Networking Devices

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Networking Devices

• Hang Pham
• Jared Jelacich
• David Ramirez

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What are Network Devices?

• A computer network is any set of computers or
  devices connected to each other
• Networks generally involve at least two devices
  capable of being networked with at least one
  usually being a computer.
• Examples
• Internet
• wide area network that is the largest to ever
  exist, or a small home
• local area network (LAN) with two computers
  connected with standard networking cables
  connecting to a network interface card in each
  computer.

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Modems and Routers

• Cable/DSL Modem
• Wireless Router

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• 8-Port Switch Cat 5 Cable
• Network Interface Card (NIC)

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Wireless Adapters

• PCI Adapter PC Card
• Wireless USB Adapter

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LAN WiredLocal Area Network
DSL or Cable Modem
Linksys 8-Port Switch
Airlink Wireless Router
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Major Brands of Products and Cost

• Brand NETGEAR 
• (Port Switch)
• Price42.99
• Nortel ENET SWITCH 470 Price1,976.27
• Brand D-Link Systems
• (Cable Modem)
• Price 59.04
• Motorola Price 108

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Bridges,

• Network Segments, Data link layer and Switch's

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• A network bridge connects multiple network
  segments at the data link layer of the OSI model.
  Bridges are similar to repeaters or network hubs,
  devices that connect network segments at the
  physical layer, however a bridge works by using
  bridging where traffic from one network is
  managed rather than simply rebroadcast to
  adjacent network segments.

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• Linksy home use, price range 40-
• 200
• Zyxel company use, price range 100-400

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• A network segment is a portion of a computer
  network separated by a computer networking
  device, including
• Repeater or Ethernet hub
• Bridge or switch
• Router

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• Hub and Router prices
• Chanel plus 300-500
• Nortel Hubs 1,200-3,000

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• A switch is a networking device that performs
  transparent bridging at up to the speed of the
  hardware. Common hardware includes switches,
  which can connect at 10, 100, or 1000 megabits
  per second, at half or full duplex. Half duplex
  means that the device can only send or receive
  any given time, whereas full duplex can send and
  receive at the same time. The use of specially
  designed expansion also makes it possible to have
  large numbers of connections utilizing different
  mediums of networking, including Ethernet, Fibre
  Channel.

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Types of Switch's

• Non managed
• Managed
• Smart / intelligent

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• Unmanaged switches have no configuration
  interface. They are typically found in SOHO
  environments
• Managed switches are found in medium/large
  network environments and come at a higher price
  and quality. The task of managing usually
  requires understanding of Layer 2 networks.
• Smart (or intelligent) switches are usually
  managed switches with a limited set of features.

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Switch Prices

• Linksy 20-60
• Cisco 200-400
• Netgear40-75

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• The main reason for purchasing hubs rather than
  switches was the price. However this has changed
  as the prices of switches has decreased.
• Hubs can still be useful in special
  circumstances
• Connecting a protocol analyzer to a hub allows it
  to see all the traffic on the segment.
• Computer clusters require all the computers to
  receive all the traffic going to the cluster.
• A hub with a 10BASE2 port is probably the most
  inexpensive way to connect devices that only
  support 10BASE2

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Small Business users
Home Users
Netgear DS100 10/100 Mbps Dual Speed Hub
Netgear EN104TP 4 Port 10BASE-T 10 Mbps Hub
21.00
69.00
3Com OfficeConnect Ethernet Hub
3Com Home Connect Home Network 10 Mbps Ethernet
Hub
58.74
15.00
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• An Ethernet hub is a device for connecting
  multiple devices together, making them act as a
  single segment. The device is a form of mulitport
  repeater. Ethernet hubs are also responsible for
  forwarding a jam signal to all ports if it
  detects a collision.
• A jam signal is a signal that carries a bit
  pattern sent by a data station to inform the
  other stations that they must not transmit.

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Home Users
Small Business users
Netgear DS100 10/100 Mbps Dual Speed Hub
Netgear EN104TP 4 Port 10BASE-T 10 Mbps Hub
69.00
21.00
3Com OfficeConnect Ethernet Hub
3Com Home Connect Home Network 10 Mbps Ethernet
Hub
58.74
15.00
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Questions?