الملاحظات التي أرسلتها ل AC حول امتحان CCNA

الملاحظات التي أرسلتها ل AC حول امتحان CCNA 640-821

======= Q28 ===========
hi
"Explanation:
Subnet Mask of 255.255.255.240 means 4-bits of subnetting. When we do 4-bits of subnetting, we have a total of 16 subnets having 16 hosts each."

realy it's : "we have a total of 14 subnets having 14 hosts each" Subnets will be
192.1.1.0 ----- 191.1.1.15 (1-14)
192.1.1.16 ---- 191.1.1.31 (17-31)
192.1.1.32 ---- 191.1.1.47 (33-46)
omit: Network ID and broadcast ID.
Ali

================= Q54=========
hi
the Q55 is a copy of Q54. and need to be deleted
thanks.
=============== Q65========
hi
I think there are two mistakes:
see "with the least usable host in the 192.168.32.32"
correct: "with the #last# usable host in the #192.216.32.32#"
change in: least to last and IP from 192.168.32.32 to 192.216.32.32

Ali
======================= Q70 ======
hi
I suggest this explanation for this Answer:
To calculate the subnet mask
1.Determine the number of subnets needed (5)
2.convert this number to binary (5=101)
3.Set all bits to 1. add 0s to complete the octet.(11100000)
4.Convert the custom mask value to decimal(224).
5.Add the custom mask to the default subnet mask.255.255.255.224
source: Testout CCNA 640-801 Course
==========================Q75 ======
Hi
here is a little mistake in Q75 Explanation:
/28 mask = 11111111.11111111.11111111.11000000
this is /26

correction:
/28 mask = 11111111.11111111.11111111.11110000

=============== Q124======
Hi
here is a little mistake in Q124:
You are a network technician at Certkiller . Your trainee wants to know which wireless data #command#

I think it should be "communication" not "command"

Ali

================= Q139 ==============
hi
the Q139 is a copy of Q132. and need to be deleted
thanks.
=============== Q147 =========
hi
F is a wrong answer see:
1.Different OSPF routers don’t have to use the same Process ID in order to communicate.
Sybex CCNA 5 Study Guide P342.

2.Unlike other protocols, the routing process ID's do not necessarily need to match in OSPF for routing to work.

========== the answer should be D ===
If two directly connected routers do not have the timers set the same, they will not form an adjacency.
Sybex CCNA 5 Study Guide P354.

================ Q179, 179 & 180 ============
hi
the Q176, Q179 and Q180 is a copy of Q3 P3 and need to be deleted
thanks.
Ali
======================== Q220=========

hi
the Q220 is a copy of Q28. and need to be deleted
thanks.
Ali

================= Q184 ==========
hi
the Q184 is a copy of Q83. and need to be deleted
thanks.

========== Q190 ========
Hi

here is a little mistake in Q190 Explanation:
Note: CSU/DSU can be used for Frame Relay, #ISDN,# and

Dedicated T1.

correction:
delete ISDN
====================== because:
1. you told:"ISDN uses a terminal adapter/NT"

2.DSL, ISDN, and Wireless wouldn’t be using a CSU/DSU
source: Sybex CCNA 5 Study Guide P585.

الرد منهم:

اقتباس:

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Dear Customer,
We are really appreciating to make such efforts regarding 640-821.
We suggest you one thing,why don't you study whole file and compile all questions(which you think should be edit) in one file and send us at the completion of your study ,it would helpfull to update our exams once throughly.


Kind Regards
TestGod Team
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