Which type of intrusion detection system (IDS) is uncommon due to implementation costs?

Which type of intrusion detection system (IDS) is uncommon due to implementation costs?

• A. Network-based intrusion detection system (NIDS).
• B. Application-based intrusion detection system.
• C. Host-based intrusion detection system (HIDS).
• D. Open system interface (OSI) layer 4 IDS.

Answer: (B)

Application-based intrusion detection systems are indeed considered less common primarily due to their implementation costs. These systems are designed to monitor and analyze the behavior of applications to detect potential intrusions or abnormal activities. The complexity involved in tailoring application-based IDS to specific applications or environments often necessitates substantial investment in resources and expertise for setup, maintenance, and ongoing tuning. In contrast, network-based intrusion detection systems (NIDS) and host-based intrusion detection systems (HIDS) tend to be more widely implemented because they can leverage existing infrastructure more effectively and often involve lower operational costs. NIDS monitor network traffic and can cover multiple devices without the need for extensive modifications to individual systems, while HIDS are installed on specific hosts, making them more straightforward in terms of deployment and maintenance. The mention of an OSI layer 4 IDS refers to the tactical position within the OSI model where certain network behaviors can be monitored, but the term itself is not typically used to categorize intrusive detection systems in the same context. Thus, application-based IDS stands out for the specific challenges and costs associated with their implementation, making them less common in practice.

Application-based intrusion detection systems are indeed considered less common primarily due to their implementation costs. These systems are designed to monitor and analyze the behavior of applications to detect potential intrusions or abnormal activities. The complexity involved in tailoring application-based IDS to specific applications or environments often necessitates substantial investment in resources and expertise for setup, maintenance, and ongoing tuning.

In contrast, network-based intrusion detection systems (NIDS) and host-based intrusion detection systems (HIDS) tend to be more widely implemented because they can leverage existing infrastructure more effectively and often involve lower operational costs. NIDS monitor network traffic and can cover multiple devices without the need for extensive modifications to individual systems, while HIDS are installed on specific hosts, making them more straightforward in terms of deployment and maintenance.

The mention of an OSI layer 4 IDS refers to the tactical position within the OSI model where certain network behaviors can be monitored, but the term itself is not typically used to categorize intrusive detection systems in the same context. Thus, application-based IDS stands out for the specific challenges and costs associated with their implementation, making them less common in practice.