【单选题】
A <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>Land 攻击<{/td}>
<{/tr}><{/tbody}><{/table}>
B <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>Smurf 攻击<{/td}>
<{/tr}><{/tbody}><{/table}>
C <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>Ping of Death 攻击<{/td}>
<{/tr}><{/tbody}><{/table}>
D <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>ICMP Flood<{/td}>
<{/tr}><{/tbody}><{/table}>
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