200-125考題求解答

liusin72920

478.For which two reasons might you choose chassis aggregation instead of stacking switches? (Choose
two)
A. to allow hot-swapping modules
B. to increase the number of devices in use
C. to avoid the use of a centralized configuration manager
D. to avoid relying solely on Ethemet interfaces
E. to increase the maximum port count
Answer: AB
此題我在另一個購買的網站上，答案是「BC」

486.At which severity level can syslog logging begin to affect router performance?
A. debugging
B. emergency
C. notification
D. critical
Answer: D
此題我在另一個購買的網站上，答案是「B」

QUESTION 439
What are the two statements about EUI-64 addressing? (Choose two)
A. A locally administrated address has the universal/local bit set to 0.
B. A 64-bit interface identifier is derived from the interface MAC address
C. A 96-bit interface identifier is derived from the interface MAC address
D. The address includes the hex digits FFFE after the first 24 bits of the interface MAC address
E. The address includes the hex digits FFFE after the last 24 bits of the interface MAC addressAnswer: BD
此題我在另一個購買的網站上，答案是「AD」

因為明天要考試了，急！！！
請教以上三題的正確解答是哪個呢，感激不盡

小乔

你说的另一个答案 是抄袭的我们的题库  那些答案都是我们题库原先的答案  现在是经过改正后的答案
然而他们新答案没有抄上

liusin72920

感謝版主的回覆！！

malcolm2018

求解中

mr123

感謝

david99022

參考別的網站的答案時，要自己去判斷對錯，不然你會發現很多答案都不一樣，畢竟官方沒有給正確答案。我來分析一下~
478.For which two reasons might you choose chassis aggregation instead of stacking switches?
A. to allow hot-swapping modules
B. to increase the number of devices in use
C. to avoid the use of a centralized configuration manager
D. to avoid relying solely on Ethemet interfaces
E. to increase the maximum port count

A>正確，機箱式設備才可以支援熱插拔卡版
B>痾...兩種設備都可以增加number of devices....機箱式靠插卡版，stacking靠stack模組擴充，先保留
C>錯誤，兩種設備都在追求統一管理，機箱式靠Supervisor管理，stacking靠邏輯IP管理
D>錯誤，兩種設備都有光跟電的介面
E>錯誤，兩種設備都可以增加最大介面數量。
這樣看下來選AB好一點@@


486.At which severity level can syslog logging begin to affect router performance?
A. debugging
B. emergency
C. notification
D. critical

官網文件寫的Error messages about software or hardware malfunctions, displayed at levels warnings through emergencies: these types of messages mean that the functionality of the access point is affected.
代表從 warning開始就會影響設備了，所以選 warning(含)以上的選項。BD都對，既然這樣，就選最嚴重的emergency，所以這題我選B。


QUESTION 439
What are the two statements about EUI-64 addressing? (Choose two)
A. A locally administrated address has the universal/local bit set to 0.
B. A 64-bit interface identifier is derived from the interface MAC address
C. A 96-bit interface identifier is derived from the interface MAC address
D. The address includes the hex digits FFFE after the first 24 bits of the interface MAC address
E. The address includes the hex digits FFFE after the last 24 bits of the interface MAC address

這題考Ipv6裡的EUI-64 addressing，那就來解題吧。
A>錯的，EUI-64是自動生成的IP，不需要管理者去調整
BC>Ipv6自動生成的IP組成是64bits的前綴+EUI-64=128bits的IP，而EUI而EUI-64是跟MAC有關的，這題選B
DE>組成方式是本機mac(48bits)+FFFE(16bits)插在mac48bits的中間，然後再微調一下(與本題無關)。那答案就會是D的first 24 bits
所以這題答案是BD

呼，解完這三題了，不過你已經考完試了，就提供給其他人參考吧

Micklu

Micklu