Rephrase the text. $**1.$ Complexity and Maintenance Burden:$**$

$-$ ACLs and firewalls require precise configuration and regular maintenance to ensure they effectively filter network traffic. As organizations expand and evolve, managing and updating ACL rules can become complex and time$-$consuming, increasing the risk of errors or misconfigurations.

$**$Example:$**$ When new services or servers are added to the network, ACL rules need updating to allow or restrict access. Failure to update rules correctly could lead to unauthorized access or service disruptions.

$**2.$ Limited Granularity and Flexibility:$**$

$-$ ACLs and firewalls operate at the network layer, filtering traffic based on IP addresses, ports, and protocols. This limited granularity can hinder the implementation of fine$-$grained access controls for specific users or applications, making it challenging to enforce advanced security policies.

$**$Example:$**$ Restricting access to a specific web application to certain departments or roles within an organization may be difficult with traditional ACLs and firewalls due to their limitations in granularity.

$**3.$ Single Point of Failure:$**$

$-$ Relying solely on ACLs and firewalls creates a single point of failure. Misconfigurations, malfunctions, or successful attacks on these defenses can compromise the entire network.

$**$Example:$**$ Exploiting a firewall vulnerability could allow an attacker to manipulate rules and gain unauthorized access to the network, emphasizing the need for additional security layers.

$**4.$ False Positives$/$Negatives and Performance Issues:$**$

$-$ Firewalls can inadvertently block legitimate traffic $($false positives$)$ or allow malicious traffic $($false negatives$),$ leading to disruptions or security risks. High traffic levels can also impact firewall performance, potentially slowing down network operations.

$**$Example:$**$ Blocking a legitimate business application as a threat or experiencing network slowdowns due to high traffic volumes are common issues organizations may face with firewalls.

In conclusion, while ACLs and firewalls are vital for network security, understanding their limitations and implementing additional security measures is crucial to mitigate risks effectively. Regular audits, monitoring, and a comprehensive security strategy can help address the negative aspects associated with ACLs and firewalls within an organization.