The means through which data is transformed from one place to another is called transmission or communication media. There are two categories of transmission media used in computer communications.
1. BOUNDED MEDIA:
Bounded media are the physical links through which signals are confined to narrow path. These are also called guide media. Bounded media are made up o a external conductor (Usually Copper) bounded by jacket material. Bounded media are great for LABS because they offer high speed, good security and low cast. However, some time they cannot be used due distance communication. Three common types of bounded media are used of the data transmission. These are
COAXIAL CABLE:
Coaxial cable is very common & widely used commutation media. For example TV wire is usually coaxial.
Coaxial cable gets its name because it contains two conductors that are parallel to each other. The center conductor in the cable is usually copper. The copper can be either a solid wire or stranded martial.
Outside this central Conductor is a non-conductive material. It is usually white, plastic material used to separate the inner Conductor form the outer Conductor. The other Conductor is a fine mesh made from Copper. It is used to help shield the cable form EMI.
Outside the copper mesh is the final protective cover. (as shown in Fig)
The actual data travels through the center conductor in the cable. EMI interference is caught by outer copper mesh. There are different types of coaxial cable vary by gauge & impedance.
Gauge is the measure of the cable thickness. It is measured by the Radio grade measurement, or RG number. The high the RG number, the thinner the central conductor core, the lower the number the thicker the core.
Here the most common coaxial standards.
ADVANTAGES COAXIAL CABLE
The most popular network cabling is Twisted pair. It is light weight, easy to install, inexpensive and support many different types of network. It also supports the speed of 100 mps.Twisted pair cabling is made of pairs of solid or stranded copper twisted along each other. The twists are done to reduce vulnerably to EMI and cross talk. The number of pairs in the cable depends on the type. The copper core is usually 22-AWG or 24-AWG, as measured on the American wire gauge standard. There are two types of twisted pairs cabling
1. Unshielded twisted pair (UTP)
2. Shielded twisted pair (STP)
1. Unshielded twisted pair (UTP)
UTP is more common. It can be either voice grade or data grade depending on the condition. UTP cable normally has an impedance of 100 ohm. UTP cost less than STP and easily available due to its many use. There are five levels of data cabling
Category 1
These are used in telephone lines and low speed data cable.
Category 2
These cables can support up to 4 mps implementation.
Category 3
These cable supports up to 16 mps and are mostly used in 10 mps.
Category 4
These are used for large distance and high speed. It can support 20mps.
Category 5
This is the highest rating for UTP cable and can support up to 100mps.
UTP cables consist of 2 or 4 pairs of twisted cable. Cable with 2 pair use RJ-11 connector and 4 pair cable use RJ-45 connector.
Characteristics of UTP
Advantages of UTP
Disadvantages of UTP
2. Shielded twisted pair (STP)
It is similar to UTP but has a mesh shielding that's protects it from EMI which allows for higher transmission rate.
IBM has defined category for STP cable.
Type 1
STP features two pairs of 22-AWG
Type 2
This type include type 1 with 4 telephone pairs
Type 6
This type feature two pairs of standard shielded 26-AWG
Type 7
This type of STP consist of 1 pair of standard shielded 26-AWG
Type 9
This type consist of shielded 26-AWG wire
Characteristics of STPAdvantages of STP:
Disadvantages of STP:
Fiber optic cable uses electrical signals to transmit data. It uses light. In fiber optic cable light only moves in one direction for two way communication to take place a second connection must be made between the two devices. It is actually two stands of cable. Each stand is responsible for one direction of communication. A laser at one device sends pulse of light through this cable to other device. These pulses translated into "1's" and "0's" at the other end.
In the center of fiber cable is a glass stand or core. The light from the laser moves through this glass to the other device around the internal core is a reflective material known asCLADDING. No light escapes the glass core because of this reflective cladding.
Fiber optic cable has bandwidth more than 2 gbps (Gigabytes per Second)
Characteristics Of Fiber Optic Cable:
Advantages Of Fiber Optic Cable:
Disadvantages Fiber Optics:
what is the meaning --broadcast media
Mixed media.
Communication media is the venue in which one or multiple people use to communicate ideas or thoughts to others. Some of the types of communication media include: video conferences, viral campaigns, and newspapers.
The meaning of communication media is data or information that is sent using some source of media. These media types are often radio broadcasts, televisions airwaves, internet or telephones.
DVD-RW and CD-RW
Transmission media is a device which is used to transfer the data between one computer to another computer.There are two types of Transmission media: 1. Guided Media 2. Unguided Media
Transmission media is a device which is used to transfer the data between one computer to another computer.There are two types of Transmission media: 1. Guided Media 2. Unguided Media
2 types of culture media according to functional type
transmission media two types of wirless transmission media and logical transmission media it is used in computer networking devices because it very used in networking computer and bery eassy to configure it and manually configures.
With the aid of illustraton, discusss the transimission media
the transmission of messages from a sender to a large amount of people through various types of media, eg: newspapers, television etc. the medium has to have the ability to reach a large audience.
Question is too vague.Depends on the Hosting WAN's available transmission media that you are trying to connect to.transmission media (physical equipment/material) Common types are:Twisted-pair cableCoaxial cableFiber-optic cableWireless communications
according to consistency , according to function , according to constituents
Wired transmission media is media used to transfer information over a network, such as Twisted Pair cable. This is opposed to wireless transmission media which uses radio waves to transmit information. There are many types of wired transmission media such as coaxial cable, telephone lines, etc. Basically any form of wire used to transmit information over a network is considered a wired transmission media.
what are types advertising media
signal transmitted from transmitter to rfecevier is known as media transmission media divided in to two types guided unguided Transmission Media: All network nodes (computers and peripherals) are connected to each other and to the network by transmission media. A transmission medium establishes a communications channel between the nodes on a network and can take several forms: a. Networks can use existing wiring such as power lines b. Networks canuse additional cable to connect nodes c. Wireless networks use radio waves instead of wires or cable to connect nodes.
Electric current is a transmission medium which can be used to transfer data across a wire for example ( copper wires). Radio waves is a transmission medium which can be used to carry data through the air. The above mention mediums are known as data transmission media.