1. The command show controllers serial [interface number]can be used to determine whether your serial interface is a DCE or DTE interface. An abbreviated listing of the displayed results for the show controllers serial 0 command is shown. The Serial0/0 interface is a V.35 DCE cable. This command should be used when you have an RJ-45 connection.
2. The V.35 cables are typically labeled to indicate whether they are a DTE or DCE cable.
3. Inspect the end of the V.35 cable to determine whether it is made (DTE) or female (DCE)
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Port 80 is generally configured to be the connecting port for web servers. Home routers aren't generally designed for hosting so port 80 is probably blocked by default but can be forwarded.
The best way is to attach a serial port using device to the serial port of your computer and use your preferred program to send data to the device
80 is the default port for web (HTTP) services.
No. VGA port is not either serial or parallel port. It is a different interface. If you need a serial output, you need a VGA to serial converter.
It's called a COM port.
AUX port
Depends on how many switches each router takes. You need a router to connect all the other routers, and then enough switches to make 81. For example, you can use 6 16 port routers to connect the computers and 1 8 port router to connect those routers together
FastEthernet Port Serial Port
No. Its a parallel port
universal serial bus port
USB port, serial port, parallel port.