Which of the following statements is true of computer networks?

a. computer networks allow individuals to share many types of resources.
b. computer networks are inherently secure.
c. computer networks are not useful unless they are connected to the internet.
d. computer networks allow individuals to share hardware such as printers, but not software.

In vista and windows 7, the appearance and personalization option allows you to change the

Given a link with a maximum transmission rate of 32.8 mbps. only two computers, x and y, wish to transmit starting at time t = 0 seconds. computer x sends filex (4 mib) and computer y sends filey (244 kib), both starting at time t = 0. statistical multiplexing is used, with details as follows packet payload size = 1000 bytes packet header size = 24 bytes (overhead) ignore processing and queueing delays assume partial packets (packets consisting of less than 1000 bytes of data) are padded so that they are the same size as full packets. assume continuous alternating-packet transmission. computer x gets the transmission medium first. at what time (t = ? ) would filey finish transmitting? give answer in milliseconds, without units, and round to one decimal places (e.g. for an answer of 0.013777 seconds you would enter "13.8" without the quotes)

In simple terms, how would you define a protocol?