Introduction of Firewall in Computer Network

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Question 1

What is the primary function of a firewall in a network?

  • Increase internet speed

  • Monitor and control traffic based on security rules

  • Store backup data

  • Provide IP addresses to devices

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Question 2

Which of the following is considered a best practice for a firewall’s default policy?

  • Accept all traffic not matched by rules

  • Reject only outgoing traffic

  • Drop or reject traffic that does not match any rule

  • Ignore unknown protocols

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Question 3

Which type of firewall inspects packet headers and also tracks the state of active connections?

  • Stateful inspection firewall

  • Packet filtering firewall (stateless)

  • Proxy firewall

  • Web application firewall

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Question 4

In terms of placement, what is the main role of a perimeter firewall?

  • Protect only individual hosts inside the LAN

  • Enforce access rules at the boundary between internal and external networks

  • Filter traffic only between internal VLANs

  • Store logs for audit purposes only

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Question 5

Which historical development first enabled firewalls to evaluate the state of a connection rather than each packet independently?

  • Basic packet filtering in late 1980s

  • Creation of application-layer proxy firewalls

  • Introduction of circuit-level gateways at Bell Labs

  • Invention of stateful inspection technology in the early 1990s

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