642-832J Free Dumps Study Materials
Question 1: あなたはネット ワーク内の 2 つの NTP サーバを持っています - 10.1.1.1 と 10.1.1.2.あな
たが 10.1.1.1 に落ちる 前に、その NTP サーバ ーとして 10.1.1.2 を使 用するように Cisco ルー
タを設定します。どのコマンドはルータの設定に使用しますか?
A. ntp server 10.1.1.1 ntp server 10.1.1.2
B. ntp server 10.1.1.1 ntp server 10.1.1.2 primary
C. ntp server 10.1.1.1 ntp server 10.1.1.2 prefer
D. ntp server 10.1.1.1 fallback ntp server 10.1.1.2
Correct Answer: C
Explanation:
Preferred server A router can be configured to prefer an NTP source over another. A preferred
server's responses are discarded only if they vary dramatically from the other time sources.
Otherwise, the preferred server is used for synchronization without consideration of the other time
sources. Preferred servers are usually specified when they are known to be extremely accurate. To
specify a preferred server, use the prefer keyword appended to the ntp server command. The
following example tells the router to prefer TimeServerOne over TimeServerTwo: Router#config
terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#ntp server
TimeServerOne prefer Router(config)#ntp server TimeServerTwo Router(config)#^Z