Ben is preparing to implement a firewall for his network and is considering whether to implement an open source firewall or a proprietary commercial firewall. Which of the following is NOT an advantage of an open source firewall?

Commercial firewalls usually entail greater vendor support and maintenance than their open source counterparts. This means that in the event of any problems, you may not have a vendor to fall back on, and will instead have to rely on a support community for updates and patches. Although open source firewalls are often less costly, their open source nature allows anyone to validate the code by examining it, and they can be downloaded and acquired quickly.