先上原文，后面解释！
(In the old days, this question was a multi-choice question but Cisco upgraded it into a lab-sim question. Therefore, instead of listing all the configuration as above, you have to type show frame-relay map and show running-config to get its configuration)
Question 1:
What destination Layer 2 address will be used in the frame header containing a packet for host 172.30.0.4?
A – 704
B – 196
C – 702
D – 344
Answer: C
Question 2:
A static map to the S-AMER location is required. Which command should be used to create this map?
A – frame-relay map ip 172.30.0.3 704 broadcast
B – frame-relay map ip 172.30.0.3 196 broadcast
C – frame-relay map ip 172.30.0.3 702 broadcast
D – frame-relay map ip 172.30.0.3 344 broadcast
Answer: B
Question 3:
Which connection uses the default encapsulation for serial interfaces on Cisco routers?
A – The serial connection to the MidEast branch office
B – The serial connection to the DeepSouth branch office
C – The serial connection to the NorthCentral branch office
D – The serial connection to the Multinational Core
Answer: A
Question 4:
If required, what password should be configured on the router in the MidEast branch office to allow a connection to be established with the Dubai router?
A – No password is required
B – Enable
C – Scr
D – Telnet
E – Console
Answer: D
Explanation
关键就在这第四题，照下面翻译，大概就是，这道题没有固定的答案，而是需要你在考试的时候自己show running-config，把密码自己找出来，所以才有了很多版本的答案，作这道题还要注意的一点就是，注意S口使用的封装类型，PPP就要SHOW RUN找密码，如果是HDLC，那就直接选A吧，这个不用密码。
明天3月1号，明天就去考NA了，虽然没什么难度，但鉴于一直以前RP不咋样，所以还是祝自己好运，可不要明天就大变题啊。
这道题的出处，http://www.9tut.com/，分享给大家，这是一个国外的NA题库网，讨论的人好像还比较多，毕竟英文是人家的母语，有优势，对题的理解比我强多了，去看看说不定对你有帮助。
最后，祝大家也考试顺利！
This question is not clear for a long time but now maybe the trick was solved. What Cisco wants to ask is the word used as password, not the type of connection, so in the exam you might see some strange words for answers like “En8ble”, “T1net”, “C0nsole”. All you have to do is to use the command “show running-config” as wx4 mentioned below to find the answer.
wx4 commented:
Q4: if password required which?
in my example it was connection to North!
How to figure out which pw is required?
#show running-config
1. check the interface to the router you need connection to. If there is “ppp authentication” you need a password!
2. you will find the password on the top of your running-config output
check the area:
username North password c0nsole
username xxxxx yyyyy
username…
in my case it was c0nsole, in your case it can be no password needed or a different password.
If you are still not clear, please read anton‘s comment:
A big question I noticed here was about the FR Lab regarding the password. You have to perform a show running-config and look for USERNAME and PASSWORD.
i.e.
username South_Router password c0nsol3
username North_Router password t31net
Obviously this has to be en PPP encapsulation, if asked for a posible password for SOUTH_ROUTER you pick c0nsol3, and for NORTH_ROUTER you pick t31net. If you’re running HDLC, i would pick “no password is required”.