018 12:24 pm

C & E

Matt
Matt
October 10, 2018 4:20 pm

I think C and E as well.

Matt
Matt
October 11, 2018 1:32 am

Yes, the answer are C and E.

Moses
Moses
November 26, 2018 10:05 pm

I see there is a Syn but no Ack so my answer will be A &E

Naeem Khaliq
Naeem Khaliq
July 18, 2019 5:04 am

So the required answer wants the 3rd part of the 3 way handshake. So from what I remember its SYN, SYN ACK, and then ACK.

From the listed answers the correct one should be C

laurent
laurent
July 19, 2019 10:08 am

where can I see a definite answer here?

laurent
laurent
July 19, 2019 10:21 am

sorry you get it in the next page!

Rob
Rob
September 1, 2019 12:05 pm

Its got to be either B or E…

Punya Atma
March 10, 2021 8:52 pm

the answer is, C

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