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CCNA / CCENT Practice Exam :

Networking Fundamentals

To pass the CCNA and CCENT exams, you gotta know the fundamentals of networking - and to help you do just that, here's a 10-question CCNA practice exam on that topic!

All answers are at the bottom of the page, and to raise the bar a bit, many of today's questions are short answer.

When you're done here, visit our CCNA Practice Exam page for more!

Chris Bryant

CCIE #12999

"The Computer Certification Bulldog"

chris@thebryantadvantage.com

Question 1:

At what layer of the OSI model do end users themselves interact with the network?

Question 2:

What OSI model layer is often referred to as the "managing layer"?

Question 3:

What port number is used by the Secure Socket Layer?

Question 4:

At which layer(s) of the OSI model is data referred to simply as "data"?

Question 5:

At which layer of the OSI model will you find "physical addresses"?

Question 6:

At which layer of the OSI model does data take the form of "segments"?

Question 7:

Of FTP, SSH, POP3, and DHCP, which does not run on TCP?

Question 8:

Does UDP offer error detection and/or error recovery?

A. Error detection only

B. Error recovery only

C. Both

D. Neither

Question 9:

At what layer of the OSI model will we find and use IP addresses?

Question 10:

Which of the following uses a three-way handshake?

A. TCP

B. CHAP

C. UDP

D. PAP

Answers are at the bottom of the page, right after this brief and important message!

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Answers:

1. End users interact with the network at the topmost layer of the OSI model - the Application layer.

2. The managing layer of the OSI model is the Session layer.

3. SSL uses TCP port 443.

4. Data is still in the form of "data" at the Application, Presentation, and Session layers.

5. Watch this one - "physical addresses" are not found at the Physical layer; rather, they're in use at the Data Link layer. It's another name for a MAC address. It's referred to as a physical address since it physically exists on the network card.

6. Data takes the form of segments at the Transport layer.

7. DHCP runs on UDP.

8. "D". UDP offers neither error detection nor error recovery.

9. You'll use IP addresses at the Network layer.

10. "A,B". Both TCP and CHAP use a three-way handshake. You can see the CHAP handshake in action with either debug chap authentication or debug chap negotiation. (It's easier to see with the first command, as the second gives you a LOT of information.)

That's it for this CCNA practice exam, but just click that link for plenty more - and for over 300 Cisco CCNA and CCNP tutorials, visit our Tutorials page!

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