CMS专题
单选题Which of the following options best justifies why a DNS server should be run in a large network system？（）A To use ftp and telnetB To perform NFS mountsC To make /etc/hosts files unnecessaryD To reduce network traffic and save bandwidth
题目
To use ftp and telnet
To perform NFS mounts
To make /etc/hosts files unnecessary
To reduce network traffic and save bandwidth
相似问题和答案
第1题：
Which of the following is BEST for providing network security?（）
- A、Firewall
- B、DMZ
- C、Switch
- D、IDS
正确答案:A
第2题：
An administrator is attempting to recover from a power failure in the data center. Which of the following is the BEST way to recover the servers？（）
- A、 Bring up the WINS server， the DNS server， then the web server
- B、 Bring up the web server， the time clock server， then the DHCP server
- C、 Bring up the backup tape server， the DNS server， then the web server
- D、 Bring up the active directory server， the DNS server， then the web server
正确答案:D
第3题：
On AIX systems， where DNS resolution takes precedence over NIS， a particular process needs to resolve names using /etc/hosts first. Which of the following processes is the best way to accomplish this without affecting the rest of the system’s name resolution？（）
- A、Set the NSORDER environmental variable of the environment which invokes the process to：NSORDER="local，nis，bind"
- B、Set the NSORDER environmental variable of the environment which invokes the process to： NSORDER="hosts=auth，nis，bind"
- C、Edit /etc/netsvc.conf to add a line similar to the following： process /full/path/of/process {hosts=local，nis，dns}
- D、Unset NSORDER environment variable of the environment which invokes the process
正确答案:A
第4题：
In an iostat report， which of the following options best describes the value of % idle？（）
- A、 A representation of the equation （tps/kbps）*100
- B、 The percentage of time the disks are idle with no activity
- C、 The percentage of time the disks are idle with no outstanding CPU requests
- D、 The percentage of time the CPU is idle with no outstanding disk I/O requests
正确答案:D
第5题：
Which of the following protocols would BEST grant the user secure access to a remote location?（）
- A、VPN
- B、FTP
- C、POP3
- D、DNS
正确答案:A
第6题：
Which of the following BEST describes the function of a DNS server?（）
- A、Secures network traffic through shared key encryption.
- B、Provides resolution of host names to IP addresses.
- C、Provides security for a network through the use of ACLs.
- D、Dynamically assigns IP addresses for easy client configuration.
正确答案:B
第7题：
A user can no longer launch their word processing program. The program worked fine yesterday.Which of the following options could BEST be used to fix the word processing program?（）
- A、Safe Mode
- B、Automated System Recovery
- C、Last Known Good Configuration
- D、System Restore
正确答案:D
第8题：
In an iostat report， which of the following options best describes the value of % tm_act？（）
- A、 The total CPU usage for this drive
- B、 The bandwidth utilization of the indicated drive
- C、 It can best be represented by the equation （%iowait - %ioidle）
- D、 It can best be represented by the equation （kilobytes read/kilobytes written） *100
正确答案:B
第9题：
On a system wide basis， which of the following procedures is best to make NIS name resolution take precedence over DNS？（）
- A、Remove the /etc/resolv.conf file
- B、Unset the NSORDER environment variable
- C、Add the following line to /etc/netsvc.conf： hosts=nis，bind，local
- D、In a NIS and DNS environment， NIS takes precedence so there is nothing to change
正确答案:C
第10题：
Which of the following "no options" controls the maximum value of mbufs？（）
- A、mtu
- B、sb_max
- C、thewall
- D、tcp_sendspace
正确答案:C