It is common practice not to store user’s password in clear text. However, if an attacker has seized control of the password database, he is likely already capable of modifying any user data on the site as an administrator. Why bother hashing the passwords then?

To prevent leakage of user's passwords.

Explanation:

I don't really know the premise of your question, but I assume it is this. If the hacker has access to the user's data, they may have the email address. If they cannot crack the password hash, then they may not attempt to login to the user's accounts on other websites.

given the options, i would say your best bet is c. the modem supports up to 56 kbps, which is too low for video streaming. dial up modems use actual phone lines, which only can go up to 56 kbps as that's more than sufficient for traditional phone calls. this is also the reason why when a dial-up modem connects, you hear all those sounds. it's literally using the phone line to establish a connection.

answer: internal fragmentation is the difference between the (fixed) size of a memory hole and the data within in that memory. for example, if a 1,024 byte block of memory holds 800 bytes of data, then the 224 bytes difference is considered lost to internal fragmentation.

external fragmentation occurs when the sum of memory fragments is large enough to satisfy a request, but the holes are non-contiguous and the request cannot be satisfied. this can occur when memory is dynamically allocated and freed.

explanation: