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NAME : Sanam SuriNAME : Sanam Suri

Roll # 49Roll # 49

BCA 2BCA 2ndnd YearYearBVIMRBVIMR

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NETWORK DEVICES

MODEM

HUB

SWITCH

ETHERNET CARD

REPEATER

RJ-45 CONNECTOR

GATEWAY

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MODEM

It is a computer peripheral that allows you to connect and

communicate with other computer via telephone line.Modem changes the digital data from your computer intoanalog data, a format that can be carried over telephonelines.

Vice-Versa the the modem receiving the call thenchanges the analog signal back into digital data that thecomputer can understand.

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EHTERNET CARD

Newer Ethernet cards installed inside desktopcomputers use the PCI standard and are usuallyinstalled by the motherboard manufacturer.

Ethernet cards may operate at different network

speeds depending on the protocol standard theysupport.

Old Ethernet cards were capable only of the10 Mbps maximum speed offered by Ethernet

originally.

Modern Ethernet adapters all support the 100Mbps Fast Ethernet standard and an increasingnumber now also offer Gigabit Ethernet support at 1

Gbps (1000 Mbps)

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RJ-45CONNECTOR

The Registered Jack-45 connector is commonly used for

network cabling and for telephony applications.

It is an eight wire connector which is commonly used toconnect computers on the local area networks, especially

Ethernets.

It is similar to telephone connector RJ-11 except that it has

eight wires as compared to 4 in RJ-11.

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Straight Cable

Connect a computer to a switch/hub's normalport.

Connect a computer to a cable/DSL modem'sLAN port.

Connect a router's WAN port to a cable/DSLmodem's LAN port.

Connect a router's LAN port to a switch/hub'suplink port. normally used for expandingnetwork

5) Connect 2 switches/hubs with one of theswitch/hub using an uplink port and the other

one using normal port.

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Connect 2 computers directly.

Connect a router's LAN port to a switch/hub's

normal port. (normally used for expandingnetwork)

Connect 2 switches/hubs by using normal portin both switches/hubs.

Crossover Cable

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HUBIt is used to connectseveral computers

together.

A network device theinformation flow isaccumulated and then

distributed to variousgroups and users.

It can be betweenusers on the same LANand users on differentLANs.

It Broadcasts thePackets

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Network switches appear nearly identical to network

hubs, but a switch contains more "intelligence" than anetwork hub.

Network switches are capable of inspecting datapackets as they are received, determining the sourceand destination device of that packet, and forwarding itappropriately.

By delivering each message only to the connected

device it was intended for, a network switch conservesnetwork bandwidth and offers generally betterperformance than a hub.

Switches differ from hubs in that they can have ports ofdifferent speed.

It unicasts the packets

Switch

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Routers

A router is a computer whose software andhardware are usually tailored to the tasks of

routing and forwarding.

This device routes the information packetbetween two or more physically or logicallyconnected networks.

It is different from Bridge as this uses logicaladdress while bridge uses physical address.

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Bridge

It is a device that lets you link two samenetworks together.

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It is a device that amplifies and restores the

power of a signal being transmitted on the

network.

It is used in long network lines.

Repeater

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Difference

Repeaters Bridges

OSI layer Physical layer Data link layer

Data

regeneration

Regenerate data at

the signal level

Regenerate data

at the packet

levelReduce network

traffic

No Yes

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Gateway

This device usually a server is used to communicatebetween dissimilar networks i.e. networks with

different protocols. e.g. to connect a LAN of BVIMR with a LAN of

BVCOE.

In enterprises, the gateway is the computer that

routes the traffic from the workstation to theoutside world.

In homes, the gateway is the ISP that connects theuser to the Internet.

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THANK YOU!