Network

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23 Οκτ 2013 (πριν από 3 χρόνια και 9 μήνες)

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2


CCNA



Cisco Certified Network Associate


3

Course Introduction

4

Cisco Career Certifications

Professional

CCIE

CCNP

CCNA

Associate

http://www.cisco.com/go/certifications

Recommended Training Through

Cisco Learning Partners

Required
Exam

CCNA

INTRO and
ICND

Cisco Certified Network Associate

Introduction to Cisco Networking
Technologies

and
Interconnecting
Cisco Network Devices

Expert

CCNA Exam
640
-
801


5

How to be CCNA certified ?


Option
1



Pass the CCNA exam
640
-
801


(
60
-
70
questions in
2
hours)


Option
2


Pass the INTRO exam
640
-
821


(
40
-
50
question in
1.5
hours)


+


Pass the ICND exam
640
-
811


(
40
-
50
question in
1.5
hours)

6

Cisco Different Certifications Fields

CCIE Routing

and Switching

CCNP

CCNA

Network Implementation

Network Design

None

CCNP

CCDA

or

CCNA

CCIE

Service Provider

CCIP

CCNA

Network Service Provider

CCIE

Security

CCSP

CCNA

Network Security

Voice Networks

CCIE

Service Provider

CCIP

CCNA

Storage Networking

CCIE

Voice

CCVP


CCNA

CCNA

None

CCIE

Storage Networking

7

Cisco Qualified Specialist


Access Routing and LAN Switching



Content Networking



IP Communications Certifications



Network Management Certifications



Optical Certification



Storage Networking Certifications



VPN and Security Certifications



Wireless LAN Certifications



Sales Specialist



One exam gives you one specialist certificate

8

Course Topics

-

Introduction , OSI , TCP/IP

-

Physical Layer , Data Link Layer

-

Network layer , IP Addressing , Subnetting

-

Transport Layer

-

Introduction to Cisco IOS

-

Routing Protocols ,Distance Vector ,RIP v.
1
, IGRP

-

Link State , OSPF

-

EIGRP , RIP v
2
, Route Summarization , VLSM

-

Access List , NAT

-

Switching

-

Introduction to WAN

-

ISDN

-

Frame Relay




9



Network:



is basically all the components (H/W &


S/W) involved in connecting computer across


small and large distance




Importance of Networks:


Easy access and sharing of information


Sharing of expensive devices and network


resources


Modern Technologies (IP telephony, Video


on Demand, ….etc)


Networking Technologies

10

Network components



Network has three main components



Computers

(servers and hosts)


-

Source of applications (network aware applications)


-

ex: HTTP (Hyper Text Transmission Protocol),


FTP (File Transfer Protocol),


SNMP (Simple Network Management Protocol)


Telnet




Network Devices


-

Devices that interconnect different computers together


-

ex: Repeaters, hub, bridge, switch, router, NIC and modems




Connectivity


-

Media that physically connect the computers and network devices


-

ex: Wireless and cables

11

Network Types



LAN

(Local Area Network):


It is a group of network components that work


within small area




MAN

(Metropolitan Area Network):


It is a group of LANs that are interconnected


within small area




WAN

(Wide Area Network):


It is a group of LANs that are interconnected


within large area


12

Network Topologies



Topology:


How devices are connected together



Physical Topology:

It describes how devices are physically cabled



Logical Topology:

It describes how devices communicate across


physical topology ex. unicast , broadcast , multicast

13

Reference Models

-

describe data transfer standards

-

a framework (guideline) for network
implementation and troubleshooting

-

divides complex functions in to simpler
components

-

Reference model types :

-

OSI

-

TCP/IP


14

Reference Models

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical



Application



Transport

Internet


Network
Access


15

The OSI Reference model

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

transmission example

A

B

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

16

The Application Layer

-
7
Layer

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

This layer deal with
networking applications.


Examples:



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Web browsers


PDU
-

User Data



17

The Presentation Layer

-
6
Layer

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

This layer is responsible
for presenting the data in
the required format which
may include:



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Compression


PDU
-

Formatted Data

18

The Session Layer

-
5
Layer

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

This layer establishes,
manages, and terminates
sessions between two
communicating hosts.


Example:



Client Software


( Used for logging in)


PDU
-

Formatted Data

19

The Transport Layer

-
4
Layer

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

This layer breaks up the
data from the sending host
and then reassembles it in
the receiver.


It also is used to insure
reliable data transport
across the network.


PDU
-

Segments

20

The Network Layer

-
3
Layer

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

Sometimes referred to as the
“Cisco Layer”.


Makes “Best Path
Determination” decisions
based on logical addresses
(usually IP addresses).


PDU
-

Packets

21

The Data Link Layer

-
2
Layer

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

This layer provides reliable
transit of data across a
physical link.


Makes decisions based on
physical addresses (usually
MAC addresses).


PDU
-

Frames

22

The Physical Layer

-
1
Layer

7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

This is the physical media
through which the data,
represented as electronic
signals, is sent from the
source host to the
destination host.


Examples:



啔U



䍯慸楡氠⡬(步 捡扬攠呖)



Fiber optic


PDU
-

Bits

23

Encapsulation Process

24

TCP/IP model



Application



Transport

Internet


Network
Access


7
Application

6
Presentation

5
Session

4
Transport

3
Network

2
Data Link

1
Physical

25

The Application Layer

26

The Transport Layer

reliable
service

unreliable
service

27

The Internet Layer

IP addressing , routing


28

The Network Access Layer

L
2
LAN technologies :

Ethernet , Tokenring , FDDI

L
2
WAN technologies :

Point
-
to
-
Point (HDLC , PPP) ,


Frame relay , X.
25
, ATM

29

Hierarchical Network Model