In the 1960s, at& t created a service known as which multiplexed digital data and digitized voice onto a high-speed telephone line with a data rate of 1.544 megabits per second.

What are procedures that keep a data base current

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.

Which view in a presentation program displays a split window showing the slide in the upper half and a blank space in the lower half?