This depends on the router but I wouldn't normally (except for on a high end router) expect it to be more than 1. I would recommend looking at the manufacturers website or manual.
The number of sessions supported is dependent on the router hardware.
Simultaneous 5 telnet sessions supports by default.
5
two
The router can handle as many telnet sessions as there are VTYs. The maximum number of possible VTYs varies by platform. There are 5 VTYs by default, you can add more VTYs by configuring them in configuration mode. Example Line vty 0 16 login (or any command) Once you refer to a VTY, it will be created.
Because the telnet session is in clear text and programs can capture the passwords to log in to telnet sessions.
show sessions
Telnet operates over TCP Port 23.
Show sessions command
port 23
for
No, it does not.
TCP has no default port. Individual applications - such as FTP, DNS, or Telnet - do have default ports.
In order to be able to telnet to a computer, it has to be running a telnet daemon or service. Windows XP does not run such a service by default. It can be activated (in the Professional version at least) in the Services console.
i think is Telnet