1. Examining the Network

2. Overview

Scope of Networks

Basic Connectivity Components

Network Topologies

Network Technologies

Expanding the Network

3. Scope of Networks Local AreaNetwork Wide Area Network 4.

Basic Connectivity Components

Network Adapters

Network Cables

Wireless Communication Devices

5. Network Adapters

Receive data and convert it into electrical signals

Receive electrical signals and convert them into data

Determine if the data received is for a particular computer

Control the flow of data through the cable

6. Network Cables Types of Cables Coaxial ThinNet ThickNet 10Base2, 10Base5 Fiber-Optic Twisted-Pair Unshielded (UTP) Shielded (STP) 10BaseT 7. Wireless Communication Devices Wireless Communication Devices Narrowband Radio Transmission Infrared Transmission 8.

Network Topologies

Bus Topology

Star Topology

Ring Topology

Mesh Topology

Hybrid Topologies

9. Bus Topology Terminator Segment Terminator 10. Star Topology Hub 11. Ring Topology 12. Hybrid Topologies Star-Bus Bus Star-Ring 13.

Network Technologies

Ethernet

Token Ring

Asynchronous Transfer Mode (ATM)

Fiber Distributed Data Interface (FDDI)

Frame Relay

14. Ethernet Collision Detection Carrier Sense Multiple Access Detects signal Transmits signal Collision detected Characteristics Description Access Method CSMA/CD Transfer Speed Standard Ethernet 10 Mbps Fast Ethernet 100 Mbps Gigabit Ethernet 1 Gbps (1000 Mbps) 15. Token Ring Characteristics Description Access Method Token passing Transfer Speed 4 to 16 Mbps for all cable types PhysicalRing LogicalRing MSAU 16. Asynchronous Transfer Mode Characteristics Description Access Method Point-to-point. Transfers fixed-sized packets from one computer to another through ATM switching equipment Transfer Speed Fiber-optic at 155 Mbps to 622 MbpsATMSwitch ATM Switch ATM Switch Cell Cell 17. Fiber Distributed Data Interface Characteristics Description Access Method Token passing Transfer Speed Fiber-optic at 155 Mbps to 622 Mbps Primary Ring Secondary Ring 18. Frame Relay Main Office Branch Offices Frame Relay Network Frame Frame Frame Characteristics Access Method Transfer Speed Description Point-to-point Dependent upon transmittal capabilities of digital leased lines 19.

Expanding the Network

Repeaters and Hubs

Bridges

Switches

Routers

Gateways

Remote Access Connectivity Types

Public Switched Telephone Network (PSTN)

Integrated Services Digital Network (ISDN)

X.25

Asymmetric Digital Subscriber Line (ADSL)

20. Repeaters and Hubs Repeater Hub Repeater Transmits data toall connected computers Hub Transmits data to all connected computers in a star topology 21. Bridges Bridge 22. Switches Switch 23. Routers Router Router Router Router 24. Gateways Gateway Ethernet Token Ring 25. Remote Access Connectivity Types Dial-up Remote Access RemoteAccess Client RemoteAccess Server Virtual Private Network RemoteAccess Client Windows 2000VPN Server Corporate Intranet Internet Tunnel 26. Public Switched Telephone Network (PSTN)Analog Modem Analog Modem Client Server

Analog Voice Data

Worldwide Availability

Analog Modem

56 Kbps

PSTN TelephoneWires 27. Integrated Services Digital Network (ISDN)ISDNModem ISDNModem ISDN Client Server

International Communication Standard

Digital Transmission

Extends over Local Telephone Exchange

ISDN Modem

64 Kbps or Faster

Digital Telephone Lines or Telephone Wires 28. X.25 Modem

Based on Packet Switching

X.25 Packet Assembler/Disassembler (PAD)

Client Configuration

Server Configuration

X.25 X.25 SmartCard Client Server PAD Service 29. Asymmetric Digital Subscriber Line (ADSL) LAN Adapter

Copper Telephone Lines

Simultaneous Voice and Data Transmission

1.5 to 9 Mbps Downstream Rate

16 to 640 Kbps Upstream Rate

LAN Interface or Dial-up Interface

ADSL LAN Adapter ATM Adapter ATM Adapter Client Server ADSL Wires 30. Lab A: Examining the Network Architecture 31. Review

Scope of Networks

Basic Connectivity Components

Network Topologies

Network Technologies

Expanding the Network