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What should Bob recommend to deal with such a threat?

Some clients of TPNQM SA were redirected to a malicious site when they tried to access the TPNQM main site. Bob, a system administrator at TPNQM SA, found that they were victims of DNS Cache Poisoning.

What should Bob recommend to deal with such a threat?
A . The use of security agents in clients’ computers
B . The use of DNSSEC
C . The use of double-factor authentication
D . Client awareness

Answer: B

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