JML Institute Online
LOCAL AREA NETWORKS:  JML.Lec14
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(Main sections:  This is the study material for your first Quiz on this section.)
		
1.  Network Topologies:  Ethernet - Token Ring - etc. 
		
2.  LAN hardware devices & wiring, Maus, Hubs
		
3.  Protocols & communication. DSL etc.
		
4.  jmlDVD#4:  Bridges, Cisco Routers, Gateways, & T1-Multiplexors.
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NETWORK TOPOLOGIES: 
Client workstations are connected to their server are various topologies, the simplest of which is the ethernet in series or bus connection.  
		
Ethernet:  
The NIC (network interface cards) listen to the line to detect collisions to determine ...
		
Token Ring: 
Each client is connected to the next in a circle, with the server being the alpha and omega of the circle, or the beginning and the end.  Passes a token around to determine which client or server needs to send or receive packets of data.
		
Star: 
Each client is connected to the server directly.

LAN HARDWARE:  
A LAN consist of a server and some client PCs which are connected with hardware and software.  
		
Twisted pair: 
Two wires are simply twisted to have a cancelling effect on the noise and interference caused by spurious electric fields.  Twisted pair and coaxial cable are used in several sizes to optimize the power and distance to the server requirements in a network.
		
Coaxial cable:  
One wire is meshed around a center core wire, separated by insulation and covered on the outside with insulation.
		
Terminals:  inc.
		
10 base T:  inc.

TOPOLOGY	CABLE	COMPANY	PROTOCOL	UNIT  CARD
star			10base5				f/o hub..
bus			10base				repeaters			802.3
arcnet											802.4
Starlan		10baseT 				(bus)	

LAN SOFTWARE:  
A LAN consist of a server and some client PCs which are connected with hardware and software.  In all cases there is some type of LAN manager software that communicates with some brand of client software.  The client software communicates through the NIC and cabling to the server's NOS.  The NOS obeys the client request for downloads of application software stored on the server.  The application software is only temporarily stored on the client PC, saving mucho money for the company. The Server however will restrict access to software to users based on their status.

REPEATERS: 
Repeaters reproduces weakening signals and send data onto other sometimes distant destinations.	

MAUS: 
Wiring closets that provide a connection center for client PCs. 

HUBS: 
Spa

FANOUT BOXES: 
Spa 

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assignment :
Search the internet for new networking protocols and write a 2 page summary of  your selection. 

EMAIL:  attach your assignment to your email. 
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fig A: