2 Tristan emailed one of his teachers last night and is waiting for her to answer his questions. Should he check his messages today? A. Yes. He should email his teacher back promptly if she needs an answer from him. B. Yes. Teachers of online courses expect students to check their emails often. C. No. It is not necessary to check emails every day and it can interfere with other tasks. D. It depends. He should only check if he believes the teacher will get angry otherwise.

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.