Scanned by CamScanner

advertisement
Scanned by CamScanner
- Î.*tr¡nlt Se-v¿i.t ?ø,t;Js¡
- Ñr,+z^ro,L r"f,rlfrc. C*nd(Ñ¿h¡o& G*J">
- i*brri 0r3 .^Ç-fir',r þ 9¡.$*ll
ISP
Ntc
.
\l'"\&
!O'
ba¡\
CODEC
repE_u
0P^ Ç1rt nn,r I"rtø,'cor*r"-c{fun (Ñta*L r o{e( {'t
Le"ot)
Colt,1: J"ßrJ6\ (W""!': Co''trtccriha in
Þ'o;'Jdzr (c"ri,-tJ'{a r'tJ +
r.r1
.1r'o\
IP
(
r1
¿-( (n*
JO¿u*as8
Ethe rnet
ñl¿t¡orb t¿¿hro
(o
LAN
,
Þ vv
DSL
y.a.1
)
Wtlla)
1. -f"dcr*t)
WAN
DN
1,nryš.
1*4
. r¡^{
\ec
ùo¡
,f*'
Tvunç -çç;^ Co.Á"tt ?ø-locø(
I.d¿r*l ?r"f"'P I
fi ( r\
ott\
ht
]rc t"
1l""
tp"'t't'
* t'¿^¡^-:rça" *'l^¡)
g"ffirr;lff:
&Croç'
HTTP
TCP
*[ft
M&tn-
Rorto r- -f6rr^rcrúr,
øy,i i4 P'r1)
!^tø¿r,*.0( 9;enios ?ßil N¿"'¿
*Lço;þ+- !i^s
Þi,*ú
*{
http://www.sharp-world.com/products/copier/mx_7000n_6200n_5500n/printing.html
-r-.-',o*
¡Jcf'¡o"V
EthernÊt
{108¡æ
ï/l
ûûB¿s*
TXJ
Windo,rr¡gü
Macintosh
{
II
Ç
.+-
Print
Sæ
-'*-! --r
: ¿l
Windo,¡¡r !er,ærü
+3
hJta
qÐ
g
/,,
\
D
frr^tYl
r)
-<)
o
o
I
a
I
o
-
-
I
,
I
I
\
çel
o
Ét
/t
t¡
I
(
,0"Ñ
$$'
/
l¡
J
s
I'ols
ço
,oFl-"1
r?at !$tl ü
http://www.broadbandinternet.net.au/
Cable Transmission Media
A
TwÍsted-paircable
€
Most common lJlN cables loola similar to ælephone
llncs
€ Conslsc of pairs of twisted copper wires - they arc
¡¡isted
so
tùatit protects
the wlre from electromagnedc
E
interference
ild(
q
tJ¿
over longcr dlstance
€
A
Tra¡sftr raæ up to 10 Mbps
Ftber-opdcable
€ Bundles of halr.thln stands of glass üat uses llght
bcans to trensmit stgn¡ls
€ Havc åsterspeed than oa¡dal and nrlstcd.palr
€
Ttansñr rac now approach 100Gbps
4
Wireless Transmission Media
t
lnfrared Ray (lR)
'/ô Slgnals carried in tnftared llglt waves
€ Musttrançmitin sudghtilne wlth no obsuucdons
€
€
Fl
Transmission dlstancc up to 30 meters
TransÞrrate uP to,lMbPs
Radio Frequency
/ô Slgnds carried ln elcc'lromagneüc
Jt Also ravels in straight llncs
ß.e I
waves
J0 Bluetooth
Ó Tnn¡¡nl¡slon dlstrncê up to 10 met€rr
ú Transfcr r¡tô up !o 2Mbpc
r lt
4 Cellularphoneradlo
&
Tr¡nsml¡slon dlst.ncc up to 56 kllomet
up to lsMbpû (1C)
$
ns
Ó Traßfcr r.tc
"0 w¡Pi
ó
Tnn¡ml¡¡lon dBbncc up to 180 met¡F outdoor
(rndoor rrngê could bc lecr th¡n 50 mcært)
úTr¡¡ufer¡¡euporogu'
fêln w¡ng / csl 102 - l,,cp8
\ \--
9
o
Wireless Transmission Media
A
MicroWaves
J0 Slgnds carried ln hlgb fr'equencY
T
electromagnet¡cwaves
4 Also travels in sntghtllnes
€ As the earth is rcund,we need manY
å
mlcrowat e sudons to rclay data over a long
dlstance
ó
4
The ea¡dr.b¡sed reiectlvc dlshes ¡¡e-bullt
cvG¡Y 30 m'es (¡r8
lmå:T'"*o
o
rt
¡-fi
$t
\
Å,.
