NETWORK SECURITY
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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packet filtering
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stateful packet inspection
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NAT filtering
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Application-level gateway
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Detailed explanation-1: -The packet filtering firewall filters IP packets based on source and destination IP address, and source and destination port.
Detailed explanation-2: -A packet-filtering firewall is a type of firewall that filters network traffic to block any packets that carry malicious code or files. To understand this, here’s some background: Data packets are the primary unit used for transferring data between networks in telecommunications.
Detailed explanation-3: -Application Level gateway proxy firewall This system inspects traffic at the Application layer of the TCP/IP stack. It works as a separate host with its own IP address, which intercepts the traffic request received by the network.
Detailed explanation-4: -Packet filtering firewall However, these firewalls don’t route packets; rather they compare each packet received to a set of established criteria, such as the allowed IP addresses, packet type, port number and other aspects of the packet protocol headers.
Detailed explanation-5: -Application filtering-Prevents or allows access by specific application types based on port numbers.