1. NETWORKING LET’S NETWORK
Internetworking Concepts Overview

2. NETWORKING LET’S NETWORK
 On
completion of this chapter, you will be
able to perform the following tasks:



Describe how data traffic is exchanged between
source and destination devices
Identify the roles and functions of a hub, switch,
and router, and where they best fit in the
network
Select the appropriate Cisco equipment for a
given set of network requirements

3. NETWORKING LET’S NETWORK
Mobile
Users
Home
Office
Internet
Branch Office
Main Office

4. NETWORKING LET’S NETWORK

5. NETWORKING LET’S NETWORK

6. NETWORKING LET’S NETWORK
Application
Application
(Upper)
Layers
Presentation
Session
Transport Layer
Network layer
Data link
Physical
Data
Flow
Layers

7. NETWORKING LET’S NETWORK
EXAMPLES
Application
Presentation
Session
Transport Layer
Network Layer
Data Link
Physical
User Interface
Telnet
FTP
•How data is presented
•Special processing such
as encryption
ASCII
EBCDIC
JPEG
Keeping different
applications’
data separate
Operating
System/
Application
Access
Scheduling

8. NETWORKING LET’S NETWORK
Application
Presentation
EXAMPLES
Session
• Reliable or unreliable delivery
• Error correction before retransmit
TCP
UDP
SPX
Network
Provide logical addressing which
routers use for path determination
IP
IPX
Data Link
• Combines bits into bytes and
bytes into frames
• Access to media using MAC address
• Error detection not correction
Physical
• Move bits between devices
• Specifies voltage, wire speed and
pin-out cables
Transport
802.3 /
802.2
HDLC
EIA/TIA
-232
V.35

9. NETWORKING LET’S NETWORK
Encapsulating Data
Application
Presentation
Session
Upper Layer Data
Transport
TCP Header Upper Layer Data
PDU
Seg
ment
Network
IP Header
Data
LLC Header
Data
FCS
MAC Header
Data
Pack
et
Data Link
Frame
Physical
Bits
FCS
0101110101001000010

10. NETWORKING LET’S NETWORK
De-encapsulating Data
Application
Presentation
Session
Upper Layer Data
Transport
Upper Layer Data
Network
Data Link
TCP+ Upper Layer Data
IP + TCP + Upper Layer Data
LLC Hdr + IP + TCP + Upper Layer Data
Physical
0101110101001000010

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Physical Layer Functions
Defines
• Signaling type
802.3
• Connector type
Physical
• Media type

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Host
Hub
Hosts
10Base2—Thin
Ethernet
10Base5—Thick
Ethernet
10BaseT—Twisted Pair

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Hubs Operate at Physical layer
Physical
A
B
C
D
• All devices in the same collision domain
• All devices in the same broadcast domain
• Devices share the same bandwidth

14. NETWORKING LET’S NETWORK
 For
more tutorials please keep on visiting the
page regularly at
www.facebook.com/networkingletsnetwork
---------------------THANKING YOU------------------