$1.$ Which network type supports long$-$haul connections between ISPs?

$2.$ Which routing protocol is limited to $15$ hops?

$3.$ You just moved into a rural office space with telephone service but no cable. Which WAN service could

you use without installing new wiring to your location?

$4.$ Which cellular generation was the first to offer speeds up to $1$ Gbps$?$

$5.$ Explain briefly what cyclic redundancy checksum $($CRC$)$ is$.$