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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Hi,

I have two spare HP ProCurve 5406zl Switches.

Do they have the capability to be stacked?

911 views
Portable, direct connect server access
Portable, direct connect server access

The ATEN CV211 connects a laptop directly to any server allowing you instant access to perform data maintenance and local operations, for quick troubleshooting, updating, service and repair.

I have a traditional telephone system - PBX, analog lines, phone provider.  We have no need internally for many of the features that a full VOIP system offers - people are very happy with the phones …

2363 views

Hi,

I have difficulty understanding NICs and Switches in VMware.
At client's sites I often see more than one NIC connected to a single virtual switch.  These are then connected to one single …

936 views

Good Morning all you Cisco superheroes!!

I am having a problem between switches (closets-to-closet), and need some help because I am beside myself trying to figure this out. Here is the rundown of …

711 views
ATEN / Arrow Electronics Case Study
Arrow Electronics was searching for a KVM (Keyboard/Video/Mouse) switch that could display on one single monitor the current status of all units being tested on the rack.
016 views

I am connecting a cable from a cisco catalyst 3560 switch to a Cisco SG200 Gigabit switch
The port on the catalyst is amber but blinking like there is traffic .
The port on the SG-200 is green

1545 views

Hey Guys,

I ran out of IP addresses, it seems our WLAN and Phones are using up a lot of IPs. We have some dummy Cisco SG200 switches in the environment (about 3). Now i got a layer 3 (Cisco 3750x) …

1237 views

I am working on a network that consists mainly of 2 stacks of 6 Dell PowerConnect 6224 switches. There are also a few other independent 6224's that connect to the stacks via CAT6 cable. I know when …

1032 views

What's the easiest way to temporarily disable sflow on a Cisco nexus 9k?

313 views

I need to install a WS-X4712-SFP+E line card in an online 4507 chasis, can this be done, or does it need to be offline.

thanks
Wilson

225 views
Building an interactive eFuture classroom
Building an interactive eFuture classroom

Watch and learn how ATEN provided a total control system solution including seamless switching matrix switch, HDBaseT extenders, PDU, lighting control to build an interactive eFuture classroom.

i have an older 3560 switch that I am planning to test a RADIUS solution on.  I configured the device with VLAN 1 and an IP address.  Int fa0/8 is connected and in VLAN 1.
I get the following errors:…

932 views

Hello friends!
I am trying to configure Voice QoS on my Switch 3Com 5500 G, and I don't know what to do.

Can anyone help me?


Alexandre Santana

525 views

If a port is configured with auto qos and has the command mls qos trust cos, but doesn't have a voice vlan meaning that the data and voice share the same subnet, does the ethernet frame still have a …

119 views

Hi Experts!

I am setting a new VoIP infrastructure and in the process deploying new firewalls and switches. I would like to utilize vlans to logically separate the voice and data but most of our …

255 views

Please provide me with the instructions on how to reset a ZyXEL GS110-8HP-240W POE switch back to the factory default settings.

We need to make sure that any configurations or special programming …

328 views

Please provide me with the instructions on how to reset an HP V1905-24-PoE switch to its factory default settings.

I need to make sure that any custom configurations are discarded.

236 views

I have a network that appears not to be passing one vlan.  This is quite an odd situation.  I have a stack of switches that are made up of Cisco SGE 2000 24 and 48 port units.  My router and where all…

2439 views

I have SSH enabled on switches and routers.

If I am already in a router how can I login to a switch from my router.?

Two ways I would like to know.

1. Login from a router to a switch.

222 views

Hi Experts,

Recently been on a CCNA course and apparently I ask waaay to many questions, so I have been given a "fun task" at work. We have quite a few switches, some of them have telnet enabled …

340 views
Free Tool: Port Scanner
Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

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.

I am using " Password Recovery Procedure for the Cisco Catalyst Fixed Configuration Layer 2 and Layer 3 Switches"
And after I reset the username and password, then go into config t - all of the …

834 views

I have an entry for my domain(domain.com) in DNS like:

(Same as Parent folder) Host(A) 10.10.10.10 Static and FQDN is only my domain.com, i am not sure why do we have this. no host connected with …

737 views

I have setup my username and password on a Cisco 2950 switch for security. My computer is connected to the switch with a console cable.
When I restart my switch I get prompted for the enable password…

428 views

I am attempting to reset the password on a Cisco 3560 switch, And I am following the steps in the "Password Recovery Procedure for the Cisco Catalyst Fixed Configuration Layer 2 and Layer 3 Switches" …

228 views

I just upgraded a stack of 3850s to 3.7.4.  After rebooting, the ten gig port (te1/1/4) in the first member of the stack is flashing amber.  I look through the logs and found this error:

"Warning: …

1551 views

We have a Cisco 3560G Switch - connected is 6 PC's, 6 ShoreTel IP phones, a Server and 2 Gateways; Sonicwall Router for Data and Frontier DSL modem/Router for Voice.  I want the phones and PC's to …

240 views
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Switches / Hubs

20K

Solutions

5

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