Introduction About CCNA Networking

Getting certified is important for successful professional career in IT- Networking as it adds weight to your profile and resume. ... Hence Cisco Certification has value. CCNA is virtually a gateway to networking as it explains fundamental concepts clearly.

"You have to know some little bit knowledge before start Career in Cisco Certified Network Associate CCNA."

NETWORK ESSENTIALS

Types of Network

1.                  LAN

2.                  WAN

3.                  INTERNET

Types of LAN

1.                  Client/Server

2.                  Peer to Peer

Network Components

1.                  Network Hardware

2.                  Network Software

Network Hardware

1.                  Network Interface Card ( NIC )

2.                  Transmission Media

3.                  Two or more Computers

4.                  Network Devices

Network Software

1.                  Network Operating System ( NOS)

Transmission Media

1.                  Twisted Pair Cable

2.                  Coaxial Cable

3.                  Fiber Optic Cable

4.                  Wireless LAN

TIA Standard (Telecommunication Information Association)

Twisted Pair Cable

1.                  Unshielded twisted pair ( UTP)

2.                  Shielded twisted pair ( STP)

UTP categories

a.         CAT 1   used for telephone (1 pair)

b.         CAT 2   4 MbPS for token ring (2 pairs)

c.         CAT 3   10 MbPS for Ethernet (4 pairs)

d.         CAT 4   16 MbPS for Fast Token Ring (4 pairs)

e.         CAT 5   100 MbPS for Fast Ethernet (4 pairs)

e.         CAT 5e             1 GbPS for Gigabit Ethernet

f.          CAT 6   1 Gbps for Multi Gigabit

CABLE SPECIFICATIONS

Gigabit            1000 BASE T                1000MbPS

Fast                  10 BASE T                    10 MbPS          Baseband Twisted Pair (100 mts)

Ethernet          100 BASE T                  100 MbPS        Baseband Twisted Pair (100 mts)

                        100 BASE TX                100 MbPS        Baseband (220 mts)

Connector RJ 45

STP Connector

RJ 45, RJ 11, RS- 232, RS -449

155 MbPS

Connections

1.                  STRAIGHT THROUGH ( T568A – T568 A )

2.                  CROSS OVER ( T568A – T568 B)

STRAIGHT THROUGH

T 568 A                                                            T 568 A

1.         Green White (T_X +)                                          Green White

2.         Green (TX-)                                                     Green

3.         Orange White (RX +)                          Orange White

4.         Blue                                                                 Blue

5.         Blue White                                                      Blue White

6.         Orange (RX-)                                       Orange

7.         Brown White                                                   Brown White

8.         Brown                                                              Brown

                                    [1-3, 2-6 ]

CROSS OVER

            T 568A                                                             T 568 B

1.         Green White [TX +]                                         Orange White

2.         Green [TX -]                                                    Orange

3.         Orange White [RX +]                                      Green White

4.         Blue                                                                 Blue

5.         Blue White                                                      Blue White

6.         Orange [RX -]                                      Green

7.         Brown White                                                   Brown White

8.         Brown                                                              Brown

NETWORK TOPOLOGIES

Defines Network Device Organization

Four common types

• BUS Topology
• TREE Topology
• STAR Topology
• RING Topology

THESE ARE THE BASIC KNOWLEDGE THAT YOU HAVE TO KNOW BEFORE START CAREER IN INFORMATION TECHNOLOGY (IT).

AUTHOR,

Nitin Sharma

pursuing BCA from Amity University.