Your Network Knowledge Has a Huge Gap
Basics of Networking:
Network:
• Interconnection of two or more devices is called as a network.
• The communication between two or more interconnected devices is called networking.
• Establishing connectivity between devices with the help of Hub/Switch/Access Point for Data Communication
Types of Networks:
• LAN-Local Area Network
• MAN-Metropolitan Area Network
• WAN-Wide Area Network
LAN:
• Local Area Networks are used to connect Interconnection of PCs and other Network devices that are very close together in a limited area such as a floor of a building, a building itself or with in a campus.
MAN:
• Metropolitan Area Network are used to connect networking devices that may span around the entire city.
WAN:
• Wide Area Networks which connects two or more LANs present at different geographical locations.
Internet:
• Internet is a massive network of networks,a networking infrastructure.
• It connects millions of computers together globally,forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet.
Network Topology:
• Bus Topology
• Ring Topology
• Star Topology
• Mesh Topology
Setting up a Network:
• Network Interface Card(NIC)
• Media (Cable)
• Wi-Fi
• Network Devices (router/switch/firewall)
Network Interface Card (NIC):
• NIC is the interface between the computer and the network
• It is also known as the Lan card or Ethernet card
• Ethernet cards have a unique 48bit address calledas MAC(Media Access control) address
MAC address is also called as Physical address or hardware address
The 48bit MAC address is represented as 12Hexa-decimal digits
Example:0016.D3FC.603F
• Network cards are available in different speeds
Ethernet(10Mbps)
FastEthernet(100Mbps)
GigabitEthernet(1000Mbps)
Media:
• The purpose of the media is to transport bits from one machine to another.
Types of Twisted Paircables:
Category DTR Purpose Connector
------- ------- ------------ ---------
CATS lO0Mbps FastEthernet RJ45
CATSe 500Mbps RJ45
CAT6 1000Mbps GigabitEthernet RJ45
Networking Devices:
• Switch
It is a hardware device that centralizes communications between wired devices connected with in a LAN
• Wireless Access Point
It is a hardware device that centralizes communications between wireless and wired devices with in a LAN
• Router
It is a device which enables communication between two or more different logical networks.
• Firewall
It is a device which protects the network from un-authorized access
It allows and denies the network traffic based upon policy configured.
LAN Cable types:
• Straight Through Cable
• Crossover Cable
• Rollover Cable
Straight Through Cable:
• Generally used for connecting two devices of different types
Crossover Cable:
• Generally used for connecting same type of devices.
Rollover Cable:
• Generally used for connecting Router console port to Computer COMport.
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Network Fundamentals Mastered: LANs, WANs, and Topologies
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