CCNA Practice Exam 3 Answers

This page provides answers and reading references (coming soon!) associated with CCNA Practice Exam 3. You should probably try the exam before reading this!

1. At which OSI Layer are data representation, compression, and encryption defined?

Data Link
Session
Presentation
Application

Data representation, compression, and encryption are defined at the Presentation layer of the OSI model.

2. True or false. Collisions will not occur if all systems are plugged into individual switch ports.

True
False

True - collisions will not occur if all systems are plugged into their own individual switch ports

3. At which TCP/IP Layer does program-to-program communication take place?

Process
Host to Host
Internet
Network Interface

Program-to-program communication takes place at the Process layer of the TCP/IP model.

4. What type of cable should be used to connect a router to a switch?

Straight
Crossover

A straight cable should be used to connect a router to a switch.

5. What is the dotted-decimal notation subnet mask associated with /17?

255.255.128.0

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