Which of the following statements is true of intranets?
a. they are grids consisting of private, public, academic, business, and government networks.
b. they are accessible only to authorized individuals through an organization's portal.
c. they are open systems and are accessible to all users surfing the web.
d. their functionality is restricted to organizing employee information and distributing announcements.

b.

Explanation:

An intranet is like a "private Internet" that mediates the access to some sensitive information spread out in different web pages and documents, using the TCP/IP protocol suite, through an access portal, to which only authorized individuals can access.

To anyone able to access the portal, all documentation is accessible as it were on the public Internet, which allows for instance, to a partner in Argentina to access in a secure way, in real time, to track a PO issued to a company in Singapore.

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: