nice... Thumbs bro.. Following closely.. And learning real good. Good bless you all

Ok if no one posts a solution to the subnet problem by Saturday, I'll post it. Blessings to you

Fulaman198:


We don't want it to be male dominated, please become a Network Engineer as well

I hope this story inspires you: http://www.cisco.com/web/SG/partners/emails/woman_rock_it.html

I just feel that women don't want to get involved in it. If you want to be a Network Engineer, I don't know what path you decided to go with in Comp sci, but I would recommend taking the Networking track with Security.

Many Thanks.

@neekyberry: You can do it. Just be determined and be focused.
There is a lady in my office Who passed the CCIE lab exam in April.

NeekyBerry:


Many Thanks.

timiekay:
@neekyberry: You can do it. Just be determined and be focused.
There is a lady in my office Who passed the CCIE lab exam in April.

WOW. That's all the inspiration I need. Thank You!

Just believe in yourself.
You can be one of the very few women Who achieved this certification.

NeekyBerry:


WOW. That's all the inspiration I need. Thank You!

Fulaman198:


No problem

i'm a bit challenged now: my phone got bricked wen i unknowingly wiped my cache...i'm nw using my backup nokia 120..the subnetting assignment is quite tricky for me...

Kavalier5:


i'm a bit challenged now: my phone got bricked wen i unknowingly wiped my cache...i'm nw using my backup nokia 120..the subnetting assignment is quite tricky for me...

Sorry I didn't post a resolution over the weekend. I have been looking at other computing things that have been keeping me quite busy. I will post a solution soon and an explanation of the problem.

Fulaman198:


Sorry I didn't post a resolution over the weekend. I have been looking at other computing things that have been keeping me quite busy. I will post a solution soon and an explanation of the problem.

thanks!!..

are you doing it in kano? am in kano and i will like too know about networking.

omaji53jeremiah:
are you doing it in kano? am in kano and i will like too know about networking.

Only online for now and I'm in Abuja not Kano.

Fulaman198:


Only online for now and I'm in Abuja not Kano.

Where in abj do u reside, fulaman?

Fulaman198:

Only online for now and I'm in Abuja not Kano.

i sent you an email sir..

Kavalier5:

i sent you an email sir..

Sorry I'll respond to you soon

Mr Fulaman, Pls what is ur email address? I need some things asap.

amarawa:
Mr Fulaman, Pls what is ur email address? I need some things asap.

You can click on my name and send me the message. In that case I'll respond to whenever I can.

YUSUPH1986:
I luv computer related field but it is unfortunate that i am nt science inclined. Even, av bin to an ict manager to hep put me through abt programming bt when i was asked about wc aspect i wil like 2 venture in i was jxt luking like a lukosade because i tod them all. Pls i felt i like dis cisco of a tin. Pls Can sum1 tel me the important of it xo that i can know and eventually fal in luv wit it. Thanks

Believe in yourself and all things are possible.

I believe that you are only as good as you want to be. If you think are you are not inclined in maths and sciences then you won't be. However, if you believe in yourself and your own ability, you can do anything. Sometimes, it just takes extra discipline and extra push to get where you want to. But I know that if you think with an end in mind all things are possible.

Fulaman198:


With that said, since no one else is taking this assignment as seriously as you, your next assignment is to read about Subnets, Subnetting and VLSM (Variable Length Subnet Masking).

Here is the problem I want you to solve, Fulaman has just opened up a new company in Kaduna called New World Network Engineers. The company is comprised of 750 employees. As a result, you, a Junior Network Engineer has been placed in charge of the IP assignments which will be on a 10.10.4.0/22 IP address assignment.

The IP address assignments are as follows: 400 people are normal workers, 70 Workers are Engineers, 100 workers work in maintenance, 15 work in HR, 30 work in Engineering, 50 in QA, and the other 85 work in Technical support. How would you as the Junior Network Engineer assign IP addresses to these departments. What is the range that you will use for each department. Provide the IP address host range, network address, broadcast address and Subnet Mask for each range.

Ok, this problem has been up for too long and no one has solved it yet. Come on guys....

ok let's go over it.

