ping is a computer network tool used to test whether a 
particular host is reachable across an IP network. It works 
by sending ICMP “echo request” packets to the target host 
and listening for ICMP “echo response” replies. ping 
estimates the round-trip time, generally in milliseconds, 
and records any packet loss, and prints a statistical 
summary when finished.





TELNET (TELecommunication NETwork) is a network protocol 
used on the Internet or local area network (LAN) 
connections. It was developed in 1969 beginning with RFC 15 
and standardized as IETF STD 8, one of the first Internet 
standards.

The term telnet also refers to software which implements 
the client part of the protocol. TELNET clients have been 
available on most Unix systems for many years and are 
available for virtually all platforms. Most network 
equipment and OSs with a TCP/IP stack support some kind of 
TELNET service server for their remote configuration 
(including ones based on Windows NT). Because of security 
issues with TELNET, its use has waned as it is replaced by 
the use of SSH for remote access.

"To telnet" is also used as a verb meaning to establish or 
use a TELNET or other interactive TCP connection, as 
in, "To change your password, telnet to the server and run 
the passwd command".

Most often, a user will be telneting to a Unix-like server 
system or a simple network device such as a switch. For 
example, a user might "telnet in from home to check his 
mail at school". In doing so, he would be using a telnet 
client to connect from his computer to one of his servers. 
Once the connection is established, he would then log in 
with his account information and execute operating system 
commands remotely on that computer, such as ls or cd.

On many systems, the client may also be used to make 
interactive raw-TCP sessions, even when that option is not 
available, telnet sessions are equivalent to raw TCP as 
long as byte 255 never appears in the data.



packet internet gopher (PING)
Definition

Method used in determining the response time of an internet 
connection. PING software sends a request to an website, 
and times the receipt of reply (echo) called pong. A part 
of the Internet Protocol, PING is not directly accessible 
to the user.

packet internet gopher (PING) is in the Data Management, 
Communications, & Networks and Internet & World Wide Web 
subjects.