Å
Communlcadonsatclllt¿
ó
dut necelvca mlcnowtve rlgnals
from oartlr'bscd st¡don, ¡mpllnes tlro slSn¡ls,
end brþdcast ücm bæk to oth?r st¡dons
Sprce stsdon
it
dlffercntlocaËons
fcrn Wbng / GSl102 - l¡co8
"-qffi
gJcø¡ç.MF,ol
*
10
5
Transfer Rates
W
rrr-fflft-rtrflltr!
C.òL
. 100üôf ltttEmcd
. lc08or.,f (¡rÍ lùeíìct)
. 100085GT (6ig!btr €rtúü)
*'å"o\qtu'
.
.
ffi
l0 Môpt
fir[niÌ!
100
il¡pt
| 6!p¡
4l,tprro t6ifr9o
lo0.rel (tì¡ntt*. tüEnd)
r0Mb
100ü.5 (DJûrUra ltionü)
r0
,¡hprkC.bt
. l0g¡r..¡ (€û.ñet)
. t008ðètx (toí Er'll',u)
.
ffim
t00t Gtôar olírtbutad D¡r¡
htwl¡(a, tot î rÍ|0
.6i$bn €ôoñtl
.
106lg¡0¡r tthcnet
.
¡G6¡9.ù[
. looctgrü
tüüi.t
trhernct
"',ïï1""
mm
NFTI
Irltrtd
l¡o¡dcrt
n{o
t öpt
r Gbgt
l0 Gbø
o
802,Ib
o
Cdld¡r;¡dlo
r00 Mbpr
100
gluaoodt
I
:stii; lùT
802.ttn iU
Mht
t0 M¡ot
ils
.
. l,ll8
o26
.3G
.
¡16
l,¡C'omu. r.do
Ccñn¡úc¡do.l3
rar.ftt
I
f,,
rô96 to 4 Mö96
lôgrþ2tôoj
l.c
l¡¡r o ro i|¡o¡
r trùgt
54 Mùpi
I
54 Mbr
r00 r¡ùp6
I l0 Mòpr ro {80 Mb96
9.6lGtr
t¡¡ f¡p¡
þ
ßal¡t¡t^*
t9.2 toot
ro 2.t u¡à¡
lo 15 trrôCt
150 lrö9t
Up
î,@t"(
I Cô9t
¡0 cbpl
r00 G0r,
lGln W¡Dg/ CSIIOZ - r¡cOS
tt
'
Tro^rlou
ca*a¿
S+r^Jo'r¿I rd,oplwvu-
L-*
s6
(o¡d-_"{" t^r.rr/f:iùÐ
,J tf
f.^rlfe{-gair
"¿
Cpax,-a.!-
Fib<-'
loo
e^bt*
uLlL
K
tp'
(au
Mbgs
€(o*dar/- 4e(cyho'o
r9
å;¿
I\ gts+'ffv#ír""- )
Ð
XJ¿ È€r
:
- I C-L7s
lo M 6pç
/c'o &L7s ! I
- Of.t
,"p Mode"a
ku :
+ Mbps (3o n'fu'¿ 4,
ISDN l,2tl'rs
D9L
R"rlæ Fr"çr^" n
3 , bYt (tomolo-s4
CrIl"'.(", Ptã,tt Pt!;h > ts î-t b?t LW
on
(o8 /'( sf s Ctgat"'*fe¡
d4t
?.1zr 27121
, ,. tr'lbf¡
U
BI''e- T""14-
f'4ì.-
Na'v€5
t5 o
. Stafrtns
.e'/øY Jo
'
t SeeJU?'"
lr'1*
C" C +8
)
04b¡zs
Kn)
I
ebP s
if-<
Start => search "Computer name" => select "Rename this
compute/'
E
Сtcm Propertirs
Computer Name
Adva¡ced
Haldvuarc
Sy$ern Protection
Benu*e
Start => search "network connections" => select "view network connections"
E
Netror* Connection Details
E #
Network Connection letails:
I-t
\,úindows uses the following infomation to identiþ your computer
on tha nctwoft.
