Aproduction web server is experiencing performance issues. upon investigation, new unauthorized applications have been installed and suspicious traffic was sent through an unused port. endpoint security is not detecting any malware or virus. which of the following types of threats would this most likely be classified as?
(a) buffer overflow vulnerability
(b) advanced persistent threat
(c) botnet
(d) zero day

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.