题目内容
（请给出正确答案）
提问人：网友13***556
发布时间：2023年1月8日 20:58
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Refer to the exhibit.Which three statements are true about trust boundaries in the campus network？（）https://assets.asklib.com/images/image2/2018073014302987878.jpg
A . Classification and markingoccur using 802.1ab QoS bits before reaching the trust boundary.
B . A device is trusted if it correctly declassifies packets.
C . A device is trusted if it correctly classifies packets.
D . Network trust boundaries are automatically configured in IOS version 12.3 and later.
E . The outermost trusted devices represent the trust boundary.
F . For scalability， classification should be done as close to the edge as possible.
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