Answer:
RS422-A or RS-485
Explanation:
Mode Name: RS422-A
Well, this is the electrical interface. The microprocessor covers the logics to electrical signals, and these electrical signals are then transmitted over a long distance, which is less than 4000 feet through RS422-A. And this is a half-duplex mode with the multidrop receiver and one transmitter at a time, in master-slave format. A receiver is a slave and the transmitter is a master. And there can only be one transmitter at a time. Here, a PC collects the videos from all cameras, through a unified system, and this PC is connected to numerous receivers which are the Screens. Parallel transmission cannot be done over a single line, and it's noisy as well, and hence we stick to serial mode. and here half-duplex as one at a time need to deliver, and not both. Hence, RS422-A is the first mode. which is a half-duplex serial transmission mode.
Reason 1:
It's noiseless
Reason 2:
The number of receivers can be as high as 10.
As the second alternative option:
Mode Name: RS-485
This is even better and allows receivers as high in number as 32, and hence is better than RS-422A. The maximum distance allowed is around 4000 feet, and the rest is the same as RS-422A. it also supports half-duplex.
Reason 1: It's less noisy and even better than RS422-A
Reason 2: number of receivers, and as high as 32 are allowed.
Remember, however, Ethernet is a low distance network, though it also supports collision detection, and multiple access/ carrier detection or CSMA/CD. However, for this question requirement RS-422A and RS-485 network interface will work fine. In the case of ethernet, we have an Ethernet Interface card, which works as an Ethernet network interface. However, Ethernet is a short distance, and will not work here.
