Communications
Transferring files
The early communications between computers began with computers communicating with computers over phone lines. When the internet began, phone lines provided the only way individuals with computers could use the internet. Today few people still use phone lines because a twisted pair of wires can not support the extremely high speed needed to transfer the data contained in a picture.
Transferring
The internet is not supplied by a set of main computers. The internet itself is the connection between millions of WANs around the globe.
Communications
Telnet is a protocol for transferring plain text over TCP .
internet is a collection of inter-related computers,where as computer networks is a collection of automated(independent) computers.
1. TCP provides reliable, ordered and error-checked delivery of a stream of octets between programs running on computers connected to a local area network
Portability and easily available.. Low cost..reusableuseful for transferring data or files between computers
code 66 is a non specific communications failure between computers
Because floppy disks are obsolete, and CD-roms are more inconvenient.