Which of the following is not a disadvantage of proxy servers?
a. Not all network services can be filtered.
b. The proxy server can run slowly.
c. Adding services can be difficult.
d. There can be a potential problem with network failure if the proxy server fails or is corrupted.
a. Not all network services can be filtered.
Explanation: A disadvantage to packet filtering is that not all network services can be filtered. The disadvantages of the proxy server are it can run slow, adding services can be difficult, and there can be a potential problem with network failure if the proxy server fails or is corrupted.
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