Wired vs. Wireless Networks

0:01 [Music]

0:07 welcome back

0:08 in this video i want to take a very

0:10 short look

0:11 at the difference between wired and

0:13 wireless

0:15 networks because a lot of times we just

0:18 kind of go with what we have

0:20 and we don't really think about it from

0:22 a feature standpoint

0:24 but today's going to come when you have

0:25 to make a decision do i need to do wired

0:27 wireless or both

0:29 and it's just a good idea to pay some

0:31 attention to this

0:32 even though it's not a really big

0:34 concept and it's certainly not hard to

0:36 understand a lot of it's very much

0:39 common sense

0:40 but if you've never done it never

0:41 thought about it it's really a good

0:43 discussion to have

0:44 so here we go we're going to talk about

0:47 a bunch of different

0:48 aspects and we're just going to talk

0:50 about the differences

0:51 okay we're just going to lay it out and

0:53 i'm going to put a little plus sign on

0:55 the screen

0:56 by which one is better when you consider

1:00 things in general about that type of

1:02 networking so this will be really really

1:04 simple when we talk about

1:05 speed i've actually had students tell me

1:08 that they think wireless is faster

1:10 so let's see if they're right they are

1:12 not wired

1:14 is wire speed is faster than wireless

1:18 it just is okay when you go through a

1:21 wire

1:21 the transmission rate of those bits is a

1:24 lot faster

1:25 than when you have to go through the air

1:27 why you could have noise

1:29 you could have signal weakness a wire

1:32 is a wire if it's connected it's moving

1:34 okay

1:37 digital transmission

1:40 of ones and zeros can actually be set up

1:43 like in the hdmi

1:45 protocol to where it even knows it got

1:48 all the bits

1:49 so that you have no transmission loss

1:51 okay

1:52 wire speed if you're on a wired network

1:55 and by wired i also mean fiber

1:58 okay it's just faster okay that's all it

2:00 is it's just faster

2:01 bandwidth because it's faster you can

2:04 get more bandwidth

2:05 through a wired network okay att brings

2:08 a fiber cable up

2:10 comcast brings a coax cable up to your

2:12 house

2:13 okay whether you're or a business okay

2:15 t1s

2:16 are wired or fiber okay

2:20 so bandwidth you get more bandwidth on a

2:22 wired network that's just the way it is

2:24 of course a wired network is not real

2:26 mobile and we'll get to that

2:29 installation cost wireless wins here

2:32 because you literally turn it on find

2:34 the network or plug it in

2:36 you've got a router or a switch that's

2:38 working wireless you connect to it

2:40 right i mean you make sure it's

2:42 handshaking turned on right the right

2:43 passcode

2:44 to the mac id and the default thing they

2:47 give you and you're off to the races

2:49 okay so wireless is less expensive

2:53 to buy the cabling or the fiber

2:56 and to get all of that put in the house

2:58 and the conduit and things like that

3:00 it costs more to have a wired network

3:02 but companies are going to pay for that

3:04 because of the bandwidth and speed

3:06 okay cost well wireless is obviously

3:10 cheaper we just talked about that

3:12 because there's less insulation so

3:15 there's less cost

3:16 okay it's just cheaper all right

3:19 mobility guess what

3:20 wireless always wins on mobility right

3:25 you can't make a cord long enough that

3:26 you can take your cell phone

3:28 to the store with you and still be

3:30 talking the whole way to the store

3:32 right that's a hands down winner for

3:33 mobility so if you're on the go

3:37 you're not even close to thinking about

3:38 a wired network okay

3:41 now coverage and range wireless wins

3:44 again

3:45 because there are certain lengths that

3:47 you can go with a network cable

3:48 and then you have to put in another

3:50 repeater or a booster

3:52 to keep going okay wireless you can have

3:55 a series of cell towers for example and

3:58 you can just drive across the country

4:00 yakking on the phone

4:01 okay so coverage and range i give that

4:04 one to wireless as well

4:06 okay now interference we're back here on

4:09 the wired is the winner

4:11 okay because it's a lot easier to have

4:14 wireless radio interference and noise

4:18 that downgrades the signal okay and

4:21 makes it harder

4:22 to get those ones and zeros through the

4:24 air to the destination receiver

4:27 so there's a lot less interference with

4:30 wired especially i mean

4:31 you can do shielded cabling okay there's

4:34 a focus cable that runs from the

4:36 mainland to the island that was my

4:38 command

4:38 and it's over 70 miles of undersea cable

4:42 and we got high speed fiber in

4:44 milliseconds

4:45 okay interference there was none

4:49 it was beautiful okay so you can have

4:52 a lot of cable and not a lot of

4:55 interference

4:56 you can have interference on a wire but

4:58 if it's shielded properly

5:00 it's not going to be a factor okay so

5:03 cabling certainly

5:04 wins the interference battle and

5:06 reliability

5:07 has to go to wired now wireless is

5:10 getting pretty darn good

5:13 okay but when you're talking about a

5:15 system that you know

5:17 it needs to be there and connect as a

5:19 network

5:20 partly due to the speed and the

5:22 bandwidth the reliability

5:24 of a wired network is always going to be

5:26 better

5:27 our school computers for example are

5:29 wired

5:30 through switches to the campus area

5:32 network of our high school

5:34 which is then connected across the metro

5:36 area network to our county school system

5:39 and wherever it's wired it's reliable

5:42 our wi-fi goes down

5:44 frequently when we have testing going on

5:46 with a bunch of kids with one-to-one

5:47 devices

5:48 okay so the reliability i can tell you

5:51 if you've ever lived in a high school

5:53 the reliability of the wire network is

5:55 always better than the wireless

5:57 okay that's a really easy example to

5:59 pull

6:00 okay so that's kind of where we're at so

6:03 when you're building your home network

6:05 you got to think about this all right or

6:07 a small business

6:08 right because anymore half our small

6:10 businesses are in our basements now

6:12 okay so i took my router

6:15 from the cable company and i put drops

6:19 in my wall of rj45

6:21 and ran the wires overhead or through

6:23 the walls whatever i needed to do

6:25 so that i could plug in in a number of

6:27 rooms

6:29 my hardware so that it would be faster

6:30 more reliable etc

6:32 if i'm sitting down here i also have my

6:35 tablets i have this thing

6:36 connected wirelessly to the network

6:39 because it's fast enough i don't have

6:40 that many computers in here

6:42 although i have a lot but the bottom

6:44 line you get my point right

6:46 so you may need a combination of these

6:49 to serve whatever it is you need i

6:52 guarantee you if you're going to do some

6:53 programming

6:54 you're going to be working on wired

6:55 systems a lot

6:57 again wireless is getting really good so

7:01 there are a lot more and more examples

7:03 of people just going wireless

7:04 for the cost and the simplicity and it

7:07 works well enough for what they need to

7:08 do

7:09 okay but these are kind of the raw

7:11 differences if you will

7:12 so in the next one we're going to begin

7:15 to talk about

7:16 serial technologies and again i'm not

7:19 going to go too deep in each of these

7:20 because there's a number of them

7:22 but i want to go through them and have

7:23 you get familiar with what's out there

7:26 and what you're going to come in contact

7:27 with

7:28 and then as we begin to use some of

7:30 these you'll understand kind of where

7:31 they came from

7:32 okay so i'll see you on the other side