Network switch and information switch vs router
Network switch introduction
This is layer 2 device (data link layer devices) mostly. It is use for star topology; it is used to extend the network connectivity.
A network switch is used in a wired network ot connect to other device using ethernet cables. The switch allows each connected device to talk to the others. Wireless only networks do not use switch because devices such as wireless routers and adapters communicate directly with one another.
Although you can use the ports on the back of a router or modem to connect a few ethernet devices together, switch offer a number of advantages:
Switches allow you to connect dozens of devices.
Switches keep traffic between two devices from getting in the way of your other device on the same network.
Switches allow you to control who has access to various parts of the network.
Switches allow you to monitor usage.
Switches allow communication (withing your network) that's even faster than the internet.
High end switches can be tailored to your network needs with pluggable modules.
Types of switches in networking
1. Manageable switch
2. Non-manageable switch
- Manageable switch:-
It is consisting system (ios) and it is useful for manage division of LAN.
- Non-manageable switch:-
This switch is simple switch only use for to transfer packet from source to destination.
Manageable switch and non-manageable switch when start at 1st time they collect mac-address table of the all resources in the network and after that directly transfer data in the network and after that directly transfer data between source to destination.
Technology used in network switch
1. Cut through switch.
2. Modified cut through switch
3. Store and forward.
- Cut through switch:-
In this technology only mac-address read and transfer to destination.
- Modified cut through:-
In this technology all packetsare received, modified it 64-bit and transfer to the destination.
- Store and forward:-
In the technology all the package are store in the switch then remove error of the frame, regenerate, packers transfer to the destination.
Manufacture of network switch
- Cisco
- Juniper
- 3com
- Hp
- D-link....etc.
Layer of network switches
1. Access layer:-
It is consist 2900, 2950, 2960 series of switch mostly use in small offices and small network.
2. Distribution layer:-
This is called multilayer switch in this type there are 3500, 3700, 3800, 3900, 4600 switches are included.
3. Core layer:-
This is the backbone of any ISP. This switch is generally use in data center. This switch consist 10000, 12000, 2000, 1000, 5000, 7000, 9000 switches.
Network switch LED indicator
1. System LED:-
It is show whether the system is receiving power and properly work, if it is off there is no power functionality. If it is Amber then it is not receive proper power supply.
2. Rsp LED (redundancy power supply):-
Provide the backup power supply indicator.
3. Port status LED:-
It is used to view the status of the led, if the led is off there is no link or it is shutdown, if the led is green link is present, if the the led is alternating green amber indicating link fault, if the led is Amber the port is black.
4. Duplex mode led:-
If the port is green them it work on full duplex and if it is amber then it is half duplex.
5.port speed led:-
If the compatible speed is work then it is green and the speed is lowest then it indicate amber.
6. Poe (port on ethernet):-
Poe indicator mode.
Switch configuration with password
- How to access switch:-
Start---accessories---communication---hyperterminal---comi---ok---restore default---ok---ok then you will get.
Switch>en
Switch#config t
Switch(config)#
- How to break password of switch:-
When we fill up the password in the switch it is save in the text file. When we want to break the password we need to rename this text file
Step 1: on/off the switch
Step 2: press the mode button in front of switch
Step 3: release mode button when system led blink umber and then turn solia green.
Switch: flash_init
Switch: load_helper
Switch: dir flash:
Switch: rename flash:config textflash:config.old
Switch: boot
After that you have massage appear would you like toenter basic management setup-----enter "no"
Switch>en
Switch#rename flash: config.old flash:config.text
Switch#copy flash: config.txt system: running-config
Switch#config t
Switch (config)#line console 0
Switch (config-line)#pass ccna
Switch (config-line)#line vty 0.4
Switch (config-line)#pass ccna
Switch (config-line)#login
Switch (config)#enable secret ccna
Switch (config)#ctrl+z
Switch#wr
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- What is network topology? Best guide to types and network topology
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- CCNA (cisco certified network associate) details by blog
Network Switch VS Router
- What is a switch?
- What is a router?
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