Configuring Numbered Extended IPv4 ACLs Quiz
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Questions and Answers

Where should the ACL be placed if the objective is to prevent traffic from 192.168.10.0/24 network to reach 192.168.30.0/24 network?

  • At the source of traffic (correct)
  • At the destination network
  • In the middle of the network infrastructure
  • At the edge of the network

    • In ACL placement, what factor might influence where an ACL is placed?

  • Color of the network devices
  • Time of day when attacks occur
  • Type of cables used in the network
  • Extent of network administrator's control (correct)

    • What does a standard ACL placed at the source of traffic apply to?

  • Source and destination addresses equally
  • Source address for all destinations (correct)
  • Destination address for all sources
  • Neither the source nor destination address

    • In which example scenario would an extended ACL be more suitable?

    <p>Denying Telnet and FTP traffic from PC2 to Company B's PC3</p> Signup and view all the answers

    What is the purpose of an extended ACL compared to a standard ACL?

    <p>Filter specific traffic based on protocols, ports, and addresses</p> Signup and view all the answers

    How does placing an ACL close to the source of a network benefit security?

    <p>Minimizes undesirable traffic before it enters the network infrastructure</p> Signup and view all the answers

    What is the purpose of the 'Source quench' ICMP message?

    <p>Throttles down traffic when necessary</p> Signup and view all the answers

    Which ICMP message should be allowed to exit the network to enable users to ping external hosts?

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

    In the context of ICMP messages, what is the purpose of the 'Parameter problem' message?

    <p>Informs the host of packet header problems</p> Signup and view all the answers

    Why should all other ICMP message types be blocked as a rule?

    <p>To ensure proper network operation</p> Signup and view all the answers

    What is one of the primary purposes of an ACL in the context of ICMP messages?

    <p>To selectively allow specific ICMP services to exit or enter the network</p> Signup and view all the answers

    'Introducing IPv6 ACLs' suggests a transition from which protocol to which protocol?

    <p>IPv4 to IPv6</p> Signup and view all the answers

    What is the command to create a numbered extended ACL?

    <p>R1(config)# access-list access-list-number {deny | permit | remark text} protocol source source-wildcard [operator {port}] destination destination-wildcard [operator {port}] [established] [log]</p> Signup and view all the answers

    What are the steps for configuring extended ACLs compared to standard ACLs?

    <p>Steps for configuring extended ACLs are the same as standard ACLs</p> Signup and view all the answers

    Which command is used to apply an extended IPv4 ACL to an interface?

    <p>Router(config-if)# ip access-group</p> Signup and view all the answers

    What does the 'established' parameter signify in extended ACL configuration?

    <p>It indicates that only established connections are considered</p> Signup and view all the answers

    In extended ACL syntax, what does 'access-list-number' refer to?

    <p>Decimal number of the ACL</p> Signup and view all the answers

    What is the purpose of using the 'log' parameter in extended ACL configuration?

    <p>To track and log any permitted traffic</p> Signup and view all the answers

    What is the primary advantage of Classic Firewall over ZPF?

    <p>Blocks traffic by default unless explicitly allowed</p> Signup and view all the answers

    In ZPF design, what does the establishment of policies between zones involve?

    <p>Defining sessions that clients in source zones can request from servers in destination zones</p> Signup and view all the answers

    Why is it mentioned that policies are easy to read in the context of ZPF?

    <p>As a result of requiring only one policy for any given traffic</p> Signup and view all the answers

    What is a common ZPF design mentioned in the text?

    <p>LAN-to-Internet connections</p> Signup and view all the answers

    What is a key step in designing ZPF according to the text?

    <p>Establishing physical infrastructure after identifying zones and traffic requirements</p> Signup and view all the answers

    How does ZPF differ from Classic Firewall regarding traffic handling?

    <p>Classic Firewall blocks traffic unless explicitly allowed</p> Signup and view all the answers

    What is the purpose of the ACL named SURFING?

    <p>Allow inbound traffic on port 80 and 443</p> Signup and view all the answers

    How is the ACL named BROWSING applied in the configuration?

    <p>Outbound on interface G0/0</p> Signup and view all the answers

    Which command is used to apply an ACL to an interface?

    <p>ip access-group {acl-# | name} {in | out}</p> Signup and view all the answers

    What is the purpose of the named ACL VTY_ACCESS in the configuration?

    <p>Permit traffic from 192.168.10.10 and deny all other traffic</p> Signup and view all the answers

    What does the 'established' keyword in an ACL rule signify?

    <p>It allows only established connections to pass through</p> Signup and view all the answers

    What is the significance of using the 'log' parameter in an ACL rule?

    <p>It records information about permitted traffic for monitoring purposes</p> Signup and view all the answers

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