Which of the following is not true about firewalls?
A) A firewall might be either hardware, software, or a combination of both.
B) A personal firewall, which comes on most home computers, is software designed to make your computer invisible to others by closing all access points into the computer.
C) A bidirectional firewall is one that blocks unauthorized access both into and out of your computer, protecting against hackers and also blocking spyware transmission from your computer to another unauthorized computer.
D) A firewall protects your computer against authorized access of hackers, individuals who intentionally try to access your computer without authorization.
D
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The ________ layer covers the traditional network-oriented management functions of fault, configuration, accounting, and performance management.
A) Management capabilities B) Application C) Network D) Service support
How many different orders can all four messages be delivered to each process if the messages are causally related as m11 -> m21 -> m12 -> m22
Suppose a multicast group currently is participated by two processes: P1 and P2. Suppose P1 multicasts m11 then m12, P2 multicasts m21 then m22.