CCNA NOTES FULL.pdf

CCNA NOTES FULL.pdf

Citation preview

NETWORK ESSENTIALS 1. 2. 3. 4. 5.

Introduction Cables, Connectors Standards – Ethernet – Token Ring – FDDI OSI Reference Model Types of Service

II. TCP/IP Basics III. TCP/IP Addressing and Subnetting IV. CISCO Router Hardware Basics V. CISCO Router IOS Basics VI. CISCO Router IOS Management VII. ROUTING VIII. WAN Technologies IX. ACCESS LIST X. SWITCH Basics XI. VLAN Concepts and Configuration XII. INTER-VLAN Concepts XIII. VTP/STP Concepts XIV. NAT

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. b. c. d. e. e. f.

CAT 1 CAT 2 CAT 3 CAT 4 CAT 5 CAT 5e CAT 6

used for telephone (1 pair ) 4 MbPS for token ring (2 pairs) 10 MbPS for Ethernet (4 pairs) 16 MbPS for Fast Token Ring (4 pairs) 100 MbPS for Fast Ethernet (4 pairs) 1 GbPS for Gigabit Ethernet 1 Gbps for MultiGigabit

CABLE SPECIFICATIONS Gigabit Fast Ethernet

1000 BASE T 10 BASE T 100 BASE T 100 BASE TX

1000MbPS 10 MbPS 100 MbPS 100 MbPS

Baseband Twisted Pair ( 100 mts ) Baseband Twisted Pair ( 100 mts ) Baseband (220 mts )

Connector RJ 45 STP Connector RJ 45, RJ 11, RS- 232, RS -449 155 MbPS Connections STRAIGHT THROUGH ( T568A – T568 A ) CROSS OVER ( T568A – T568 B)

1. 2.

STRAIGHT THROUGH T 568 A Green White (TX + ) Green ( TX- ) Orange White ( RX + ) Blue Blue White Orange ( RX- ) Brown White Brown

1. 2. 3. 4. 5. 6. 7. 8.

T 568 A Green White Green Orange White Blue Blue White Orange Brown White Brown

[1-3, 2-6 ]

CROSS OVER T 568A Green White [TX +] Green [TX -] Orange White [RX +] Blue Blue White Orange [RX -] Brown White Brown

1. 2. 3. 4. 5. 6. 7. 8.

T 568 B Orange White Orange Green White Blue Blue White Green Brown White Brown

COAXIAL CABLE [ RG /68] 1. 2.

THIN NET [ 0.25 “] THICK NET [0.4 “]

CABLE SPECIFICATION 10 Base 2 10 Base 5

Thin net Thick net

200 mts [6 mm] 500 mts [13 mm]

Connectors BNC [BAYONET- NEILL-CONCELMAN] It includes T-connector Parallel connector Terminator VAM PIRE TAP BNC

Standard Ethernet [ thick net] Thin Ethernet

FIBER OPTIC SPECIFICATION 1000 Base LX 1000 Base SX 10 Base F

Long wavelength , Multimode [ 3 km] or Single Mode [100 km ] Short wavelength, 2000 mts

FIBER OPTIC Multi Mode Single Mode

used LED used in LAN’s used LASER used in telephone network

Connectors * SC * ST NETWORK TECHNOLOGIES 1. 2. 3.

ETHERNET TOKEN RING FDDI [Fiber Distributed Data Interface ]

ETHERNET  

10 MbPS Revisions o Fast Ethernet [ IEEE 802.3U ] 100 MbPS o Gigabit Ethernet [ IEEE 802.5 ] 100 MbPS or 1 GbPS

CSMA/CD [Carrier Sense Multiple Access / Collision Detection]  

Ethernet` at Data Link layer is responsible for Ethernet addressing, commonly referred to as hardware addressing or MAC addressing Ethernet is also responsible for framing packets received from the network layer and preparing them for transmission on the local network through Ethernet CONTENTION Media Access Method

ETHERNET FRAME FORMAT IEEE 802.3 PRE

SFD

DA

SA

LENGTH/TYPE

DATA/PAD

FCS

PRE – Preamble – 7 bytes in alternating 1’s, 0’s – indicating the receiver stations that frame is coming SFD – Start Frame Delim