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Basic Networking Components. David Ingles. Basic parts of the network. Hub Switch Router Bridge Gateway Firewall Wireless AP. Network Hubs. Hubs sends data from one computer to all other computers on a network Operates on Layer 1 of OSI model

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Basic parts of the network
Basic parts of the network

  • Hub

  • Switch

  • Router

  • Bridge

  • Gateway

  • Firewall

  • Wireless AP


Network hubs
Network Hubs

  • Hubs sends data from one computer to all other computers on a network

  • Operates on Layer 1 of OSI model

  • Acts as a “repeater” for signal passing through

  • Declining in use in favor of switches and routers


Switches
Switches

  • Relays traffic using Layer 2 address

  • Contains software that supports building of routing tables

  • Substantial improvement over Hubs

  • Used to join multiple computers to a LAN


Bridges
Bridges

  • Similar to a switch in function

  • Used to combine two or more independent networks into a single unit

  • Usually associated with LAN device using MAC addresses

  • Operates on OSI layers 1 and 2


Routers
Routers

  • More powerful than hubs, switches, or bridges

  • Principal operations at OSI layer 3 with IP Addresses

  • Often configured as Firewalls

  • Utilize extensive network management features

  • Can be configured to operate as Bridges

  • Used to connect multiple computers together as a LAN and provide connection to WAN


Wireless access points
Wireless Access Points

  • Connects wired and wireless networks

  • Operates at IEEE 802.11 specifcations

  • Many Routers have WAP features integrated into them

  • Used to connect wireless devices to a network


Gateways
Gateways

  • Network node used to interface with networks using other protocols

  • Can operate at any network level

  • Serves as access point to another network

  • Usually integrated into other hardware


Firewalls
Firewalls

  • Protects computers from unauthorized access

  • Hardware or software-based

  • Often integrated into Routers or switches



Price ranges
Price Ranges

  • Hubs- $15- $1000

  • Switches $50-$100,000

  • Bridges $20-$4000

  • Routers $10- $1500

  • WAPs $10- $4000

  • Gateways $10-$12000

  • Firewalls $150- $200,000 for hardware

    • $20-$500 for software


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