For an IP address of 210.76.193.4 and a Netmask of indicate which are the correct network and host components of the address Network 210.76.128.0 and host Network 210.76.193.0 and host 210.76.193.4 Network 210.76.192.0 and host Network 0.0.0.0 and host 210.76.193.4 Network 210.76.193.4 Host The FTP protocol uses two TCP channels for operation. Which statement best describes how they are used. The two channels permit one channel to be used for sending and one for receiving files. The two channels allow for a higher bandwidth, and thus faster transmission times, than using one channel alone. One channel is used for data and one for commands. This ensures that data is never confused with commands, and also allows the user interface to be located on a different computer from the file systems. While one channel is used for data the second channel allows the user to continue web browsing while a download is transferred. with the digital TV switch over FTP now gets hundreds of channels as opposed to the two we used to have when FTP was devised. An application uses UDP for data when: Speed and not reliability is required Speed and reliability are required Slowness is required Accuracy of data delivery is required UDP is never used by applications Question 39 2 pts HTTP uses which port number: 21 23 25 43 80 What is the difference between in-band signalling and out-of-band signalling