A remote user is trying to telnet to the production server. The session is getting a timeout error. Which command should the user issue to verify the network connection？（）
A、iptrace
B、nslookup
C、netstat
D、traceroute
以下选项中不合法的标识符是（ ）。
A、print
B、FOR
C、&a
D、_00
Referring to the exhibit, which statement is correct?（）
A、 The packets have exceeded the time-to-live value
B、 There is a loop
C、 The asterisks indicate a response time out
D、 The asterisks indicate that the traceroute is completed.
Which CLI command shows if the router has formed any IS-IS adjacencies?（）
A、show clns neighbor
B、show isis neighbor
C、show clns adjacency
D、show isis adjacency
（）像表一样由列组成，其查询方式与表相同，但是不包含数据。
A、同义词
B、视图
C、索引
D、过程
Which directory does the Junos OS use to store syslog information by default?（）
A、A/ar/messages
B、A/ar/syslog
C、/var/tmp
D、/var/log
