[Sebesta10] As discussed in the class on the implementation of subprogram (call and return). Local variables can be accessed by their offset from the beginning of the activation record, whose address is in the . This offset is called the local_offset. The local_offset of a local variable can be determined by the compiler at compile time.

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.