#1

How to connect to real routers and switches

putty

When remotely accessing a router, to get to the CLI

putty → SSH to connect to it’s management ip address

AAA server

authentication, authorization, accounting server

difference between telnet and SSH

encryption

out of band management

management network → separate from production network

• It ensures administrators maintain remote access to troubleshoot, reboot, or reconfigure devices even during primary network outages, power failures, or security incidents. 

Initial connection to Cisco Device

• don’t usually have a default ip-address so we need to add one

• default speed is 9600

default setting when using putty

• speed 9600

• 8 data bits

• 1 stop bit

• flow control none

• parity none

Calculate number of available networks

2^subnet-bits

Calculate number of hosts

2^subnetbits-2

OSI model

• physical

• data link

• network

• transport

• session

• presentation

• application