Search Computer Help Please

Thursday, December 17, 2009

Paypal Echeque Problem Solution - Keeps asking for Credit Card

A quick guide to a common paypal echeque problem that occurs when you try and make a payment using a paypal echeque and it keeps prompting you for updated card details or insists that you add a new card.

An easy solution is to go out and yourself a GIFT CARD Credit Card with a 50 dollar credit on it and use it to make instant payments from your bank account.

Simply login at paypal.com

Click on My Account
- Profile
- Add or Edit Credit Card



Once you are in this window make sure you remove any credit cards that have been stored in paypal that may be expired and affecting your paypal echeque payment method.

Monday, December 14, 2009

How to Supernet -Supernetting Tutorial - CCNA IP Supernetting

Supernetting is a core skill needed for the Cisco CCNA certification and basically involves taking two IP addresses and combining them into a minimized network and subnet to make network management easier as well as making it easier for routing protocols and troubleshooting network problems.

An example of IP supernetting

we have a network 172.24.0.0

___128___64___32____16____8____4____2_____1________

|
24|
31|

Here we have to networks in different subnet mask that can be combined using supernetting
172.24.0.0 /24 and 172.24.0.0 /31

The first thing we need to do is draw a simple table so that we can convert the /31 and /24 network into binary so we can break it down




We then look at the binary sequences and draw a line when they are no longer the same



Everything that doesn't match will be converted to zero

gives us
0 0 0 1 1 0 0 0 in BINARY

the orignal IP un-supernetted was 172.24.0.0

it is now /13 or 255.248.0.0

8 + 5 = /13 ,
255 + (128.64.32.16.8) = 248
255.248.0.0

There you have it the supernetting guide hope it wasn't too confusing let me know if you have any questions

172.24.0.0 with network /24 and /31 becomes
172.24.0.0 /13 - 255.248.0.0

Computer Help Please