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CCNA Routing and Switching Basic Concept


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CCNA Routing and Switching

CCNA (Cisco Certified Network Associate) is an information technology (IT) certification from Cisco. CCNA certification is an associate-level Cisco Career certification.

Cisco Routing and Switching

Switches Basics

Network switches are used to connect computers and servers into a single network. The switch performs the function of a controller and allows the devices within a network to communicate with each other. This action is performed through packet switching, where data is received, processed and forwarded to its destination from one computer to another. Information sharing, as well as resource allocation through switching, allows businesses to save money while improving productivity.

What is the Access Control List (ACL)

Switches operate at layer 2 of the OSI Model. A switch also referred to as a multi-port bridge, is able to determine where a packet should be sent by examining the MAC address within the data link header of the packet (the MAC address is the hardware address of a network adapter). A switch maintains a database of MAC addresses and what port they are connected to.

Routers Basics

Routers are used to connect entire networks to each other. Data packets are received, processed and forwarded from one network to another. Routing allows computers to link through the internet, thus allowing for information sharing between different networking systems.

Routers operate at layer 3 of the OSI Model. A router is able to determine where to send a packet using the Network ID within the Network layer header. It then uses the routing table to determine the route to the destination host.

In this video, you will learn about network media. Network types and connecting devices and many more about Network field.

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