Networking Networking DevicesDevices

Hang Pham Hang Pham

Jared JelacichJared Jelacich

David RamirezDavid Ramirez

What are Network What are Network Devices?Devices?

A computer network is any set of computers A computer network is any set of computers or devices connected to each other or devices connected to each other

Networks generally involve at least two Networks generally involve at least two devices capable of being networked with at devices capable of being networked with at least one usually being a computer. least one usually being a computer.

Examples Internet wide area network: that is the largest to ever wide area network: that is the largest to ever

exist, or a small homeexist, or a small home local area network (LAN) with two computers local area network (LAN) with two computers

connected with standard networking cables connected with standard networking cables connecting to a network interface card in each connecting to a network interface card in each computer. computer.

Modems and RoutersModems and Routers

Cable/DSL ModemCable/DSL Modem

Wireless RouterWireless Router

8-Port Switch & Cat 5 Cable8-Port Switch & Cat 5 Cable

Network Interface Card (NIC)Network Interface Card (NIC)

Wireless AdaptersWireless Adapters

PCI AdapterPCI Adapter PC Card PC Card

Wireless USB AdapterWireless USB Adapter

LAN – WiredLAN – WiredLocal Area NetworkLocal Area Network

The Internet

DSL or Cable Modem

Linksys 8-Port Switch

Airlink Wireless Router

Workstation 1 Workstation 2 Workstation 3 Workstation 4 Workstation 5 Workstation 6

Workstation 7 Workstation 8

Major Brands of Products Major Brands of Products and Costand Cost

Brand: Brand: NETGEARNETGEAR   (Port Switch)(Port Switch)

Price:Price:$42.99$42.99 Nortel ENET SWITCH 470Nortel ENET SWITCH 470 Price:Price:

$1,976.27 $1,976.27

Brand: Brand: D-Link Systems D-Link Systems (Cable Modem)(Cable Modem)

Price: Price: $59.04$59.04 Motorola Motorola Price: Price: $108$108

BridgesBridges,,Network Network

Segments, Segments, Data link Data link layer and layer and Switch's Switch's

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

Linksy: home use, price Linksy: home use, price range $40- range $40-

$200$200 Zyxel: company use, price Zyxel: company use, price

range $100-$400range $100-$400

A A network segmentnetwork segment is a is a portion of a computer network portion of a computer network separated by a computer separated by a computer networking device, including:networking device, including:

Repeater or Ethernet hub Repeater or Ethernet hub Bridge or switch Bridge or switch Router Router

Hub and Router Hub and Router pricesprices

Chanel plus: Chanel plus: $300-$500$300-$500

Nortel Hubs: Nortel Hubs: $1,200-$3,000$1,200-$3,000

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

Types of Switch's Types of Switch's

Non managed Non managed Managed Managed Smart / intelligent Smart / intelligent

Unmanaged switches have no Unmanaged switches have no configuration interface. They are configuration interface. They are typically found in SOHO typically found in SOHO environmentsenvironments

Managed switches are found in Managed switches are found in medium/large network environments medium/large network environments and come at a higher price and and come at a higher price and quality. The task of managing usually quality. The task of managing usually requires understanding of Layer 2 requires understanding of Layer 2 networks. networks.

Smart (or intelligent) switches are Smart (or intelligent) switches are usually managed switches with a usually managed switches with a limited set of features.limited set of features.

Switch PricesSwitch PricesLinksy: $20-$60Linksy: $20-$60Cisco: $200-$400Cisco: $200-$400Netgear:$40-$75Netgear:$40-$75

•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

Home Users Small Business users

Netgear DS100 10/100 Mbps Dual Speed Hub

$69.00

3Com OfficeConnect Ethernet Hub

$58.74

Netgear EN104TP 4 Port 10BASE-T 10 Mbps Hub

$21.00

3Com Home Connect Home Network 10 Mbps Ethernet Hub

$15.00

•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.

Home Users Small Business users

Netgear DS100 10/100 Mbps Dual Speed Hub

$69.00

3Com OfficeConnect Ethernet Hub

$58.74

Netgear EN104TP 4 Port 10BASE-T 10 Mbps Hub

$21.00

3Com Home Connect Home Network 10 Mbps Ethernet Hub

$15.00

Questions?