Answer:

TELNET

Answer	Crossword Clue
TELNET	Web communications protocol
TELNET	Web protocol
TELNET	Early on-line protocol

TELNET	Online protocol for remote log-in
TELNET	PC communications link
TELNET	Early online protocol
TELNET	Internet transfer protocol
TELNET	Cyber communications link
TELNET	Early computer connection protocol
TELNET	Obsolescent online connection provider
TELNET	PC-linking program