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TCP Protocol States Quiz
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TCP Protocol States Quiz

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Questions and Answers

Which digit in the protocol state represents the server-side state?

  • Fourth digit
  • First digit (correct)
  • Second digit
  • Third digit

    • What is the value of the protocol state when a TCP session is in the FIN_WAIT state?

  • 1
  • 4 (correct)
  • 5
  • 0

    • What is the value of the protocol state when a TCP session is in the CLOSE_WAIT state?

  • 0
  • 1
  • 7
  • 6 (correct)

    • What is the value of the protocol state when a TCP session is in the LAST_Ack state?

    <p>8</p> Signup and view all the answers

    What is the value of the protocol state when a TCP session is in the LISTEN state?

    <p>9</p> Signup and view all the answers

    What is the value of the protocol state when a TCP session is in the SYN_SENT state?

    <p>2</p> Signup and view all the answers

    What is the value of the protocol state when a TCP session is in the SYN & SYN-Ack state?

    <p>3</p> Signup and view all the answers

    What is the value of the protocol state when a TCP session is in the TIME_WAIT state?

    <p>5</p> Signup and view all the answers

    What is the value of the protocol state when a TCP session is in the CLOSE state?

    <p>5</p> Signup and view all the answers

    What is the value of the protocol state when a TCP session is in the ESTABLISHED state?

    <p>1</p> Signup and view all the answers

    Which protocol has no session state in FortiGate?

    <p>ICMP</p> Signup and view all the answers

    What are the two session state values used by FortiGate for UDP traffic?

    <p>0 and 1</p> Signup and view all the answers

    What does the 'local' session flag indicate?

    <p>Session originated from FortiGate or terminates on FortiGate</p> Signup and view all the answers

    What happens to 'may_dirty' sessions after a change in the firewall policy configuration?

    <p>They are unaffected</p> Signup and view all the answers

    What is the default global session handling setting in FortiGate?

    <p>check-all</p> Signup and view all the answers

    What does the 'npu' session flag indicate?

    <p>Session can be offloaded to NPU</p> Signup and view all the answers

    What happens to a session flagged as 'block' in FortiGate?

    <p>It remains in memory until it expires</p> Signup and view all the answers

    What does the 'auth' session flag indicate?

    <p>Session requires (or required) authentication</p> Signup and view all the answers

    What is the purpose of the 'redir' session flag in FortiGate?

    <p>Session is being processed by an application layer proxy</p> Signup and view all the answers

    What happens to packets matching a session with the 'block' flag in FortiGate?

    <p>They are dropped</p> Signup and view all the answers

    Which option allows you to use policy-specific session handling settings?

    <p>check-policy-option</p> Signup and view all the answers

    What is the default option for session handling after a policy change?

    <p>check-all</p> Signup and view all the answers

    Which option is the most resource-intensive behavior for session handling?

    <p>check-all</p> Signup and view all the answers

    When enabling the check-new option, what does FortiGate do after a policy change?

    <p>FortiGate evaluates new sessions against modified policies</p> Signup and view all the answers

    Which option should be used if you have policies handling millions of sessions?

    <p>check-new</p> Signup and view all the answers

    What is the most granular setting for session handling?

    <p>check-policy-option</p> Signup and view all the answers

    What CLI commands can be used to modify the FortiGate session handling behavior?

    <p>set firewall-session-dirty</p> Signup and view all the answers

    Is the system-level session handling setting global or per-V-Dom?

    <p>Both</p> Signup and view all the answers

    What does the check-policy-option enable you to modify?

    <p>FortiGate firewall policy configuration</p> Signup and view all the answers

    When new packets arrive, what does FortiGate do with them after a policy change?

    <p>FortiGate reevaluates them before adding them to the session table</p> Signup and view all the answers

    Study Notes

    TCP Protocol States

    • 12th digit in the protocol state represents the server-side state
    • FIN_WAIT state: value is 6
    • CLOSE_WAIT state: value is 8
    • LAST_Ack state: value is 10
    • LISTEN state: value is 2
    • SYN_SENT state: value is 3
    • SYN & SYN-Ack state: value is 3 and 4
    • TIME_WAIT state: value is 6
    • CLOSE state: value is 7
    • ESTABLISHED state: value is 4

    FortiGate Session Handling

    • UDP traffic: session state values are 'new' and 'est'
    • 'local' session flag: indicates that the session was created by the FortiGate unit itself
    • 'may_dirty' sessions: are deleted after a change in the firewall policy configuration
    • Global session handling: default setting is 'keep'
    • 'npu' session flag: indicates that the session is offloaded to the NPU
    • 'block' session flag: blocks the session
    • 'auth' session flag: indicates that the session has been authenticated
    • 'redir' session flag: redirects the session to the specified IP address and port
    • Packets matching a session with the 'block' flag: are blocked by FortiGate
    • Policy-specific session handling: can be configured using the 'set SESSION-HANDLE' command
    • Default option for session handling after a policy change: 'keep'
    • Most resource-intensive behavior for session handling: 'reset'
    • Check-new option: enables FortiGate to reset sessions after a policy change
    • Option for handling millions of sessions: 'keep'
    • Most granular setting for session handling: per-policy level
    • CLI commands to modify FortiGate session handling behavior: 'config system session-helper' and 'config firewall policy'
    • System-level session handling setting: global
    • Check-policy-option: enables modification of the session handling behavior after a policy change
    • When new packets arrive after a policy change, FortiGate checks the new policy for the session

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    Description

    Test your knowledge of TCP protocol states with this quiz! Learn about server-side and client-side states, and their corresponding values. Challenge yourself to identify different TCP states like ESTABLISHED, SYN_SENT, FIN_WAIT, and more.

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