CCNA introduction(first class)

CCNA(Routing and Switching)

CCNA Routing and Switching is a certification program for entry level network engineer that helps maximize your investment in foundational networking knowledge and increase the value of your employer`s network. CCNA Routing and Switching is for Network specialist, Network Administrator and Network Support Engineer with 1-3 years of experience. CCNA Routing and Switching validates the ability to install, configure, operate and troubleshoot medium- size routed and switched networks.

Benefits

-          Peer Validation(understand where you stand in the industry)

1.       Personal (For knowledge gain)

2.       Potential Employer

-          Career advancement(CCNA,CCNP,CCIE you can progress your career in company)

Some of the Cisco icons and symbols used are shown below:

Networking fundamentals

• ·        Network: Group of devices connected together to share resources and information
• ·        Internetwork: Connection of different devices at different locations
• ·        Internet: Network of network
• ·        Intranet: Privately owned network

Components of network

1.   End devices(PC, mobile,server, other handheld devices)
2.  Intermediate devices(Routers, Switches, Hub/ Repeaters(they are obsolete and are replaced by modern switches))   Repeaters are used to extend the range of LAN. Limitation of power on cable flow with certain distances so repeater are used.Hub is a multiport repeater used to add more connection to the LAN. Both of these works at the first layer of OSI model as they generate electrical signals only. Typically they are unintelligent and unmanaged device.
3.   Software
4.   Physical Media and connectors