enothta 3-4
TRANSCRIPT
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http://www.google.com/url?q=http://www.entelia.gr/en/node/88&sa=U&ei=AwU5U8bOF8a_ygPJhoGoAg&ved=0CFAQ9QEwEQ&usg=AFQjCNHzLo2lSzf2Is0-fJYxxc3HimxjOwhttp://www.google.com/url?q=http://www.seile.gr/proionta-kalodia-seile.html&sa=U&ei=vAQ5U4OUJoTQygOcroHoCw&ved=0CDQQ9QEwAzgo&usg=AFQjCNH5kL-5Mh-q4DmUSC3AzZmrWQfqtwhttp://www.google.com/url?q=http://www.satspot.gr/technology/connections/255----utp&sa=U&ei=bgQ5U8rvE9P2yAOqwIHQDA&ved=0CFIQ9QEwEg&usg=AFQjCNEFE-HnxgsVxBH8Vafm6HDmfHU5UQ -
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(Twisted Pair)
(UTP)
(STP)
(Coaxial cable)
(Base band coaxial cable)
(Broad Band coaxial cable)
(Fiber optic)
(Single mode fiber optic)
(Multi mode fober optic)
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UTP & STP
UTP ( ):
. 5 .
STP ( ):
.
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(Coaxial cable)
1. UTP.
2. STP,
.
3.
.
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(fiber Optic)
1. .
2. ( 5 Gbps).
3. .
4. .
5. ( ) .
6. , .
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(radio waves)
1. . 1 m 100 Km. .
2.
, , .
3. , ,
( VHF
, (Very HighFrequency)
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(micro waves)
, , , .
,
.
, ,
.
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(satellite communication)
(satellites)
, ,
.
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4
1.
2.
3. 4.
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1.
.
, .
, , .
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2
,
.
,
,
,
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3
,
,
,
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4
.
,
. . .
, , .