Switches / Hubs

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A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Related Topics

  1. Routers
  2. Networking
  3. Networking Hardware-Other
  4. Network Architecture
  5. Network Operations
  6. Cisco
  7. Network Analysis
  8. Network Management
  9. Hardware Firewalls
  10. Voice Over IP
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I'm trying to figure out VTP, I know what its for and  how it works. but the setup while I can get it to work I want to make sure that the setup that I am deploying it correct.


So I have a core …

49 views
Free Tool: Postgres Monitoring System
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One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Hi team,

I have inherited a network compromised of 4 Cisco 2950 and 2960 switches, 2 D-links and a netgear.

All switches have been pretty much thrown in and left with their basic configuration …

313 views

Hello,

A user that is connected to a switch on one of our floors is complaining about a slowdown issue on her laptop everyday around 5:00 PM. We've verified that no windows updates, program …

313 views

Hi guys,

We have some Watchguard access points which have been setup to talk to our VLAN (VLAN3, to be specific). These access points have to be connected to a PoE switch, which is a Draytek …

1821 views

Hello Experts,

I have been asked to create an account on my network equipment that will be used by a security appliance that our security team is putting in to check the equipment for …

319 views

Hi, Im trying to upgrade the IOS version of a 3560 series switch and want to know how to back up (just to be safe if the ios upgrade fails) and delete the old IOS image files to make space for the new…

79 views

New to environment.  Have a 2960S that noone seems to know the enable password to. So I hook console cable up and see password recovery is enabled so i run through the process from the switch:  …

410 views

I have a CIsco switch configured with 2 VLAN, 192.168.1.0 & 192.168.2.0

How can I configure the switch such that these two VLAN can access access a internet router connected to this switch as well …

819 views

If a London tube/metro train is setting from an below ground station and there is good wifi coverage and I'm in the last carriage, why is my iPhone not able to continue to receive data before it …

2294 views

Hello Experts,

I have a cisco switch - 3850 and it will have a connection to the internet,

I would like to configure this switch to be the main NTP device for the network. I would like this …

313 views
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One of a set of tools we're offering as a way to say thank you for being a part of the community.

Hello Experts,

can someone expert in networking please explain why I need IP pim sparse-mode on this svi? and what is the purpose of query interval and load interval?

Can I configure the SVI to…

121 views

Hello Experts,

I would like to see an example of a switch that is using IGMP snooping?

Thank you.

412 views

Hi guys

I've got a problem here. People keep getting disconnected from one of our fileserver with a Windows 2012R2 OS on it. It is connected to a cisco switch (not managed by us sadly). Our …

344 views

Can the experts explain what the term fabric means in the networking context? I did some research and Wikipedia said that  a "Switched Fabric or switching fabric is a network topology in which network…

131 views

Hi team,

Kindly suggest a script mechanism wherein I could configure schedule backups on ASA's and Nexus.
I am aware of kron policies that could be set on routers and L3 switches which I believe …

2491 views

Hello,

I've noticed lots of collisions and late collisions on our WAN interface of our Cisco ME 3400 switch.  Our ISP says that they've configured their interface to 100 full duplex.  The WAN …

1162 views

Dear Colleagues,
I have HP Aruba2530 switch installed at state hospital.
The problem is that SSH and WEB access is not secured by any password, all the settings are default whatsoever.
Plz help me…

537 views

I have a 2824 managed switch that my LAN is running on, access to WAN is through a firewall providing NAT and DHCP.  

I also have an NVR with a built-in POE switch, that has its own DHCP server for…

622 views

Hi
I am having 2 problems and I wanted to get your opinion before I call my cable company.

 1 - at least once a week I have to reset cable and my wifi switch.

 2 - I only seem to be getting about 13…

2030 views
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Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Hello Experts,

I’m having issues with one server (ServerM) communicating with another server(DC13) in the same subnet.  Here is a summary of my environment:
Subnet:  192.168.101.0/24
ServerM:  IP…

1088 views

Is it possible to limit traffic to a specific port on a Cisco switch? We have a printer attached, and we would like only traffic from specific workstation to be allowed to communicate with this …

1254 views

I have a Cisco L3 network switch in each building on site, 4 buildings in total.
There are Cisco L2 network switches connected to L3 as edge switches.

 In the server room I have 2 x Cisco L3 …

647 views

This, I hope, should be a very quick yes or no type of answer.

Can you have two VTP primary server switches connected to each other  (in this case two 3650's on separate floors of a building with …

526 views

I can NOT get my Cisco 2960 switch to respond to my Cisco 5510 ASA if I configure the 5510 using subinterfaces.  It works just fine when I set the IP address to the physical interface on the 5510.  …

1129 views

I have a switch that I would like to disable SNMP Write-Access for security.  Will this cause any problems with attached PCs or does this just disable reporting on events to the switch?
Thanks

628 views
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201506-LO-Top-001

Switches / Hubs

20K

Solutions

4

Articles & Videos

16K

Contributors

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Related Topics

  1. Routers
  2. Networking
  3. Networking Hardware-Other
  4. Network Architecture
  5. Network Operations
  6. Cisco