1、IPSec VPN

(1) IPSec itself does not specify which algorithm to use, but only provides the framework. Users can choose any algorithm supported, and if the algorithm is cracked, it can be replaced at any time. The parameters used are as follows:

<1> hash function: MD5, SHA1;
<2> encryption algorithm: DES, 3DES, AES;
<3> encapsulation protocol: AH, ESP;
<4> encapsulation...

Many students will ask before they take CCIE tests: What should I prepare? What ability should I have? What on earth should I do? Now, I'd like to give u my personal advice on some big aspects.

First of all, theoretically, you need to read as many books as you can. TCP/IP volume one, volume two must be read at least 2 times. You must completely understand those basic theories. There are many relevant books on the Internet, read, read,...

I'm now preparing for my Cisco CCNP RS test.I wanna learn by myself at first. However I think it's not a wise way learn by myself. So i took an online course. The question is: who is now preparing for Cisco tests too. What's ur unique skill to pass the tests?
Thanks anyway.

Im now preparing for my CCNP RS test.
At first i learnt by myself.
But i think it will take long for me to pass the exam.
I also attend an online course.
The course is good.
But still, i need more ways to improve myself.
Is there anyone else preparing for Cisco tests too?
Could u share some tips for me?