Ccna

Communications and Services Certifications

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CCNA Exam
Exam Number - 640-801 Total Marks - 1000 Duration – 90 Mts Passing score – 849 Questions -45-55 Multiple Choice Simulations Drag and Drop
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Benefits
Peer Validation
 Personal  Potential Employer

Career advancement

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Cisco Icons and Symbols

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Data Networks
Sharing data through the use offloppy disks is not an efficient or cost-effective manner. Businesses needed a solution that would successfully address the following three problems: • How to avoid duplication of equipment and resources • How to communicate efficiently • How to set up and manage a network Businesses realized that networking technology increase productivity while saving money. could

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Networking DevicesEquipment that connects directly to a network segment is referred to as a device. These devices are broken up into two classifications.  End-user devices  Network devices End-user devices include computers, printers, scanners, and other devices that provide services directly to the user. Network devices include all the devices that connect the enduser devices together to allow them to communicate.
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A network interface card (NIC) is a printed circuit board that provides network communication capabilities to and from a personal computer. Also called a LAN adapter.

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Hub
Connects a group of Hosts

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Switch

Switches add more intelligence to data transfer management.

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Router
Routers are used to connect networks together Route packets ofdata from one network to another Cisco became the de facto standard of routers because of their highquality router products Routers, by default, break up a broadcast domain

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Network Topologies
Network topology defines the structure of the network. One part of the topology definition is the physical topology, which is the actual layout of the wire or media. The other part is the logicaltopology,which defines how the media is accessed by the hosts for sending data.

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Bus Topology
A bus topology uses a single backbone cable that is terminated at both ends. All the hosts connect directly to this backbone.

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Ring Topology
A ring topology connects one host to the next and the last host to the first. This creates a physical ring of cable.

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Star TopologyA star topology connects all cables to a central point of concentration.

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Extended Star Topology
An extended star topology links individual stars together by connecting the hubs and/or switches.This topology can extend the scope and coverage of the network.

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Mesh Topology
A mesh topology is implemented to provide as much protection as possible from interruption of service.Each host has its own connections to all other hosts.  Although the Internet has multiple paths to any one location, it does not adopt the full mesh topology.

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Physical and Logical Topology

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LANs, MANs, & WANs
One early solution was the creation of local-area network (LAN) standards which provided an open set of guidelines for creating network hardware and software, makingequipment from different companies compatible. What was needed was a way for information to move efficiently and quickly, not only within a company, but also from one business to another. The solution was the creation of metropolitan-area networks (MANs) and wide-area networks (WANs).
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LANs

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WANs

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Virtual Private Network
A VPN is a private network that is constructed within apublic network infrastructure such as the global Internet. Using VPN, a telecommuter can access the network of the company headquarters through the Internet by building a secure tunnel between the telecommuter’s PC and a VPN router in the headquarters.

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Bandwidth

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Measuring Bandwidth

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Internetworking Devices

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What Are The Components Of A Network ?
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