Networking asignment

Hi guys,
Just started a new assignment in college and I need a little help with this criteria:

To describe the importance of data elements in a networked system in a report. They may include checksum, CRC, frames, packets, sequence numbers, datagrams…

Ok, you should open a text processor, and then hit the keys on the keyboard randomly or in a planned out process, until you form words found in the English dictionary.
Need any more help? If so, ask a proper question..