单项选择题
A. service timestamps debug datetime msec
B. show clock detail
C. clock calendar-valid
D. service timestamps log datetime msec
单项选择题 On which options are standard access list based?（）
单项选择题 A network administrator needs to configure a serial link between the main office and a remote location.The router at the remote office is a non-cisco router. How should the network administrator configure the serial interface of the main office router to make the connection?（）
单项选择题 What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?（）