Computer networks

Replies

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  shreyasm89

  What is a wwitch?Did you mean witch?
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  anandkumarjha

  sorry brother....it's switch.....i wrongly written it as wwitch...but now currected after editing
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  shreyasm89

  An IP address is a 32-bit number allocated to a network location.There are 4 classes of IP addresses-Class A,Class B,Class C, Class D.Actually we have even Class E but that is for future expansion & is not currently used on IP networks. Any IP address is divided into two parts-Network ID & Host ID. The network ID decides the level of sub-networks you can have according to a particular class.More the no. of bits in a network ID more is the no. of computers you can have on a higher level. For branching out multiple connections from a host we need a switch.But since the data packets have an IP header in which the IP address of the destination host is stored it has to be routed to the proper switch.Since this switch is occupying a node in the network it has to be assigned an IP address.
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  jessiehilty

  A computer network often simply referred to as a network, is a group of computer and devices interconnected by communications channels that facilitate communications among users and allows users to share resources. Networks may be classified according to a wide variety of characteristics. Thanks for sharing...
  
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  durga ch

  switch is a layer 2 network device.
  A port on a switch is where you can connect your device
  
  what do you want to know exactly?
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  anandkumarjha

  durga

  switch is a layer 2 network device.
  A port on a switch is where you can connect your device
  
  what do you want to know exactly?

  I exactly wanted to know the uses of switches and port number in networking...
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  durga ch

  are you familiar with hubs? Hubs sebd the data onto all the ports except on the port it recieves, but switches are a little more intelligent. When I say Layer 2 network elements, it can be deduced that we are talking about mac IDS of computer. So consider your LAN, and you ahve a switch with 4 ports , you recieve a packet destined to a computer on port 4, switch looks up its internal tables to deduce where the mac address of the computer 4 is located , and forwards it according.We dont call it routing as routing is generally done at L3.
  Ports are where the devices connected to, another advantage of using ports is creation of virtual LANs