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Reset Administrator Password On A Cisco Router With SNMPRecently, a fellow Cisco administrator told me about a tool he had used to reset a password on a router.… -
Convert an IP Address from Decimal to Binary FormDecimal to binary conversion is an important task to understand in IP addressing and Subnetting. IP addressing is a core…
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Routers, Switches & Firewalls – Learn how they are differentIf you are used to working with home networking gear you are used to an integrated device that “does it…
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How to Edit Cisco IOS ACL’s Using Line NumbersIn our previous series on Cisco IOS Access-lists Part 1 and Part 2 , we covered all the basics of…
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How a Cisco Switch functions on an Ethernet networkMany of us use switches every day but never really think about how they work. Whether you are studying to…
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How to Setup VLAN Trunking Protocol (VTP) on Cisco SwitchesHow to Setup VLAN Trunking Protocol (VTP) on Cisco Switches In our last article about VLAN’s (Read ore about it…
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How Router Interfaces get their names on Cisco RoutersWhy is your router’s Ethernet interface called Ethernet0/0 on one router but Ethernet 3/0 on another router? Where do these…
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Use TFTP to Backup your Cisco Router ConfigurationsJust like any important server on your network, Cisco routers and switches need to be periodically backed up. You don’t…
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How to Configure Local Username Database in Cisco IOSIn this article, we will take a step further in securing our Cisco router by using a local username /…
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What you need to know about BGP routing protocolPerhaps you are thinking that you could care less about some routing protocol called BGP. Could it possibly have anything…
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How to Configure Passwords to Secure your Cisco RouterMaybe you have a new router or you want to verify that you have security properly configured on your existing…
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How to Recover a Lost Password on a Cisco SwitchLost the password to your Cisco switch? David Davis walks you through how to recover that password (and your sanity).
