Cisco Certified Netwok Associates(CCNA)

CCNA:


Ccna stands for Cisco Certified Netwok Associates.
This crtification is provided by Cisco company because 80 to 90%
Network devices
are used on WAN that are manufactured by this company. These network devices provide more security on the network. Jupiter Company is on 2nd rank in world whose network devices are used on WAN.
Network devices are:
1)Switch
2)Routers
3)Hub

Now we can study ccna 6th edition. Its paper code is 640.802
You can do ccna in various categories:-
1) Ccna Routers
2) Ccna Switch
3) Ccna security
4) Ccna voil
5) Ccna wireless
Its time period is 50 to 60 days and exam which is taken by Cisco is 1000 marks and the passing marks is 825. it is on line exam.

You can do Ccnp after Ccna.Then your Ccna valid up to life time.nither it is valid up to only 3 years.


You can pass only 1 exam from any three exams these are:
1) Ccnp Routing
2) Ccnp switch
3) Ccnp composite
its fee is approximately $150

Now we started with Networking:-

Network: Any group which is properly communicates with each other.
The media which are use to communicate the groups are two types:-
1) Physical media
2) Logical media

LAN: LAN stands for local area network. In this we use logical addresses which is devided in to four parts,which is 32 bit in ipv4. In Ipv6 there are 128 bit address. In this 128bit first 40 bit reserve for Mac address and other 32 bit for ipv4 and last for user id. In this we sapret the bits using (:).

WAN:-WANs are used to connect LANs and other types of networks together, so that users and computers in one location can communicate with users and computers in other locations. Many WANs are built for one particular organization and are private.


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