After making configuration changes on a cisco switch
- After making configuration changes on a cisco switch full#
- After making configuration changes on a cisco switch code#
- After making configuration changes on a cisco switch mac#
After making configuration changes on a cisco switch mac#
After making configuration changes on a cisco switch full#
Full duplexįull duplex communication provides for bidirectional flow of data. While using the half duplex communication, the likelihood of collisions is high, therefore, CSCMA/CD is used to minimize them. This type of communication can be likened to using a walkie-talkie where you can either talk or listen but not both. When HUBs were common in networks this was the communication that was used. In this type of communication, transmission of data is only one way, this means a device can either send or receive frames and not both. On Ethernet networks, there are two modes of operation the duplex determines whether the communication is unidirectional or bidirectional. The entire MAC address is usually hard coded to the hardware of the switch and cannot change. It uniquely identifies the device hardware. The next 24 bits are usually a number that is assigned by the vendor for that particular device. In CISCO switches for example, the OUI is usually: 0009.7C
After making configuration changes on a cisco switch code#
It is usually the code that has been assigned by the IEEE to a particular vendor. The OUI consists of the first 24 bits of the MAC address.
![after making configuration changes on a cisco switch after making configuration changes on a cisco switch](https://community.cisco.com/legacyfs/online/media/20151006_144253_2.jpg)
the Organizational Unique Identifier (OUI).When we were looking at layer 3 addressing, we said that IP address consist of two parts, the network and the host segment, similarly the MAC address is also broken up into two parts. The address itself is made up of 48 bits which are represented in hexadecimal numbers. MAC addressĪs we have mentioned, the MAC address is the address that is used in the Ethernet. This includes adding information such as the source and destination MAC address. When packets are received from the network layer, they are encapsulated into frames. This is the address that is used to communicate frames. In the Ethernet, the type of addressing used is the physical address which is typically the MAC address. This communication is also useful if the message being communicated is meant for a large audience.
![after making configuration changes on a cisco switch after making configuration changes on a cisco switch](https://www.lookingpoint.com/hs-fs/hubfs/image-121.png)
In this case, a frame is usually sent to all the devices on the same LAN. In case a user node needs certain information and it does not know who has the specific information, it may use broadcast type of communication. In this case, multicast messages will be sent. In a teleconferencing call for example, a user may need to communicate with three other users simultaneously. The type of protocol in use can typically determine whether multicast is used. In multicast communication, the sender usually transmits a frame to a group of nodes on the Ethernet segment. In modern LANs, this is the most common form of communication especially on the internet using protocols such as HTTP, Telnet and others. This means that the sender and the recipient as well as the switch in the middle must know about one another. In this mode, there is only one sender and one recipient.
![after making configuration changes on a cisco switch after making configuration changes on a cisco switch](https://support.yubico.com/hc/article_attachments/360018949480/1.png)
With unicast communication, a frame is usually sent from one node to a specific destination. In Ethernet communication, we have three types of ways in which messages are transmitted. With hubs, only one device could transmit at a time, however, with switches, multiple devices can use the media at the same time. In this type of communications, devices on the same Ethernet segment usually listen to the network media to determine if they can transmit or whether they have to wait.
![after making configuration changes on a cisco switch after making configuration changes on a cisco switch](http://i.ytimg.com/vi/4ZLW6wlG6wA/hqdefault.jpg)
We discussed the CSMA/CD in the chapter on Ethernet, we said that the LAN networks operate using several rules. We will conclude with the basic configuration of a switch and this will lead us into the discussion on VLANs. We will discuss the switch’s operation, layer 2 and layer 3 switching as well as other concepts. In this chapter, we will explore switching concepts and the basic configuration of a switch.