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Shawn2012
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Joined: Thu Apr 26, 2012 3:41 pm

Exam Question

Tue Aug 27, 2013 5:47 am

Two hosts, A and B, are connected to a broadcast LAN. Select all the answers showing pairs of IP address/mask which would allow IP connection to be established between the two hosts.
A. A: 10.1.2.66/25 and B: 10.1.2.109/26
B. A: 10.2.2.1/23 and B: 10.2.0.1/22
C. A: 10.1.2.192/24 and B: 10.1.2.129/26
D. A: 10.2.1.0/23 and B: 10.2.0.1/22

What is the trick to select correct answers quickly?
 
pateutz
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Re: Exam Question

Tue Aug 27, 2013 9:22 am

# ipcalc 10.1.2.66/25
Address: 10.1.2.66 00001010.00000001.00000010.0 1000010
Netmask: 255.255.255.128 = 25 11111111.11111111.11111111.1 0000000
Wildcard: 0.0.0.127 00000000.00000000.00000000.0 1111111
=>
Network: 10.1.2.0/25 00001010.00000001.00000010.0 0000000
HostMin: 10.1.2.1 00001010.00000001.00000010.0 0000001
HostMax: 10.1.2.126 00001010.00000001.00000010.0 1111110
Broadcast: 10.1.2.127 00001010.00000001.00000010.0 1111111
Hosts/Net: 126 Class A, Private Internet

# ipcalc 10.1.2.109/26
Address: 10.1.2.109 00001010.00000001.00000010.01 101101
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Wildcard: 0.0.0.63 00000000.00000000.00000000.00 111111
=>
Network: 10.1.2.64/26 00001010.00000001.00000010.01 000000
HostMin: 10.1.2.65 00001010.00000001.00000010.01 000001
HostMax: 10.1.2.126 00001010.00000001.00000010.01 111110
Broadcast: 10.1.2.127 00001010.00000001.00000010.01 111111
Hosts/Net: 62 Class A, Private Internet
 
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tomaskir
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Location: Slovakia

Re: Exam Question

Tue Aug 27, 2013 11:12 am

As mentioned, you can use the internet or any software on your PC during a MikroTik exam.

Simply put it into an IP Calculator on the web or on your PC and see if the IP pairs can communicate directly.
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Shawn2012
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Joined: Thu Apr 26, 2012 3:41 pm

Re: Exam Question

Thu Aug 29, 2013 9:22 pm

Thank you very much, Pateutz.

So, still no shortcut, really has to calculate one by one and compare. Time consuming.

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