campus network design basic problem confusions

[shivajikobardan]

Design the redundant network for Purdue University with 4 departments including ISP which are around 300m apart from each other. Three departments have 4 labs each with 24 computers in each room . ISP contains server farm with server like DNS, DHCP, Email, FTP, NMS(wtf is NMS), and webserver and the main internet router which will be connected to upstream provider. Propose appropriate equipment(L1,L2 and L3) and physical wires for the network design.

---

here are the files of solutions, i have read and tried to understand all of them. i have understood subnetting. i have understood network design as well, but even though i am dumb, i can tell that most of the network design drawn here is wrong. so i am asking this question here, hope to get help.

https://file.io/m2WVY3Bd1VkX

backups-:

https://fromsmash.com/pdfsolution

(tell me if there is a good site to share these stuffs w/o signups).

The question is clearly asking me to design the 3 layer networks i.e distribution, core and access layer. And some of the questions ask to be redundant. The problem is I have seen a whole book on redundant network design and not just few guidelines that would help me in this small topic of my course. (The topic weight is just 8% of the entire final exam). I love reading and would definitely read 1000 pages of top down network design sadly there are restrictions in real life. It would take me 3-6 months to finish that book all on my own.

---

so here's the subnetting solution-:

let's take ip address 192.168.0.0

total required hosts=294

2^x-2=294=> x=7

/## will be /25

D1-:

192.168.0.0/25 - 192.168.0.127/25 (I will only keep network address-broadcast address here, rest can be found pretty easily from it)

D2-:

192.168.0.128/25-192.168.0.255/25

D3-:

192.168.1.0/25-192.168.1.127/25

ISP-: ( I took number of hosts as just 6 although it says ISP contains a main router. Should I consider a router as a host? Or is it different? My books don't consider it as a host. Isn't router just a computer? thus a host?)

192.168.1.128/29-192.168.1.135/29

---

now there are lots of questions.

for a moment, forget the redundant network design.

forget the L1,L2,L3 design,and let's do a basic level design.

View attachment 42086

This is the stupid design I made.(of I know this is not real n/w)

D1 means department1.

L1 means lab1.

*24 means 24 hosts

*6 means 6 servers

the one is ISP is main router.

---

what the answer according to my book(it is very unauthentic book with plenty of mistakes, depending on that book to learn sth is a learning suicide, it's not written by any reputed professors. This book is a huge scam in our university where they don't teach anything in classes, don't help students so that we buy these books. And isn't even written by best quality professors. Tbh best quality professors never stay in our country, they just get opportunity to move abroad.)

1) Main router-:

a) router for D1(that uses network address)===> switch1--->24 hosts

b) router for D2====>switch2===>24 hosts

c) router for D3===>switch3===>24 hosts

d) router for ISP===>switch4===>6 hosts

is this correct? if this is correct, could you give a small explanation of this system? i feel this is correct. but why are we using another router in ISP when ISP already has main router? a brief explanation would be helpful.

now say I want to make this design redundant.

I make everything two times. would not that work lol?

---

The devices required will be-:

1) Main router

2) Switch

3) Optical fiber

4) CAT6 cable

5) Laptops

6) Servers

7) wireless router (why and where is this required? any ideas what use this will have here?)

---

Hope to get help. This is a long question but the answer to this is short as I am just asking that n/w design part. And we don't have to make networks in laptop, we just need to design in theory.

 

[mstenholm]

Things have changed since I attended university. Back then you did your homework your self in order to learn.

 

[shivajikobardan]

Things have changed since I attended university. Back then you did your homework your self in order to learn.

haha you must be standup comedian, this is good joke. but i am in university, everything i learn would be useful for the job, so i don't want to cheat. if i wanted to cheat, i would just memorize that pdf(open the files, it has the solution to the problem i am asking).

 

[Bill_Bright]

Things have changed since I attended university. Back then you did your homework your self in order to learn.

I agree - this sounds like a homework assignment and "free" tech support sites are not here for that.

haha you must be standup comedian, this is good joke.

No, he sounds like a responsible parent to me!

if i wanted to cheat, i would just memorize that pdf

LOL IMO, "memorizing" the source material is called "learning".

 

[shivajikobardan]

I agree - this sounds like a homework assignment and "free" tech support sites are not here for that.


No, he sounds like a responsible parent to me!



LOL IMO, "memorizing" the source material is called "learning".

thanks i don't think this is the right forum. (i had seen similar questions here that's why i asked).

 

[Bill_Bright]

(i had seen similar questions here that's why i asked).

And were they answered?

 

[Blue4130]

And were they answered?

Is asking for help any different than memorizing the pdf? He's not asking you to sit in on the exam for him.

 

[Bill_Bright]

He's not asking you to sit in on the exam for him.

And how do you know it is not a take-home test?

If you want to do the work for him - go for it! I sure am not stopping you. I just note this appears to be a homework assignment - and not just to me.

 

[shivajikobardan]

And were they answered?

yes

And how do you know it is not a take-home test?

If you want to do the work for him - go for it! I sure am not stopping you. I just note this appears to be a homework assignment - and not just to me.

it's not everyone's cup of tea to solve these problems in an irrelevant forum. stop acting. i am at the wrong forum and i am going out. stop trolling.

 

[Bill_Bright]

I was not trolling - I was answering Blue's question.

That said, this is hardly an irrelevant forum.

 

[95Viper]

Thread closed.

In the Future, Follow the Guidelines!

Posting in a thread

• Be polite and Constructive, if you have nothing nice to say then don't say anything at all.
  • This includes trolling, continuous use of bad language (ie. cussing), flaming, baiting, retaliatory comments, system feature abuse, and insulting others.
  • Do not get involved in any off-topic banter or arguments. Please report them and avoid them instead.
  • Healthy debates will generally be allowed if the following criteria is met.
    • Useful sources and constructive wording.
    • Maintain the topic that they're taking place in.
    • No insults, trolling, shaming, hate or toxicity.
    • Avoid political or religious comment unless it is specifically relevant to a topic and in those cases is only acceptable if done in an unbiased manner.
    • Once it is considered over, do not drag it on only to have the last word.
    • Short and pointless posts like "yeah", "me too" or "haha" can be made on the rest of the internet, not here. Post count doesn't increase your e-penis.
• Stay on topic, changing the topic won't help the discussion. Feel free to create a new thread instead.
• If you reply to multiple posts use the "multi quote" button, that way the forum is easier to read.

Also...

• All posts and private messages have a "report post" button on the bottom of the post, click it when you feel something is inappropriate. Do not use your report as a "wild card invitation" to go back and add to the drama and therefore become part of the problem.