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In this section, we are going to learn about
telnet and ssh.

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What is the function of telnet and ssh?

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Before we talk about telnet and ssh, we need
to remember that if we want to configure cisco

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devices, we need a console cable.

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In packet tracer, we can configure the cisco
router or switch using tab CLI like this,

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but in the real device, we need to use a console
cable.

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Let’s try it, in cisco packet tracer, this
blue cable is console cable.

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So here let’s connecting the router to the
pc using console cable.

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In the pc choose rs232.

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This is a serial port in the pc, and then
in the router let’s choose console port.

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Next, to remote the router, we can open the
pc, desktop, and then open the terminal.

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Here let’s just choose ok.

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Okay here we have successfully remote the
router using console cable.

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So we can configure the router from here.

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The point is, if we want to configure the
cisco devices, we need to connecting the cisco

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devices to our computer using console cable.

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This is means if we want to configure the
cisco devices,

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we need to come to the location where is the cisco devices.

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Let’s say the cisco devices is in the data
center, so every time we need to configure

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the cisco devices, we need to come to Data
Center.

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Absolutely this is not effective, let’s
say we are in the vacation in another city,

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and suddenly there is a problem with our network
so we need to check it in the cisco devices,

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there is impossible to go to Data Center because
we are still in another city.

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To solve this problem, we can use telnet or
ssh.

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With telnet or ssh, we can remote the cisco
devices using network.

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For example here let’s say we want to remote
from pc vlan 10 in the room 2 to the router.

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This is possible using telnet or ssh.

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This is also work for the Data Center case.

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Let’s say we are in the another city and
need to remote the cisco devices in Data Center.

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This is possible using telnet or ssh.

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So we don’t need to come to Data Center
again every time we need to configure the

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cisco devices.

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But we can use telnet or ssh.

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So usually console cable is only used to doing
initial configuration,

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after we configure the ip address and enable telnet or ssh, we
no longer need to use console cable

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to configure the cisco router or switch, we can use telnet
or ssh.

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Okay I think enough for this video,

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in the next video we are going to learn how to configure telnet.

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Thankyou for watching and see you on the next
video.