What purpose did the first commercial modem serve? A.
It provided a way to stay competitive in the international technoscape.

B.
It provided a way for the military to transmit data.

C.
It provided a way for separate networks to connect to one another.

D.
It exposed the need for anti-virus measures and attack self-replicating viruses.

1. which of the following statements are true about routers and routing on the internet. choose two answers. a. protocols ensure that a single path between two computers is established before sending packets over it. b. routers are hierarchical and the "root" router is responsible for communicating to sub-routers the best paths for them to route internet traffic. c. a packet traveling between two computers on the internet may be rerouted many times along the way or even lost or "dropped". d. routers act independently and route packets as they see fit.

What is transmission control protocol/internet protocol (tcp/ip)? software that prevents direct communication between a sending and receiving computer and is used to monitor packets for security reasons a standard that specifies the format of data as well as the rules to be followed during transmission a simple network protocol that allows the transfer of files between two computers on the internet a standard internet protocol that provides the technical foundation for the public internet as well as for large numbers of private networks

Use a physical stopwatch to record the length of time it takes to run the program. calculate the difference obtained by calls to the method system.currenttimemillis() just before the start of the algorithm and just after the end of the algorithm. calculate the difference obtained by calls to the method system.currenttimemillis() at the start of the program and at the end of the program so that the elapsed time includes the display of the result. use the value returned by the method system.currenttimemillis() just after the end of the algorithm as the elapsed time.