NETWORK SECURITY
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Deny all except specified hosts
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Allow all except specified hosts
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Allow access to only specified destination servers
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Deny access to all destinations except specified servers
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Detailed explanation-1: -Which of the following is a type of packet filtering used by firewalls that retains memory of the packets that pass through the firewall? Stateful packet inspection. A firewall running stateful packet inspection is normally not vulnerable to IP spoofing attacks because it examines the header in each packet.
Detailed explanation-2: -A Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization’s previously established security policies. At its most basic, a firewall is essentially the barrier that sits between a private internal network and the public Internet.
Detailed explanation-3: -Also, because it examines only the packet headers, attackers can bypass the static packet filter with simple spoofing techniques, since the filter cannot tell the difference between a true and a forged address.