W11IntLect

W11IntLect - Fundamentals of Networking A network is a...

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1 Fundamentals of Networking A network is a group of two or more computers that intelligently share hardware or software devices with each other.
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2 Network Addressing Two types MAC address And IP address MAC address Devices on the network (specifically routers) use these to locate specific devices on the network and to create and update their routing tables . - These are a physical address, electronically recognizable by networking devices. - They are located right on the NIC. (also known as hardware address, MAC-layer address and physical address) - 6 bytes long (48 bits) expressed in hexadecimals - Used when connecting within the same network - Unique number burned in chip on NIC IP address Used to identify a computer over multiple networks when accessing the Internet - 4 bytes long expressed in 4 hexadecimal numbers - Used to connect across multiple networks - grouped in 3 classes. A, B and C - constitutes a network and a host number
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4 Expanding the Network Repeaters and Hubs Bridges Switches Routers Gateways Remote Access Connectivity Types Public Switched Telephone Network (PSTN) Integrated Services Digital Network (ISDN)
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5 Repeater Transmits data to all connected computers Hub Transmits data to all connected computers in a star topology Repeaters and Hubs Repeater Hub Cont’d….
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6 Repeaters and Hubs • Signal attenuation is the tendency for signals to deteriorate when they are sent over long distances. Repeaters are devices that are used to regenerate signals at fixed intervals. • The distance that a signal may travel before it requires regeneration depends upon the medium used and the technology implemented. (Eg. Fiber optic signals can travel the farthest distance by far) • Hubs are simply connection points at the centre of star-topology networks. •There is also a distinction between active and passive hubs. Active hubs perform the repeater function which means that they regenerate all of the signals that come to them before sending them onward.
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This note was uploaded on 04/14/2011 for the course HWD 101 taught by Professor Brain during the Spring '11 term at Seneca.

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W11IntLect - Fundamentals of Networking A network is a...

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