What are the distances for the transmission mediums? (1 Viewer)

[Seraph]

What are the typical distances for the different types of transmission mediums?

e.g coaxial cable , fibre optic cables
i cant seem to find any notes that tell what the distances for these mediums are ,

i know this is pretty important as i have seen so many questions where they ask us stuff like this , recommend suitable transmission mediums, and they give you parituclar distances.....

 

[Freedom_Dragon]

Typical distance for the different types of transmission mediums

Coaxial:
Range 185m. Beyond 185m, it may require repeater.

UTP (Unshielded Twisted Pair):
Typically 100m. Beyond 100m, it may require repeater.

Fibre Optic Cable:
10s of kms. Beyond 2 km, it may require repeater.

 

[redslert]

in theory fibre optics don't need repeaters

 

[Seraph]

Typical distance for the different types of transmission mediums

Coaxial:
Range 185m. Beyond 185m, it may require repeater.

UTP (Unshielded Twisted Pair):
Typically 100m. Beyond 100m, it may require repeater.

Fibre Optic Cable:
10s of kms. Beyond 2 km, it may require repeater.

ahh thanks
so fibre optic cable : thats 10 km right ? (10s ? )

and also so all the wireless mediums pretty much have a huge distance right? i know satelitte would be beyond 200 km +, but what about microwaves and mobile phones..?

 

[Freedom_Dragon]

in theory fibre optics don't need repeaters

Indeed...but it would be good to have realistic knowledge rather than base everything on theory.

so fibre optic cable : thats 10 km right ? (10s ? )

Yer
Fibre Optic Cable:
10s of km. Eg:- 10km, 20km, 30km etc

Wireless Communcation

Infered: Less than a km.

Radiowaves: Hundreds of km.

Microwave: Thousands of km.

Hope that helps.

 

[sweeterv]

is it radio waves or microwaves which require line of sight transmission?

 

[redslert]

radio waves are the ones used for your mobile, radio....
yes they go through walls

microwaves?? i don't know

 

[Freedom_Dragon]

is it radio waves or microwaves which require line of sight transmission?

Its microwave that requires line of sight transmission. Tall towers are used for transmitting & receiving data in the line of sight, towers are placed approx 50km apart because of the curvature of the earth limiting the line of sight to 50km.

Furthermore satellite & satellite dishes are used for the transmitting & receiving data from one side of the world to the other in the line of sight.

 

[fatmuscle]

you should all just do CCNA

 

[redslert]

i wanted to do the cisco cert when i was 15/16years old in yr9!!
but at the same time that was when there were all the crashes in dot com industry so i didn't

 

[stoydgen]

i know this is pretty important as i have seen so many questions where they ask us stuff like this , recommend suitable transmission mediums, and they give you parituclar distances.....

Whenh they ask Q's like this, they arent really asking about the actual distances used, but rather which medium is more suitable in terms of their sheilding from interference (that sounds funny but yeh ). So fibre optic is used over long distances coz its extremely well sheilded, whereas if the distance is shorter, coaxial is used, coz even though it aint as resistant to interference, its cheaper and with the distances involved it wont be a problem. Twisted pair is only suitable for shorter applications where resistance shouldnt come into the equation at all.

Why do i say this? coz this is how i answered in my trial...to full marks

Cheers.

 

[Seraph]

6 A passenger in a car travelling in country New South Wales phones a friend in Sydney.
The diagram shows how the call could be transmitted through the telephone system.


What transmission media, in order from Segment 1 to Segment 4, would be most
appropriate?
(A) Microwave, microwave, optic fibre, twisted-pair cable
(B) Radio, microwave, optic fibre, twisted-pair cable
(C) Radio, radio, twisted-pair cable, coaxial cable
(D) Radio, microwave, twisted-pair cable, coaxial cable


i got a bit of beef with this. check out the diagram

Yes okay.. definetly radio and microwave for segmetns 1 and 2 ... but segments 3 and 4 ?

The answer is B , but why?
you would need a shitload of repeaters for 260km since fibre optics are only 10s of km

furthermore... 15km could be optics or coaxial i wouldve thought , since its distance is not as great

or is this an issue of speed?

 

[FcUk]

6 A passenger in a car travelling in country New South Wales phones a friend in Sydney.
The diagram shows how the call could be transmitted through the telephone system.


What transmission media, in order from Segment 1 to Segment 4, would be most
appropriate?
(A) Microwave, microwave, optic fibre, twisted-pair cable
(B) Radio, microwave, optic fibre, twisted-pair cable
(C) Radio, radio, twisted-pair cable, coaxial cable
(D) Radio, microwave, twisted-pair cable, coaxial cable


i got a bit of beef with this. check out the diagram

Yes okay.. definetly radio and microwave for segmetns 1 and 2 ... but segments 3 and 4 ?

The answer is B , but why?
you would need a shitload of repeaters for 260km since fibre optics are only 10s of km

furthermore... 15km could be optics or coaxial i wouldve thought , since its distance is not as great

or is this an issue of speed?

Read the post above you all cables need repeaters but fibre optic is best against interference etc...

 

[Seraph]

i realise that , but since they specifically gave distances... but now i see if they mean in terms of capabilities according to interferences , so be it .... thats how ill approach these then

ta

 

[jumb]

in theory fibre optics don't need repeaters

In theory, communism works.

 

[stoydgen]

The wise teenager rules again