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1 what is the difference between half-duplex and full-duplex transmission modes2 name the four basic network topologies
1 identify the five components of a data communications system2 what are the three criteria necessary for an effective
1 in what ways is network design an iterative process why does the need for network documentation arise in many phases
1 assume that the number of hosts connected to the internet at year 2010 is five hundred million if the number of hosts
1 when we say that the transport layer multiplexes and demultiplexes applicationlayer messages do we mean that a
1 when a party makes a local telephone call to another party is this a point-to point or multipoint connection explain
1 in an internet we change the lan technology to a new one which layers in the tcpip protocol suite need to be changed2
1 what is the relationship between period and frequency2 what does the amplitude of a signal measure what does the
1 name three types of transmission impairment2 distinguish between baseband transmission and broadband transmission3
1 why do optical signals used in fiber optic cables have a very short wave length2 can we say whether a signal is
what is the total delay latency for a frame of size 5 million bits that is being sent on a link with 10 routers each
1 a file contains 2 million bytes how long does it take to download this file using a 56-kbps channel 1-mbps channel2 a
1 what is the bandwidth of a signal that can be decomposed into five sine waves with frequencies at 0 20 50 100 and 200
1 we send a voice signal from a microphone to a recorder is this baseband or broadband transmission2 we send a digital
what is the phase shift for the followinga a sine wave with the maximum amplitude at time zerob a sine wave with
1 which signal has a wider bandwidth a sine wave with a frequency of 100 hzvb or a sine wave with a frequency of 200
a device is sending out data at the rate of 1000 bpsa how long does it take to send out 10 bitsb how long does it take
1 a periodic composite signal contains frequencies from 10 to 30 khz each with an amplitude of 10 v draw the frequency
1 a signal has passed through three cascaded amplifiers each with a 4 db gain what is the total gain how much is the
1 a signal has a wavelength of 1 mum in air how far can the front of the wave travel during 1000 periods2 a line has a
1 we need to upgrade a channel to a higher bandwidth answer the following questionsa how is the rate improved if we
1 list three techniques of digital-to-digital conversion2 distinguish between a signal element and a data element3
1 define a dc component and its effect on digital transmission2 define the characteristics of a self-synchronizing
1 define scrambling and give its purpose2 compare and contrast pcm and dm3 what are the differences between parallel