REDES INFORMATICAS

Examining the Network

Overview
Scope of Networks
Basic Connectivity Components
Network Topologies
Network Technologies
Expanding the Network

Scope of Networks Local Area Network Wide Area Network

Network Adapters
Network Cables
Wireless Communication Devices

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

Network Cables Types of Cables Coaxial ThinNet ThickNet 10Base2, 10Base5 Fiber-Optic Twisted-Pair Unshielded (UTP) Shielded (STP) 10BaseT

Wireless Communication Devices Wireless Communication Devices Narrowband Radio Transmission Infrared Transmission

Network Topologies
Bus Topology
Star Topology
Ring Topology
Mesh Topology
Hybrid Topologies

Bus Topology Terminator Segment Terminator

Star Topology Hub

Ring Topology

Hybrid Topologies Star-Bus Bus Star-Ring

Ethernet
Token Ring
Asynchronous Transfer Mode (ATM)
Fiber Distributed Data Interface (FDDI)
Frame Relay

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)

Token Ring Characteristics Description Access Method Token passing Transfer Speed 4 to 16 Mbps for all cable types Physical Ring Logical Ring MSAU

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 Mbps ATM Switch ATM Switch ATM Switch Cell Cell

Fiber Distributed Data Interface Characteristics Description Access Method Token passing Transfer Speed Fiber-optic at 155 Mbps to 622 Mbps Primary Ring Secondary Ring

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

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)

Repeaters and Hubs Repeater Hub Repeater Transmits data to all connected computers Hub Transmits data to all connected computers in a star topology

Bridges Bridge

Switches Switch

Routers Router Router Router Router

Gateways Gateway Ethernet Token Ring

Remote Access Connectivity Types Dial-up Remote Access Remote Access Client Remote Access Server Virtual Private Network Remote Access Client Windows 2000 VPN Server Corporate Intranet Internet Tunnel

Public Switched Telephone Network (PSTN) Analog Modem Analog Modem Client Server
Analog Voice Data
Worldwide Availability
Analog Modem
56 Kbps
PSTN Telephone Wires

Integrated Services Digital Network (ISDN) ISDN Modem ISDN Modem 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

X.25 Modem
Based on Packet Switching
X.25 Packet Assembler/Disassembler (PAD)
Client Configuration
Server Configuration
X.25 X.25 Smart Card Client Server PAD Service

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

Lab A: Examining the Network Architecture

Review
Scope of Networks
Network Topologies

REDES INFORMATICAS

by RoyTello

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