JN0-304单项选择题每日一练(2019.01.11)

单项选择题
Within a BGP confederation how are routing loops avoided?（）
A. split horizon
B. the AS-path attribute
C. the BGP cluster ID attribute
D. the BGP originator ID attribute
单项选择题
Given the following policy, what happens when the 1.1/17 route is evaluated?（）[edit policy-options] policy-statement test{ from { route-filter 0/0 orlonger accept; route-filter 1.1/17 upto /24 reject; route-filter 1.1/18 exact; }then { metric 6; accept; }
A. The route does not match this policy.
B. The route is accepted.
C. The route is rejected.
D. The route is accepted with a metric of 6.
单项选择题
Which mechanism does External BGP use to prevent the formation of routing loops?（）
A. AS path
B. Split horizon
C. Poison reverse
D. Unicast RPF check
单项选择题
By default, which IS-IS metric types does JUNOS software support?（）
A. receiving of wide metrics only
B. sending of narrow metrics only
C. receiving of narrow metrics only
D. sending and receiving of narrow and wide metrics
单项选择题
What happens to the 66.66.66/24 route when it is evaluated by this policy? （）
A. The route does not match this policy.
B. The route is rejected.
C. The route is accepted.
D. The route is accepted, then rejected.