:: Introduction to computer networks::
Physical Component-
A no. of Hardware component are required to built a computer network devices -
1) End Devices
2)Physical cables
3)Hub.-Broad casting
4)Switch - uni casting
1)End Devices - These are the user consoles using which a user access network services e.g desktop.laptops ,network printers ,network phones ,etc.
2)Physical cables - these are the guided mediums through which network data flows .The various categories of physical cables are .
i. Coaxial cables - This cable supports database up to 10 kbps. This is highly protected insulated cable in which data flows through central copper core.
ii. Twisted pair cable- these cables are further classified into two categories -
1.Shielded twisted pair and UN -shielded twisted pair. Twisted pair cables supports data rates ranging from 50 kbps to 10 Mbps.
2.These cables are used most frequently to build a network.
Optical Fiber - This cables works on the principle of total internal reflection. Optical fiber is the expensive cable which works on the principle of TIR (total internal reflection ). In optical fiber data is transferred using light rays . When light is being passed in the medium it represent a binary one being transmitted ,no light in the medium represents a binary zero .Optical fiber has a glass core usual made of silicon.Optical fiber has minimum signal decay.
3. Hub - is the basic hard ware component used to connect more than two terminals or end devices in a network . A hub when receives a packet broadcast it to all the attached terminals. Hub does no packet filtering & no conjection control.
4. Switch - is a advance version of hub .It is configurable hardware component which can be con figured using user user console. Switch maintain a mac table which contain information about all available ports and packet forwarding is based on the information provided by the mac table .Switch have its own processor and internal memory as compared to a hub ,switch has routing functions less delay and supports conjunction control technique.
5. Router- It is a hardware component used to connect more than two network and routing the signals .It is used for selecting more efficient path of transition. It maintains a routing table which is used for path sharing.
6.Bridge - Bridge is used for connecting the two isolated network of same network.
7.Repeater - Repeater is used to support & extend cable segment length.
Physical Component-
A no. of Hardware component are required to built a computer network devices -
1) End Devices
2)Physical cables
3)Hub.-Broad casting
4)Switch - uni casting
1)End Devices - These are the user consoles using which a user access network services e.g desktop.laptops ,network printers ,network phones ,etc.
2)Physical cables - these are the guided mediums through which network data flows .The various categories of physical cables are .
i. Coaxial cables - This cable supports database up to 10 kbps. This is highly protected insulated cable in which data flows through central copper core.
ii. Twisted pair cable- these cables are further classified into two categories -
1.Shielded twisted pair and UN -shielded twisted pair. Twisted pair cables supports data rates ranging from 50 kbps to 10 Mbps.
2.These cables are used most frequently to build a network.
Optical Fiber - This cables works on the principle of total internal reflection. Optical fiber is the expensive cable which works on the principle of TIR (total internal reflection ). In optical fiber data is transferred using light rays . When light is being passed in the medium it represent a binary one being transmitted ,no light in the medium represents a binary zero .Optical fiber has a glass core usual made of silicon.Optical fiber has minimum signal decay.
3. Hub - is the basic hard ware component used to connect more than two terminals or end devices in a network . A hub when receives a packet broadcast it to all the attached terminals. Hub does no packet filtering & no conjection control.
4. Switch - is a advance version of hub .It is configurable hardware component which can be con figured using user user console. Switch maintain a mac table which contain information about all available ports and packet forwarding is based on the information provided by the mac table .Switch have its own processor and internal memory as compared to a hub ,switch has routing functions less delay and supports conjunction control technique.
5. Router- It is a hardware component used to connect more than two network and routing the signals .It is used for selecting more efficient path of transition. It maintains a routing table which is used for path sharing.
6.Bridge - Bridge is used for connecting the two isolated network of same network.
7.Repeater - Repeater is used to support & extend cable segment length.
Posts
0 comments:
Post a Comment