Contributor – Gaurav Arora

CCNA

CCNA means CISCO certified network associate .The exam is conducted in online mode. There are 50-60 questions in the exam .The time duration of exam is 90 minutes. The minimum marks required for exam is 84.9%. There are certain types of question asked in the examination.

ABOUT CCNA

Cisco system inc. is an organization that manufactures following type of devices:-

  • Gateway
  • Router
  • Switch
  • Hub
  • Wireless router
  • Cisco pix firewall etc.

BASICS OF LAN & WAN 

WHAT IS LAN ?

LAN is a combination of multiple nodes that define with in a limited area , use only one network address and use hub, bridge or switch for connection.

WHAT IS WAN ?

WAN is a combination of multiple LAN ‘s that define with in  different-2 Location’s, use multiple network address and use gateway, router and modem for connection.

HISTORY OF CISCO

In the early 1980s Len and Sandy bosack developed a device for inter – communication between two different networks , that device is known as Gateway .

In 1984, after successful implementation of gateway Len and Sandy starts an organization named as CISCO. In 1992 CISCO  changes its as “Cisco Systems “. After that Cisco system starts manufacturing of routers , switches and other devices.

CISCO Career Certifcation

Cisco has different types of certification tracks .

Routing and switching trackRouting & Switching

 As shown in this figure the routing and switching track is divided into three layers , the topmost layer is internet expert , the middle layer is of network professional and the lowest layer is of network associate .

Designing trackDesigning Track

As shown in the figure the designing track is divided into  three layers , the topmost layer is of experts , the middle layer consists of designing professional and the lowest layer is of network associate .

Security trackSecurity

As shown in the figure the security track consists of three layers . The topmost layer is of internet expert , the middle layer is of security professional and the lowest layer is of network associate security .

Service Provider trackService Provider

The service provider track also consists of three layers. The topmost layer is of internet expert, the middle one is of internet professional and the lowest layer is network associate.

Voice trackVoice Track

The voice track also consists of three layers, the topmost layer is of  internet expert, the middle layer is of voice professional and the lowest layer is of network associate voice.

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