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DHCP Server

Scenario: You are a trainee and studying for your CCNA certification. Your boss asks you if you can configure a DHCP server for some wireless clients. Confident as you are you take one of your routers and start…

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Proxy ARP

Scenario: One of the trainees has configured your network and has assigned static IP addresses to all computer in the network. Unfortunately he made some errors and the computers are not able to reach each other. Think you…

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ODR (On Demand Routing)

Scenario: The international network of the Benelux doesn’t have any more fancy equipment since the last cost saving project. The current routers don’t support any routing protocol except ODR (On Demand Routing). You don’t want to use static…

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Recursive Routing Failure

Scenario: You work as the network engineer for a company with an ambitious plan to build a tunnel between Japan and Australia. To support this project you have to configure the network with some new routers. You configure…

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Reliable Static Routing Backup using Object Tracking

Scenario: You are looking at a small network with a HQ and Branch router. At the HQ there is a webserver located and many users from the branch office are accessing this webserver. Between HQ and Branch there…

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Floating Static Routes

Scenario: While you are drifting on a inflatable bed at your swimming pool you fall asleep and dream about floating static routes. There’s this issue at work you couldn’t solve but sometimes the best ideas arrive in your…

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Longest Prefix Match Routing

Scenario: The local matchstick factory needs your help. They added another link between their routers but now everything is being load balanced between the serial and FastEthernet interface. They want to make sure everything is sent down the…

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NAT PAT Overload

Scenario: Emma and Alice are in trouble. They just got a new Internet connection but they forgot to mention to the Internet provider that they required two public IP addresses so they both can access the Internet at…

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NAT Dynamic

Scenario: Your friends Jack and Joe recently switched to a new Internet provider and instead of getting a single public IP address they have received multiple global IP addresses. To make sure all global IP addresses are used…

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NAT Port Forwarding

Scenario: Your network at home has been configured for NAT so you and the rest of your family can access the Internet. You also have a webserver and a SSH server at home and you would like those…

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