Question: (a) Distinguish between LANs and WANs. (b) Why do companies use carriers for WAN transmission? (c) What two WAN technologies are illustrated in the figure

(a) Distinguish between LANs and WANs.
(b) Why do companies use carriers for WAN transmission?
(c) What two WAN technologies are illustrated in the figure (Figure A-4)?
(d) Why is carrier WAN traffic generally considered safe?

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