We will discuss several aspects of networks in this lecture. First the communications channels, the transmission medium that the data is transferred over. The transmission medium consists of materials or techniques capable of carrying a signal. Then we will discuss transmission characteristics, which includes things like the transmission mode, transmission direction, and transmission rates. Then we will discuss transmission software, and finally
transmission devices any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device. The last thing we will cover is types of networks, such as LAN, and WAN. Show
TRANSMISSION MEDIUMSWe have two groups of mediums to cover, physical and wireless. Physical Transmission mediaThese are cables usually used in buildings, or underground. The three main types of physical transmission mediums I will cover are twisted pair lines, coaxial cable, and fiber-optic cable
Wireless Transmission MediaWireless transmission is becoming more and more popular these days. One of the leading protocols that is being used is called 802.11b. The sub and a few other buildings on campus are talking about putting in a wireless network using 802.11, this means that if you turn on your laptop in the sub and you have a 802.11 modem you will have Internet access without plugging in a cable. Here are some other wireless protocols:
TRANSMISSION CHARACTERISTICSCharacteristics include signal type, transmission mode, transmission direction, and transmission rate. Signal Type
Transmission ModesHow the bits are moved between devices
Transmission direction
Transmission rate
Common carriers that you can get from the phone companies
TRANSMISSION SOFTWARE
COMMUNICATION DEVICESThe hardware that allows or helps allow the transmitting of data, instructions, and information between a sending device and a receiving device.
Connecting Networks
Networks
Network Line control Ya gotta have rules!
Intranets
What is the medium used in wireless communication system?Wireless communication (or just wireless, when the context allows) is the transfer of information between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most common wireless technologies use radio waves.
What is transmission medium and its types?There are two types of transmission media, namely guided and unguided. Guided transmission media are cables like twisted pair cables, coaxial cables, and fiber optic cables. Unguided transmission media are wireless, such as infrared, radio waves, and microwaves.
What do we call a high speed high capacity transmission medium used to carry signals from different networks?Microwaves are radio waves that provide a high speed signal transmission.
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