1. The networks underlying the Internet are digital or analog?

2. In contrast to the Internet, what was the type of networks were built in the 19th and 20th centuries for the world's telephone systems?

(a): Circuit-switched

(b):Wired

(c): Long-distance

(d):Dedicated circuit

(e): Packet-switched

3. All networks are connected together with technologies that are inherently fixed bandwidth.(T/F)

4.The devices that pool packets from many incoming connections together to share a single outgoing connection are called:_____________.

5.All devices that connect to the network are hosts, whether they're end-user devices or large servers in data centers.(T/F)