[多选] Which two statements about the Wired Equivalent Privacy （WEP） encryption mechanism are true？（）

A . the two methods of authentication using the WEP encryption are open and shared key
B . the 802.11 standard defines WEP security using 128-bit keys
C . WEP can provide stronger authentication through the use of LEAP， PEAP， or EAP-FAST
D . WEP is a scalable encryption solution that uses static keys for authentication
E . WEP security provides only one-way authentication
F . WEPv2 offers improved encryption by replacing the RC4 encryption mechanism with the AES （symmetric block cipher） mechanism

非交互作用 In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?（） after broken links are re-established。 in an improperly implemented redundant topology。 when upper-layer protocols require high reliability。 during high traffic periods。 when a dual ring topology is in use。简述学前儿童呼吸系统的卫生保健措施。前练习说帝国主义瓜分中国图谋破产的根本原因是（）。列强之间的矛盾和相互制约。中国人民的反侵略斗争。帝国主义国家中正义力量的干涉。中国自给自足的经济社会结构。 Which two statements about the Wired Equivalent Privacy （WEP） encryption mechanism are true？（）

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[多选] Which two statements about the Wired Equivalent Privacy （WEP） encryption mechanism are true？ （）

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[多选] Which two statements about the Wired Equivalent Privacy （WEP） encryption mechanism are true？（）