Property
Eomputer
glescdption:
Description
Value
Eonnection-specific DN..
lntelfHJB2ST9LM 6
I
Hffi
PhysicalAddress
Fol exemple: "Kitchen Compute/'or "Märy's
Compute/'.
Full computar nama:
Dom¡in:
CS03Ê1 04.¡d.cityu.adu.hk
ad.ciþu.adu.hk
To use a wizard to ioin a domain or woftgroup. click
Netwoù lD.
DHEP Ensbled
No
lPv4 Address
144.214.36.104
lPv4 Subnet Mask
255.255.0.0
lPv4 Defcult Gateway
144.214.3Ê.254
lPv4 DNS Servers
144.214.121.221
Nctwo¡k lD..
r:*u(S
144.214.5.20
144.214.5.27
lPv4i'VINS Setver
To raname this computel ol change its domain or
workgoup, click Change.
ehange..
NetBl0S over ïcpip
{
OK
Cancel
åppþ
En...
Yes
til
Elose
DHCP - a protocol to dynamically assign lP addresses
+b
Computer Networks
E
E
Network - collection of computers or devices
connected via communication devices and
ransmission media
Common t¡ryes of nenøorls
ß uN
flocal area network)
úNetworkln llmited geographlcal
area such as home
or
oñce building(s) where conrputers/devlces are rclatively
near eacl¡ other and can be physlcally connectcd using
cables or wlreless mcdla
ó8.9., homc network
CS
departrnentnetworkin Cltyu
fr WAN (wide area network)
ó
Network tl¡at covers
a
wide geographic area
úUses longdlstance transmission med¡a to llnk computcn
separated by a few or thousands of mlles
ó lnte¡¡et ls the world's latsest
""",ffi'or,s*ö
19
-¡tñ
h
ttp //wh ati s tech ta rg et. co m/d efi n iti o n/n etwo rk-to
:
.
p o Io g
y
The physicaltopology of a network is the actual geometric layout of workstations. There are
several common physicaltopologies, Ërs described below and as shown in the illustratïon.
Star
Bus
Mesh
Ring
http://whatis.techt
arget. com/definitio
n/networktopology
Tree
*l,o
http://www.info.gov.hk/gia/general/201312/04/P201312040364.htm
Lec08 Computer Network
\},.ct
OSI Network Model:
f.t'
\t"o
Appticat¡o;9t? ,
Layer 6)
presentatio,Pî\T s'
Layer 5)
Session i
Layer 3) Network
$
¿É
Layer 7)
Layer 4) Transport
Layer 2) Data
I
\
I
f
p $ebb.øurw)
t
t,
filce Dfu , [^{a
p^'te
w8
cP
s4.,
;ì^tÞ þ¿k¿Jt
s*-w
În.9t fP f Allaçs ¡achøtt
(tlft
Link ryt É{tur,.¿f lech''["¿a
Layer 1) Physical
bt'lt Co¡nn¡,;..f.ìn Ct*".ril (
'Hffi^^
C^¡L
o4
ê-.
^{t'}'e')
,,î,\c.* "
Vo
rl
,tt
COMMUNICATIONS SOFTWARE:
Using a Web browser program, you request a Web page on a Web
server be displayed on your computer screen.
TCP/IP:
Your computer uses the TCP/IP standard to establish a connection with
the Web server that stores the requested Web page, divide the web
page into packets, provide an address for each packet, and reassemble
the Web page once it arrives at your computer. Routers send the
packets over the Internet from the Web server to your computer.
ETHERNET:
The Ethernet standard controls how devices (adapter cards, routers,
modems, etc.) share access to the media (cables and lines) and
how devices transmit data over the communications channel.
Download