physical structure of computer network ? what is difference between point to point and multipoint connection ?

 physical structure of computer network : 

 physical structures in data communications :

 

What is the physical structure of computer network ? 
 What are  network attributes ?

 What are the types of connection in the network ? 
1___Type of Connection : 
A network is two or more devices connected through links. 
What is A link ?
 is a communications pathway that transfers data from one device to another.
-  For communication to occur :

• two devices must be connected in some way to the same link at the same time.
• There are two possible types of connections:

1_ point-to-point Connection 

2_ and multipoint Connection 

 what is difference between point to point and multipoint connection ?

What is a Point to Point Connection?

• A point-to-point connection provides a dedicated link between two devices.
• The entire capacity of the link is reserved for transmission between those two devices.
•  Most point-to-point connections use an actual length of wire or cable to connect the two ends, but other options, such as microwave or satellite links, are also possible .
• When we change television channels by infrared remote control,
•  we are establishing a point-to-point connection between the remote control and the television’s control system.

What is the difference between a LAN and a WAN ? What is Local Area Network (LAN) ?What is WAN?

What is a Multipoint Connection ? 

• A multipoint (also called multidrop) connection is one in which more than two specific devices share a single link .
• In a multipoint environment, the capacity of the channel is shared .
• either spatially or temporally.
• If several devices can use the link simultaneously,
• it is a spatially shared connection.
•  If users must take turns, it is a timeshared connection.

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