Im only in 4th sorry i dont think i can help
Answer:
Header files serve two purposes. System header files declare the interfaces to parts of the operating system. You include them in your program to supply the definitions and declarations you need to invoke system calls and libraries.
Answer:
Speakers.
Explanation: Cause they only output sound, and are devices, further more they are not used to output images, like how could speakers output images using sound? They can't.
Answer:
He should disable UPnP technology to disallow devices to dynamically add themselves to the network without configuration.
Explanation:
- UPnP stands for Universal Plug n Play.
- It is an easiest way that allows gadgets to find all other devices connecting to your network.
- This can also modify router settings to allow devices from outside the network to access the router.
- External IP address can also be obtained by the gadget and a new port forwarding map can be set
- So from all perspectives, UPnP is an open invitation for hackers to scan for the ports and hack into the device.
- UPnP is a vulnerability to the secure system
