What is the best explanation of MPLS, Metro Ethernet, E1/T1, and Sonet?
What is the meaning and concept of these different WAN technologies: (a) Metro Ethernet (b) VSAT (c) Cellular 3G / 4G (d) MPLS (e) T1 / E1 (f) ISDN (g) DSL (h) Frame relay (i) Cable (j) VPN?