I stated in the problem that there are a total of 750 employees. In this problem since there are different departments and we are assigned an address space of a /22 Network, we immediately know that we have enough IP address space for 1,022 employees. How do I come up with that figure? Well it's simple.

Do you remember the formula for finding hosts on a network based on borrowed subnet bits? It's (2^n - 2) Since this is a /22 network, we have borrowed 10 bits for subnetting. Therefore, we have (2^10) - 2 hosts which is 1022. Remember, an IPv4 Address is 32-bits.

The problem states that we are given the internal Network IP address of 10.10.4.0/22 for IP address space. Therefore we have to use VLSM (Variable Length Subnet Masking).

In order to calculate IP address space for each department, we start off with the department that requires the most IP address space first. The Normal Workers require the most IP address space, so we start with them. There are 400 people, so which subnet mask will be enough to accommodate 400 workers? A /23 will give us enough IP address space for 400 workers. A /23 gives us IP address space for 510 workers. The subnet mask for a /23 is 255.255.254.0.

So with 10.10.4.0, we have our Network Address, the host IP address space will be anywhere between the range 10.10.4.0 - 10.10.5.254 (These are the usable IP addresses for all hosts for normal workers) The broadcast address would be 10.10.5.255.

Next, we have maintenance workers that are the second largest group of people that require IP addressing. We know that the Network address for this subnet is the previous broadcast address incremented by 1, therefore, the Network Address is 10.10.6.0. The Subnet mask needs to be enough to accommodate 100 IP addresses. Which subnet mask can accommodate 100 IP addresses easily? 255.255.255.128 or a /25 network. A /25 subnet can accommodate 126 host IP addresses. So now, we have to look for the viable host range of IP addresses and the broadcast IP address.

The host range of IP addresses for the Maintenance dept. would be 10.10.6.1 - 10.10.6.126 (keep in mind the last IP address of a host range is always an even number and the broadcast number is always an odd number). The broadcast IP address is 10.10.6.127 for the maintenance dept.

The next highest range of IP address is the Tech support dept. with 85 workers. We need a subnet mask that can accommodate 85 workers. We know that our Network address is 10.10.6.128, but what's our subnet mask? Again, it's a /25 because a /25 can accommodate 126 workers. Therefore, our subnet mask is 255.255.255.128. Our viable host range will be 10.10.6.129 - 10.10.6.254 with a broadcast address of 10.10.6.255.

Remember when assigning IP address space to depts, you will always want to go from largest to smallest. This is good for real-world practice because as network engineers, you will constantly be working with IP address assignments.

Next largest IP address space goes to the Engineers. There are a total of 70 workers in that dept. We need a big enough subnet IP address assignment to allocate the necessary amount of IP addresses to them. Again, a /25 subnet mask would be ideal for this assignment. Our Network Address would therefore be 10.10.7.0/25 (or alternatively 10.10.7.0 255.255.255.128). The usable range of host IP addresses would be 10.10.7.1 - 10.10.7.126. Our broadcast address is 10.10.7.127.

We have 2 more departments that we must allocate IP addresses to. There was an error that 30 work in Engineering. We already did Engineering. The two depts left are QA and HR.

QA has 50 workers so we must allocate IP address space to them first. What subnet would be large enough to accommodate 50 workers? Well, a /26 subnet mask should be more than enough. With a /26 subnet mask, we have enough IP address allocation for 62 workers.

For the QA dept, the Network Address is 10.10.7.128/26 (or alternatively (10.10.7.128 with a subnet mask of 255.255.255.192). The range of hosts for the IP addresses would be 10.10.7.129 - 10.10.7.190. The broadcast address would be 10.10.7.191.

Last and also least, we need to allocate IP addresses to the HR dept. which is comprised of 15 workers. What subnet mask can allocate enough space to 15 workers? Well 255.255.255.224 or alternatively /27 CIDR. For the HR dept., our Network Address is 10.10.7.192. We need to find the host range of usable IP addresses therefore the viable host range would be 10.10.7.193 - 10.10.7.222. The broadcast address is 10.10.7.223.

