Network & Internet Working Devices
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Connecting devices Bridges Internetworking devices Routers Networking devices Gateways Connecting devices Repeaters 1 2 3 4
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In this presentation, we will discuss about the various connecting devices for networking. We will define the various terminologies like bridge, router, gateways, internet and ISP. To know more about Welingkar School’s Distance Learning Program and courses offered, visit: http://www.welingkaronline.org/distance-learning/online-mba.html
Transcript of Network & Internet Working Devices
Connecting devices
Bridges
Internetworkingdevices Routers
Networking devices
Gateways
Connecting devices
Repeaters1 2
3 4
Connection devices with the OSI model
3 layers 2 layers
Gateway Router Bridge Repeater
Physical data link,
Network LayersPhysical + Datalink
Physical layer
All 7 layers
7 la
yers
of
OSI
mod
el
1 Layer
A repeater in the OSI model
654321
654321
7 7O S I L A Y E R
S
O S I L A Y E R
S
Subnet R SubnetRepeater
Device A Device B
R
Repeater extends the physical length of a network
A repeater
RepeaterA
D C
B
Frame
Repeater Functions
Repeater
Regenerate Corrupted
Corrupted Signal
Corrupted SignalRegenerates
Regenerate Corrupted
Bridge to connect two LANs
HUB HUB
Bridge
LAN 1 LAN 2
A
B
CD
A
B
CD
A Bridge in the OSI model
654321
654321
7 7O S I L A Y E R
S
O S I L A Y E R
S
Subnet R Subnet
Device A Device B Repeater
Data linkPhysical
12
Functions of a Bridge
A B
C D
Bridge
Packet
Segment 1
Segment 2
Packet
Three types of bridges
I. Simple bridges
I. Learning bridges
I. Multiport bridges
Simple bridge - 1
• Primitive type• Least expensive• Links two segments• Contains a table that lists the addresses of
all the stations in each of them• Addresses are to be entered manually• Before functioning the operator must set
down & program the addresses of every station
Use of routers to connect LANs
Tokenring hub
Ethernethub
Server
ServerDevice 1
Device 2Device 5
Device 3
Bridge
Device 4
Device 6
A router in the OSI Model
654321
654321
7 7O S I L A Y E R
S
O S I L A Y E R
S
Network R NetworkDevice A Device
B
Repeater
Data linkPhysical
Network
Routers in an internet
Network E
Network A
Network B
Network C
Network D
RouterRouter
RouterRouter
Router
Router
Route for the packets from network A to network D
Network A
Network B Network C
Network D
Network Q
Use of gateways (connecting LANs and Mainframe)
Tokenring hubEthernet
hub
Server
ServerDevice 1
Device 2 Device 5
Device 3
Device 4
D i 6
Front-end
Mainframe
A Gateway in the OSI model
654321
654321
7 7O S I L A Y E R
S
O S I L A Y E R
S
Device A
DeviceBNetwork Gateway Network
654321
7
An inter net
R5
R4
R3R1
R2
R5
36 1 _53 1 _
18 1 _24 1 _
18 1 _10 1 _
08 1 _25 1 _
05 1 _24 1 _36 1 _ LAN5 LAN8
LAN10LAN18
LAN24
LAN36 LAN53 10 1 _08 1 _
Routing table
Updating the table
05 1 _24 1 _36 1 _
08 1 _05 1 _
08 2 R205 2 R2
05 1 _ 05 2 R208 2 R224 1 _36 1 _
05 1 _08 2 R224 1 _36 1 _+ one
hop
Received from R2 After adjustment
Combined R,’s new tabl
R,’s old table
Updating the table
18 2 R410 2 R4
08 1 _10 1 _10 2 R410 2 R4
08 1 _10 1 _
18 2 R4+ one hop
Received from R2 After adjustment
Combined R,’s new tabl
R,’s old table
18 1 _10 1 _
10 1 _08 1 _
Updated routing tables for R1, R5& R6
R5
R4
R3R1
R2
R5
05 2R108 3 R124 2R136 1_53 1_
18 1 _24 1 _
18 1 _10 1 _
08 1 _25 1 _
05 1 08 2 R2 24 1 _36 1 _ LAN5 LAN8
LAN10LAN18
LAN24
LAN36 LAN5308 1 _ 10 1_
18 2 R4
Routing table
Final routing tables
R5
R4
R3R1
R2
R5
05 2R108 3 R124 2R136 1_53 1_
18 1 _24 1 _
18 1 _10 1 _
08 1 _25 1 _
05 1 08 2 R2 24 1 _36 1 _ LAN5 LAN8
LAN10LAN18
LAN24
LAN36 LAN5308 1 _ 10 1_
18 2 R4
Routing table
Cost in link state routing
R5
R4
R3R1
R2
R5
36 1 _53 1 _
18 1 _24 1 _
18 1 _10 1 _
08 1 _25 1 _
05 1 _24 1 _36 1 _ LAN5 LAN8
LAN10LAN18
LAN24
LAN36 LAN53 10 1 _08 1 _
Routing table
The flooding of R2 ‘s LSP
R5
R4
R3R1
R2
R5
36 1 _53 1 _
18 1 _24 1 _
18 1 _10 1 _
08 1 _25 1 _
05 1 _24 1 _36 1 _ LAN5 LAN8
LAN10LAN18
LAN24
LAN36 LAN53 10 1 _08 1 _
Routing table
The flooding of R2 ‘s LSP
R5
R4
R3R1
R2
R5
36 1 _53 1 _
18 1 _24 1 _
18 1 _10 1 _
08 1 _25 1 _
05 1 _24 1 _36 1 _ LAN5 LAN8
LAN10LAN18
LAN24
LAN36 LAN53 10 1 _08 1 _
Routing table
Costs in the Dijkstra algorithm
R5
R4
R3R1
R2
R5
36 1 _53 1 _
18 1 _24 1 _
18 1 _10 1 _
08 1 _25 1 _
05 1 _24 1 _36 1 _ LAN5 LAN8
LAN10LAN18
LAN24
LAN36 LAN53 10 1 _08 1 _
Routing table
Networks 5, 36, 24 added
R1
LAN5
LAN36
LAN24Root
1
3
2
(ii) R2 added ; 5 permanent
R1
LAN5
LAN36
LAN24Root
1
3
2
R2
(iii) R2 permanent, 55 added
R1
LAN5
LAN36
LAN24Root
1
3
2
R2
3
LAN55
(iv) 24 permanent, R5 added
R1
LAN5
LAN36
LAN24Root
1
2
3
R2 3LAN55
R5
(v) R5 permanent, 18 added
R1
LAN5
LAN36
LAN24Root
1
2
3
R2 3LAN55
R5 LAN18
Dijkstra algorithm
R5
R4
R3R1
R2
R5
555
10LAN18
LAN24
LAN36 LAN53
2 3
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