علي2060
11-01-2006, 15:04
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
======= 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