Router vs Switch

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					                      Router vs Switch
Routers and switches are both computer networking devices. They allow one or
more computers to be connected to other computers, networked devices, or to
other networks.

However, the functions of a hub, switch and router are quite different, even if at
times they are integrated into a single device. Routers connect two or more logical
subnets, which do not necessarily map one-to-one to the physical interfaces of the
router. The term layer 3 switches often is used interchangeably with router, but
switch is really a general term without a rigorous technical definition.
In marketing usage, it is generally optimized for Ethernet LAN interfaces and may not
have other physical interface types.

All Attributes
                          Router                           Switch

 Technical                Routers operate at Layer 3       Network switches operate at
 Specifications:          (Network) of the OSI model.      layer two (Data Link Layer)
                                                           of the OSImodel.

 Layer:                   Network     Layer   (Layer   3   Data Link Layer (Layer 2
                          devices)                         devices)

 Transmission Type:       At    Initial Level Broadcast    At    Initial Level Broadcast
                          then Uni-cast & Multicast        then Uni-cast & Multicast

 Table:                   Store    IP     address in       Store MAC address in
                          Routing tableand maintain        lookup tableand   maintain
                          address at its own.              address at its own, Switch
                                                           can Learn MAC address.

 Used           in        LAN. WAN                         LAN
 (LAN/MAN/WAN):

 Device Type:             Networking device                Networking device

 Ports:                   2/4/8                            Switch is multi port Bridge.
                                                           24/48 ports

 Data     Transmission    Packet                           Frame (L2 Switch) Frame &
 form:                                                     Packet (L3 switch)
                        Router                          Switch

 Collision:             Less                            In Full Duplex Switch no
                                                        Collision occur.

 Transmission Mode:     Full duplex                     Full duplex

 Device Category:       Intelligent Device              Intelligent Device

 Bandwidth sharing:     Bandwidth      sharing     is   If speed of switch is 10/100
                        Dynamic (Enables either         Mbps then bandwidth of
                        static or dynamic bandwidth     each and every one of its
                        sharing for modular cable       ports gets 10/100 Mbps.
                        interfaces.   The     default
                        percent-value is 0. The
                        percent-value range is 1-96.)

 Speed:                 1-10 Mbps(Wireless)      100    10/100Mbps, 1Gbps
                        Mbps (Wired)

 Routing Decision:      Take faster Routing Decision    Take    more         time    for
                                                        complicated              routing
                                                        Decision

 NAT        (Network    Can Perform NAT                 Switches can Not perform
 AddressTranslation):                                   NAT

 Faster:                In a different network          In a LAN environment L3
                        environment (MAN/ WAN)          switch is faster than Router
                        Router is faster than L3        (built     in      switchning
                        Switch.                         hardware)

 Features:              Firewall    VPN    Dynamic      Priority rt range On/Off
                        hadling of Bandwidth            setting of port VLAN
                                                        Port mirroring

 Latest Models:         Linksys WRT54GL Juniper         Alcatel's OmniSwitch 9000;
                        MX & EX series Cisco            Cisco Catalyst switch 4500
                        3900,2900,1900                  and 6500(10 Gbps),


Differences
                        Router                          Switch
                        Router                             Switch

Technical               Routers operate at Layer 3         Network switches operate at
Specifications:         (Network) of the OSI model.        layer two (Data Link Layer)
                                                           of the OSImodel.

Layer:                  Network     Layer   (Layer     3   Data Link Layer (Layer 2
                        devices)                           devices)

Table:                  Store    IP     address in         Store MAC address in
                        Routing tableand maintain          lookup tableand   maintain
                        address at its own.                address at its own, Switch
                                                           can Learn MAC address.

Used           in       LAN . WAN                          LAN
(LAN/MAN/WAN):

Ports:                  2/4/8                              Switch is multi port Bridge.
                                                           24/48 ports

Data     Transmission   Packet                             Frame (L2 Switch) Frame &
form:                                                      Packet (L3 switch)

Collision:              Less                               In Full Duplex Switch no
                                                           Collision occur.

Bandwidth sharing:      Bandwidth      sharing     is      If speed of switch is 10/100
                        Dynamic (Enables either            Mbps then bandwidth of
                        static or dynamic bandwidth        each and every one of its
                        sharing for modular cable          ports gets 10/100 Mbps.
                        interfaces.   The     default
                        percent-value is 0. The
                        percent-value range is 1-96.)

Speed:                  1-10 Mbps(Wireless)          100   10/100Mbps, 1Gbps
                        Mbps (Wired)

Routing Decision:       Take faster Routing Decision       Take    more     time    for
                                                           complicated          routing
                                                           Decision

NAT        (Network     Can Perform NAT                    Switches can Not perform
AddressTranslation):                                       NAT
                          Router                         Switch

 Faster:                  In a different network         In a LAN environment L3
                          environment (MAN/ WAN)         switch is faster than Router
                          Router is faster than L3       (built     in      switchning
                          Switch.                        hardware)

 Features:                Firewall    VPN    Dynamic     Priority rt range On/Off
                          hadling of Bandwidth           setting of port VLAN
                                                         Port mirroring

 Latest Models:           Linksys WRT54GL Juniper        Alcatel's OmniSwitch 9000;
                          MX & EX series Cisco           Cisco Catalyst switch 4500
                          3900,2900,1900                 and 6500(10 Gbps),


Similarities
                     Router                            Switch

 Transmission        At Initial Level Broadcast then   At Initial Level Broadcast then
 Type:               Uni-cast & Multicast              Uni-cast & Multicast

 Device Type:        Networking device                 Networking device

 Transmission        Full duplex                       Full duplex
 Mode:

 Device Category:    Intelligent Device                Intelligent Device


Notes: More network, Cisco, router, switch and network hardware tips you can visit:
http://blog.router-switch.com/category/reviews/

				
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