Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

This question already has an answer here:

Is it correct to say that there are 2 subnets in the network in the image below?

http://i37.tinypic.com/2cwpy83.png

share|improve this question

marked as duplicate by MadHatter, ThatGraemeGuy, Dan, EEAA, Dave M Apr 25 '13 at 12:23

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1  
there are 6 subnets here. not sure this question meets the rules... –  kafka Apr 25 '13 at 10:14
    
Why are there 6 subnets? –  user171131 Apr 25 '13 at 10:15
    
assuming that these are all class C /24 networks there is: 223.1.1.X, 223.1.9.X, 223.1.7.X and so on –  kafka Apr 25 '13 at 10:16
    
yh, that cleared it up, thanks for the links and responses! –  user171131 Apr 25 '13 at 10:45

2 Answers 2

up vote 2 down vote accepted

One might imply that there are multiple subnets from the diagram by the inclusion of routers which often indicate the boundry between two subnets, but they don't have to. They would almost certainly indicate multiple broadcast domains.

All the IP addresses could belong to the 223.1.0.0/16 network. Without knowing what subnet has been configured on each host you can't say for sure from the information given.

share|improve this answer

6 subnets.

Once thing to note, is that some of the ip address doesn't make any sense. If this image is purely displaying subnets, then, the reason why there is six is because of the routers on the network. So if you count the amount of links between the routers and pc's you get 6.

share|improve this answer
1  
+1, you should not have any IP addresses ending in .0, and each segment is a subnet, even if only 2 addresses (rtouer-2-router 255.255.255.252) –  David Houde Apr 25 '13 at 11:24
    
so the amount of links determine how many subnets? –  user171131 Apr 25 '13 at 11:36
    
Not always, you can have physical failover links, but the number of logical links can be seen as number of subnets, if that makes sense. –  Danie Apr 25 '13 at 11:54

Not the answer you're looking for? Browse other questions tagged or ask your own question.