COMPUTER THREATS SECURITY
WHAT IS A FIREWALL IN NETWORK SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Session ID
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Username and password
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MAC address
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IP address
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Detailed explanation-1: -Also known as the network layer, the third layer of the OSI model is the same where routers operate. Therefore, layer 3 firewalls are able to monitor and filter traffic using the same protocols as routers. They can scan traffic based on Internet Protocol (IP) address, port addresses and similar router-based protocols.
Detailed explanation-2: -Static Packet Filter This type of firewall decides whether to accept or deny individual packets, based on examining fields in the packet’s IP and protocol headers.
Detailed explanation-3: -Layer 3 Firewalls (Network Firewalls) One way is to categorize traffic according to IP addresses, port numbers and service protocols. In other words, you could tell your firewall to accept traffic from certain IP addresses while blocking all other traffic (this would constitute a whitelisting strategy).
Detailed explanation-4: -A packet filtering firewall is a network security technique that regulates data flow to and from a network. It is a security mechanism that allows packets to move across networks while controlling their flow through the use of a set of rules, protocols, IP addresses, and ports.