It may be an image that is on the internet, without a caption visually impaired will not understand
In programming, a bug would be (B.) an error in a program's code.
In order for Rob to connect to the network,be must check all the connections he has in order to verify if it is physical problem or not. Let Rob check the wires and all the necessary devices like the routers and switches. If its not physical problem then check if the packets have gone out to the different layers of the network.