单项选择题
An IS-IS router is adjacent to and passing traffic with a neighbor. You perform a show isis interface detail command and notice that for some interfaces you have a circuit type of 3. Which IS-IS level(s) is enabled on these interfaces?（）
A. Level 1 only B. Level 2 only C. Level 1 and Level 2 D. Level 3 only
单项选择题 Which method should be used to dynamically elect an RP when your network is using PIM version1?（）
单项选择题 By default, what does a Juniper Networks router set the BGP origin code to when originating theroute?（）
单项选择题 In JUNOS software, which type of VPN supports IPX and Appletalk?（）
