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TRN VN HNG

MCT 2005 - 2011, CCSI #30806

Mobile: 0903 630 980 or 0905450145

Email: hung.tran@truongtan.edu.vn

hung.tran@bachhung.net

Website: www.truongtan.edu.vn

Basic Lan Devices

Cable

Device

CableSTP, UTP

Coaxial

Fiber Optic

Shielded twisted-pair (STP)

mailto:hung.tran@truongtan.edu.vnmailto:hung.tran@bachhung.nethttp://www.truongtan.edu.vn/http://www.truongtan.edu.vn/mailto:hung.tran@bachhung.netmailto:hung.tran@truongtan.edu.vn

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Unshielded twisted-pair UTP) Coaxial Cable

Fiber Optic Cable

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TIA/EIA-568-A: Twisted-pair cables Category 1 is used for telephone and is not suitable for

transmitting data.

Category 2 is capable of transmitting data at speeds up to 4 Mbps.

Category 3 is used in Ethernet, and can transmit data at speeds upto 10 Mbps.

Category 4 is used in Token Ring, and can transmit data at speedsup to 16 Mbps.

Category 5 can transmit data at speeds up to 100 Mbps.

Category 5e can transmit data at speeds up to 1000 Mbps.

Category 6 can transmit data at speeds up to 10 Gbps.

Making cables

Making Ethernet 10Base-T cables:

Straight-thru cable: PC Hub, PC Switch,Hub Router, Switch Router

Crossover cable: PC PC, Hub Hub, SwitchSwitch, Hub Switch, Router Router, PC Router

Making console cables:

Rollover cable:

Serial port-to-console port of Cisco equipments.

10Base-T: NIC network port

1:Transmit

2:Transmit

3:Receive

4:Not used

5:Not used

6:Receive

7:Not used8:Not used

10Base-T: HUB network port

1:Receive

2:Receive

3:Transmit

4:Not used

5:Not used

6:Transmit

7:Not used8:Not used

10Base-T: T568-B

1:White Orange

2:Orange

3:White Green

4:Blue

5:White Blue

6:Green

7:White Brown

8:Brown

10Base-T: T568-A

1:White Green

2: Green

3: White Orange

4:Blue

5:White Blue

6:Orange

7:White Brown

8:Brown

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Straight-thru cable

1:White Orange

2:Orange

3:White Green

4:Blue

5:White Blue

6:Green

7:White Brown

8:Brown

1:White Orange

2:Orange3:White Green

4:Blue

5:White Blue

6:Green

7:White Brown

8:BrownPC HUB

Crossover cable

1:White Green

2:Green3:White Orange

4:Blue

5:White Blue

6:Orange

7:White Brown

8:Brown

1:White Orange

2:Orange3:White Green

4:Blue

5:White Blue

6:Green

7:White Brown

8:Brown PC PC

Cut a length of cable Strip off the jacket

Separate the wires Untwist the wires

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Organize and flatten wires Insert wires into RJ-45 plug

Push the wires in Inspect the color code

Crimp down the wires Inspect both ends

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Test the quality of cable

Network Devices

PC - Hosts Laptop

PDA Server

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Server System

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ModemADSL

Analog Phone IP Phone

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IP Phone (cont)NIC

10Base-T: RJ-45 jacks 10Base-T: Transceiver

Gigabit Ethernet GBIC_SFP LAN Device: Repeater

- Regenerates and repeats the signal

- Layer 1 device.

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LAN Device: Hub

A multi-port repeater.

Layer 1 device.

10Base-T: Hub

OSI Review: Layer 2

Responsibility:

Provides for the reliable transfer of

data cross a physical link.

Concerned:

Frames.

Physical address (HW or MAC)

Error and flow control.

LAN Device: NIC

Network interface of hosts.

Build-in physical address.

Layer 2 device.

LAN Device: Bridge

Keeps traffic local by filtering traffic

based on physical addresses.

Layer 2 device.

LAN Device: Switch

A multi-port bridge.

Layer 2 device.

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LAN Switch Switch 29xx

Switch 65xx

OSI Review: Layer 3 Responsibility:

Connection and path selectionbetween two end system acrossnetworks.

Concerned:

Packets.

Logical address: Hierarchical. Networks and Hosts addressing.

Route , Routing table, Routingprotocol.

LAN Device: Router

Makes decisions based on network

addresses (logical addresses).

Layer 3 device.

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Cisco 2600 Series Router 7600

Data flow over Routers

Router Functions Path determination:

The process of evaluating a packets destinationIP address so that the router can decide whichport to send out the packet.

Packet switching:

The router re-encapsulates the packet in theprotocol needed for the specified port and thenswitches the packet out that port.

Devices function at Layers

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TOPOLOGIES

Physical Topologies

Physical Topology: Bus

Single backbone

All hosts directly

connected to

backbone

Each end of the

bus must be

properlyterminated

Physical Topology: Ring

No backbone

A host is directly

connected to

each of its

neighbors

Physical Topology: Star

All devices

connected to a

central point

Center of star is

usually a hub or

a switch

Physical Topology: Extended Star

Connects individualstar topologiestogether.

At the center of thestar is a hub or aswitch.

Extends the lengthand size of thenetwork.

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Logical Topology: Broadcast

Each host on the LAN sends its

data (or broadcasts its data) to

every other host.

First-come, first-serve.

LAN Media Symbols

Wireless Communication

No wires.

Challenges:

Distance.

Obstacle.

Bandwidth

Security.