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ID: 8926

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January 23, 2018, 12:24 pm


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The Network Intrusion

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A graph theory based puzzle for a Shadowrun Setting.

You and your Shadowrunner Team have been hired by the government to hack into the headquarters of the Comit-Corperation to locate evidence of illegal activity. They suspect that it is kept on a single secure server but their internal network is extremely secure and the government investigation agency could not retrieve any information on it except the following:


The network is divided into 10 subnets in which each IP Address is tied to the number of nodes on it.

192.168.2.0 -> 2 Nodes
192.168.3.0 -> 3 Nodes
192.168.4.0 -> 4 Nodes
192.168.5.0 -> 5 Nodes
192.168.6.0 -> 6 Nodes
192.168.7.0 -> 7 Nodes
192.168.8.0 -> 8 Nodes
192.168.9.0 -> 9 Nodes
192.168.10.0 -> 10 Nodes
192.168.11.0 -> 11 Nodes

They know that the suspect server is on the lowest numbered subnet that can satisfy the following conditions:

Each node has exactly LAN connections to 3 other nodes in that subnet.
The only exception to this is the suspect server which has a LAN connection to only 1 node.

You can ignore any WAN connections as those just connect subnets together and are therefore irrelevent.

Also there some other complications as well:

There are no topology diagrams of the network accessible anywhere.

You only have enough time to search a single subnet before the Intrusion Detection Systems spot your unauthorized access and lockdown the entire network kicking you off.

SOLUTION:
The suspect server is on subnet 192.168.6.0

How I know if this is correct? Becuase it is the only one that satisfys the conditions stated above. We know that each node has to have exactly three LAN connections on each except one which is the server. So by graphing this out there has to at least 6 nodes for all of the conditions to be satisfied.




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Comments ( 1 )
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Voted Cheka Man
January 24, 2018, 23:13
Only voted


Random Idea Seed View All Idea Seeds

"Who-Me?"

       By: Murometz

Five main ingredients were used to create this noxious, real-world (ridiculously named), chemical compound, featuring sulfur as the main ingredient. The odor was said to be akin to rotting refuse, decomposing carcasses, and fecal matter. "Who-Me?" Was developed during WW II by the OSS to aid the French Resistance against the Germans. The idea being to utterly humiliate and ultimately demoralize the enemy by making them stink of garbage left to rot under a hot sun.

The bizarre experiment did not last long however as "Who-Me?" could not be administered on select targets (controlled), without making everyone in a certain radius, friend, foe, and sprayer alike, stink as well

Ideas  ( Articles ) | July 2, 2015 | View | UpVote 3xp


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