Khác biệt giữa các bản “Thành viên:Nhiêu Lộc/Sandbox”

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==Tips for Exam Day==
Practice your binary and hexadecimal conversions over and over again before you take your CCNA exams. Binary math questions come in many different forms; make sure you have practiced all of them before exam day. The number one reason CCNA candidates fail their exam is that they’re not prepared for the different types of binary math questions they’re going to be asked, and that they aren’t ready for hexadecimal questions at all.<p>
As you can see, hexadecimal conversions are actually simple. You have to practice them, though!<p>
You don’t have time to learn how to do in on exam day. You’ve got to be ready before you go into the exam room, and the only way to be ready is a lot of practice.<p>
Finally, make sure you read the question carefully. You’ve got hex, decimal, and binary numbers to concern yourself with on your CCNA and CCNP exams. Make sure you give Cisco the answer in the format they’re looking for.<p>
I have written 20 practice questions that will help you practice your hexadecimal conversion skills. Once you practice with these questions, and know exactly how each answer was arrived at, you’ll have no problem with hexadecimal conversions on your Cisco exams.<p>
Best of luck! <br>
To your success, <p>
1. Convert the following hexadecimal number to decimal: 1c <p>
2. Convert the following hexadecimal number to decimal: f1 <p>
3. Convert the following hexadecimal number to decimal: 2a9 <p>
4. Convert the following hexadecimal number to decimal: 14b <p>
5. Convert the following hexadecimal number to decimal: 3e4 <p>
6. Convert the following decimal number to hexadecimal: 13 <p>
7. Convert the following decimal number to hexadecimal: 784 <p>
8. Convert the following decimal number to hexadecimal: 419 <p>
9. Convert the following decimal number to hexadecimal: 1903 <p>
10. Convert the following decimal number to hexadecimal: 345 <p>
11. Convert the following hex number to binary: 42 <p>
12. Convert the following hex number to binary: 12 <p>
13. Convert the following hex number to binary: a9 <p>
14. Convert the following hex number to binary: 3c <p>
15. Convert the following hex number to binary: 74 <p>
16. Convert the following binary string to hex: 00110011 <p>
17. Convert the following binary string to hex: 11001111 <p>
18. Convert the following binary string to hex: 01011101 <p>
19. Convert the following binary string to hex: 10011101 <p>
20. 20.Convert the following binary string to hex: 11010101 <p>
Answers begin on the next page. No peeking! <br>
Before we go through the answers and how they were achieved, let's review the meaning of letters in hexadecimal numbering: <p>
A = 10, B = 11, C = 12, D = 13, E = 14, F = 15. (And remember that ffff.ffff.ffff is a Layer 2 broadcast!) <br>
===Examination===