Pros and Cons of Light Wave Transmission

Light Wave Transmission A modern application is to connect the LANs in two buildings via lasers mounted on their rooftops. So each building needs its own laser and its own photo detector. PROS Lasers are unidirectional with high bandwidth and low cost. It is also easy to install and does not require an FCC (Federal Communications Commission) license. The laser’s strength a very narrow beam is its weakness but 1mm wide beam at a target 1mm...

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Pros and Cons of Radio waves

Radio waves  PROS and ConsRadio waves are used every day in our lives, as they are used to broadcast everything that you hear on the radio and see on your television. They have the lowest frequency and the highest wavelength of the electromagnetic spectrum, and are the least potentially dangerous. There are no real health problems directly associated with radio waves. (Unless you blow your car up with the volume of your radio, but that has to do with sound waves and amplitude, and we don't have any control over what you set that to.) They...

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Pros and Cons of Message Switching

Message SwitchingADVANTAGES1. It provides efficient traffic management by assigning priorities to the messages to be switched.2. No physical connection is required between the source & destination as it is in circuit switching.3. It reduces the traffic congestion on network because of store & forward facility. Each node can store the message until communication channel becomes available.4. Channels are used effectively and network devices share the data channels.5. It supports the message length of unlimited size.DISADVANTAGES of Message...

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Pros and Cons of Packet Switching

Packet SwitchingADVANTAGES1. More efficient use of overall network bandwidth due to flexibility in routing the smaller packets over shared links.2. It allows multiplexing; different users, or different processes from the same user, can communicate at the same time.3. Cheaper to build as less equipment is needed.DISADVANTAGES OF PACKET SWITCHING1. Longer delays in receiving messages due to the time required to package and route packets2. Potential for network security risks due to the use of shared physical li...

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Pros and Cons of Circuit Switching

Circuit SwitchingADVANTAGESHighly reliableDISADVANTAGES Requires an initial channel set up that is usually time-consum...

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Unshielded Twisted Pair Cables Vs. Shielded Twisted Pair Cables

Shielded Twisted Pair CablesPros and ConsThe protective casing/shielding of STP cables works in connection with the other crosstalk-eliminating techniques implemented in Twisted Pair cables, giving it a performance edge over other types like UTP and coaxial cables.Properly installed STP cables are the most secure of all.However, the operation of STP cables is not that simple. First of all, they are bulky, as well as fragile. They need to be correctly installed and then regularly maintained, taking into account physical factors like their bending...

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Pros and Cons of Fiber Optic Cable

Fiber Optic CableAdvantages    It can handle much higher bandwidth than copper. Due to the low attenuation, repeaters are needed only about every 30 Km on fiber lines, versus about every 5 km for copper.    Fiber is not affected by power surges, electromagnetic interference, or power failures. Nor is it affected by corrosive chemicals in the air, making it ideal for factory environments where electrical interference is very high.    Fiber is lighter than copper. One thousand twisted pairs copper cables...

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Pros and Cons of Coaxial Cable

Coaxial CableAdvantages    It has better shield against electromagnetic interference than twisted pair cable, so it can span longer distance at higher data bits per second (bps).    It can be used for both analog and digital data transmissions. For analog data transmission, 75-ohm broadband coaxial is used and for digital transmission, 50 – ohm baseband cable is used.    It is inexpensive as compared to twisted pair wires and UTP cables but easy to handle.Trade-off between Coaxial Cable and Twisted-pair...

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Pros and Cons of Twisted Pair

Twisted PairAdvantages    Being the oldest method of data transmission, trained manpower to repair and service this media of communications are easily available.    In a telephone system, signals can travel several kilometers without amplification when twisted pair wires are used.    These media can be used for both analog and digital data transmission. The bandwidth depends on the thickness of the wire and the distance travelled, but several megabits per second can be achieved for a few kilometers in...

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Advantages And Disadvantages Of Tcp/ip and Osi Model

Advantages And Disadvantages Of Tcp/ip ModelAdvantages:    It can be used to establish/set up connection b/w different types of computers.    It operates/works independently of the operating system.    It support for a number of routing-protocols.    It enables the internetworking between the organizations.    It has a scalable, client-server architecture.Disadvantages:    It is complex to set up & manage.    IPX is faster than TCP/IP model.   ...

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The Physical Layer

The physical la...

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Introduction to Computer Networks

Introduction to computer networks Why we use computer networks? 1. Easily share documents 2. Share resources. 3. To communicate with other network users( Eg. E-mail, IM, video-conferencing ) . If my network is connected to the Internet, I can, 1. Shopping online 2. Use online banking 3. Access large scale of information. Business Applications of Networks   The client server model involves requests and replays. Some home network...

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