Explanation

The true potential of optical fiber is fully exploited when multiple beams of light at different frequencies are transmitted on the same fiber. 

Explanation

The long-distance carrier system provided in the United States of America and throughout the world is designed to transmit voice band signals over high-capacity transmission links, such as coaxial cable and microwave systems. 

Long-distance coaxial cable systems were introduced in the United States in 1946

Explanation

Long-haul, terrestrial optical fiber networks connect cities and countries throughout the world.

Explanation

Long haul installation connects one central office, or data center, to another.

Explanation

Error Control in the data link layer is a process of detecting and retransmitting the data which has been lost or corrupted during the transmission of data. 

Explanation

The basic function performed by a computer is execution of a program.

Taking data and instructions from a user, processing the data as per instructions, and displaying or storing the processed data, are the four major functions of a computer.

Explanation

The UNIVAC was the first commercial computer delivered to a business client, the U.S. Census Bureau in 1951.

Explanation

The 1950s saw the birth of the computer industry with two companies, Sperry and IBM, dominating the marketplace.

Sperry: 1955

IBM: 1952

Explanation

CPU interconnection is some mechanism that provides for communication among the control unit, ALU and registers.

CPU stands for Central Processing Unit. 

Explanation

Input and Output are used as a medium of communication between the external environment and the CPU.