To conclude, the explanations and answers have been given but I'll now give the answers in short hand:

Normal Workers:
Network Address: 10.10.4.0
Subnet Mask: /23 or 255.255.254.0
Host range: 10.10.4.0 - 10.10.5.254
Broadcast Address: 10.10.5.255

Maintenance:
Network Address: 10.10.6.0
Subnet Mask: /25 or 255.255.255.128
Host range: 10.10.6.1 – 10.10.6.126
Broadcast Address: 10.10.6.127

Tech Support:
Network Address: 10.10.6.128
Subnet Mask: /25 or 255.255.255.128
Host range: 10.10.6.129 – 10.10.6.254
Broadcast Address: 10.10.6.255

Engineers:
Network Address: 10.10.7.0
Subnet Mask: /25 or 255.255.255.128
Host range: 10.10.7.1 – 10.10.7.126
Broadcast Address: 10.10.7.127

QA Dept:
Network Address: 10.10.7.128
Subnet Mask: /26 or 255.255.255.192
Host range: 10.10.7.129 – 10.10.7.190
Broadcast Address: 10.10.7.191

HR Dept:
Network Address: 10.10.7.192
Subnet Mask: /27 or 255.255.255.224
Host range: 10.10.7.193 – 10.10.7.222
Broadcast Address: 10.10.7.223

Does anyone need any further explanation on what was done to arrive at these IP addresses? I would be more than happy to further explain how it works.

Mr Fula, I have sent u a message

amarawa:
Mr Fula, I have sent u a message

Ok, I'll check it out. Thanks!

amarawa:
Mr Fula, I have sent u a message

I don't see your message, please re-send it.

I've resent it. Does this nairaland mail work? I saw it entered ur gmail. But mine is ptoall1000@gmail.com. u could send me ur phone no via it.

amarawa:
I've resent it. Does this nairaland mail work? I saw it entered ur gmail. But mine is ptoall1000@gmail.com. u could send me ur phone no via it.

Yeah, I received it and I responded promptly.

Before I go to work,

I just wanted to add one concept and discuss it because recently I have been implementing it a lot.

It's called IPv6.

As you know IPv6 addresses are in hexadecimal and are 128-bit addresses as opposed to 32-bits (which is what IPv4) addresses are.

Often they would appear like this:

2001.17A4.F2E8.2471::1/64

I will go into more detail later. GTG duty calls see you all.

In regards to IPv6 addresses they were created to address the fact that we are running out of IPv4 address space worldwide.

To count the bits in an IPv6 address (which is 128 bits) it's as follows

XXXX.XXXX.XXXX.XXXX.XXXX.XXXX.XXXX.XXXX

Each X = 4 bits

Thus, there are 16-bits in a hextet (remember in an IPv4 address, there are 32 bits, and each octet is comprised of 8 bits, because an IPv4 address has this format AAA.AAA.AAA.AAA in decimal form)

In regards to IPv6 addresses, if we go by Mathematics, they utilise the Hexadecimal number system, or Base 16.

So that means you count as follows:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F

A = 10 (in decimal)
B = 11 (in decimal)
C = 12
D = 13
E = 14
F = 15

Often hexadecimal is written like this to symbolise a number e.g. 0x0C = 12, that's how it's written in hexadecimal.

More to come so I don't confuse you guys

Fulaman198:

Yeah, I received it and I responded promptly.

I really can't find your response. Can u sms me on 09097070310?

@fulaman198 u are doing a great job in here! Kudos to u

Advanced Information Security

Marshiro:
@fulaman198 u are doing a great job in here! Kudos to u

Thanks man, I appreciate it.

Good morning mr fulaman....
Been following this thread right from page 1... I'd love to be a network admin, so what are the things I'm suppose to know to be a network admin?
Thanks

Plz guy I so wanna learn dis cisco networking stuff I base in lagos nd I would be so very greatful if someone can at least point me in d right direction plz guys somebody should help a brother in need

Fulaman198. nice work here. i need some help on troubleshooting my MPLS network. I have a hub and spoke setup where i run EIGRP. I need to do a hairpin routing at the hub so i can get to the other spoke routers. the problem is that i encounter traffic drop at the hyb router. I believe that split-horizon is messing up my traffic as EIGRP is a distance vector-routing protocol.
Any advice will be welcomed