这两道题选什么， 为什么

kkkggg21cn

186上的这两道题选什么， 为什么
5. By default, which of the following names are most appropriate for the NIS map versions of the /etc/passwd file?
A. password.dir and password.pag
B. /etc/passwd.NIS and /etc/security/password.NIS
C. /etc/passwd.byname and /etc/security/passwd.byuid
D. password.byname.pag, password.byname.dir,
password.byuid.pag, and password.byuid.dir

这道题我找不到答案
3. All of the following are generally involved with looking up addresses for public Internet hosts except:
A. DNS
B. NIS
C. An /etc/hosts file
D. /etc/resolv.conf file

此题与我的理解不相符
thanks a million

kkkggg21cn

5 找到了答案与答案一致是D

3我认为是D

yuwei0322

第二道题是不是应该选b 呀，我从句子的翻译是除了哪一个，其余与查找网络地址有关。