ACL's and Hex

Hi Everyone-

I'm currently studying hard for 640-821. I'm taking it July 23.

Is ACL's on the Intro exam, or just ICND? I know its tested hard, but not sure its on the INTRO exam.

Also, do you have to know how to do any complex hex to decimal or binary conversion?
Not something simple like 11, but complex (122, 128, etc).

Find more posts tagged with

SAVE $250 on Your CISCO Boot Camp — Use Code "EXAM26"

Exclusively for TechExams members for Infosec Boot Camps starting before April 30, 2026

View CISCO Boot Camps

Comments

bearfan

Example: Number 141.

141/16 = 8 Remainder 13

Hex# = 8D

Divide the number by 16. Then use that number and the remainder number to get the Hex#.

But are ACL's on the INTRO test? Or is that just the ICND test?

tech-airman

bearfan wrote:

Example: Number 141.

141/16 = 8 Remainder 13

Hex# = 8D

Divide the number by 16. Then use that number and the remainder number to get the Hex#.

But are ACL's on the INTRO test? Or is that just the ICND test?

bearfan,

Decimal to Hexadecimal conversions are easier if you add binary as an intermediate step. Let's take your decimal example of 141 decimal.

Step 1: Convert decimal to binary

141/2 = 70 1
070/2 = 35 0
035/2 = 17 1
017/2 = 08 1
008/2 = 04 0
004/2 = 02 0
002/2 = 01 0
001/2 = 00 1

Reading the remainders from bottom to top, 141 decimal = 10001101 binary

Step 2: Split up the binary byte into two separate nibbles.

10001101 byte = 1000 1101

Step 3: Convert each nibble into a hexadecimal digit.

First nibble = 1000 = 0x8
Second nibble = 1101 = 0xD

Step 4: Combine the two hexadecimal digits

141 decimal = 10001101 binary = 0x8D hexadecimal

Since I took the 640-801 CCNA exam, I have no clue where the 640-821 INTRO exam ended and where the 640-811 ICND exam started.

bearfan

I'm glad I got the hexadecimal down now.

Does anyone else know if I have to worry about ACL's for the Intro test or is that just on the ICND test? I find ACL's harder than any other topic, and I'm hoping I don't have to think about it until ICND.

Pash

bearfan,

Again, all you can do is read the exam blueprints. If it's stated on there that the INTRO expects you to know something about it, then read up on it.