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1) which description below best describes the purpose of computer firewalls?

a. they check the behavior of the packet and do not allow anything into the network.

b. they do not allow anything in the network and do not check a packet’s credentials.

c. they watch the incoming packet and do not allow anything into the network.

d. they check the incoming packet’s credentials and behavior of the packet.

2) why was the internet originally constructed?

a. to enable researchers to communicate

b. to provide online search capabilities

c. to enable online video sharing

d. as a law enforcement database

D). They check the incoming packet’s credentials and behavior of the packet.

(For the first one)

A). A. to enable researchers to communicate

(For the second one)

the answer is a

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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: