The seven interfaces commonly used in the SONET hierarchy are VT-1.5, VT-6, OC-1, OC-3, OC-12, OC-48, and ________.
Fill in the blank(s) with correct word
Question 2
The purpose of the metallic shield on coaxial cable includes all of the following except:
A) limit the radiation or bleeding of the signal out of the cable
B) carry the signal
C) act as an electrical return path
D) offer protection against interference such as electromagnetic forces and cross talk