<{p}>Which HTTP response code is returned when a web
server requires authentication to access a resource?<{br/}><{/p}>
发布于 2021-03-19 17:30:37
【单选题】
A <{p}>500<{/p}>
B <{p}>401<{/p}>
C <{p}>302<{/p}>
D <{p}>100<{/p}>
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