Cisco 642-542 exam study guide：
1. When using PC-based IP phones, which threat is expected between data and voice segments if not protected by a stateful firewall?
A. TCP flood DoS attack
B. IP spoofing attack
C. UDP flood DoS attack
D. application layer attack
Answer: C
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2. Which IDS guidelines should be followed, according to SAFE SMR?
A. use TCP shunning as opposed to TCP resets
B. use shunning no longer than 15 minutes
C. use shunning on only UDP traffic, as it is more difficult to spoof than TCP
D. use shunning on only TCP traffic, as it is more difficult to spoof than UDP
Answer: D

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