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What do bridges and switches use to make data forwarding decision?
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What are Data Link Layer Devices?
bridges, Switches and NIC..
Switch work in which layer of osi model?
Switches / Bridges and hubs work at data link layer, but there are layer three switches which operate at network layer. Dhruv
Discuss the differences between hubs repeaters bridges and switches?
A repeater amplifies a signal. It will also re-send the signal as a "clean" signal. A hub is a multiport repeater. It will send a signal it receives out, through all of its ports - except the port where it received the signal. Bridges and switches are more intelligent, in that they send data only to the destination - according to the MAC address. Bridges and switches are similar, but switches have more hardware optimization, allowing for fast switching of large volumes of data.
How are layer 2 switches similar to layer 3 switches?
A layer 2 switch at it's core only forwards data within a LAN and only deals with MAC addresses. A layer 3 switch has the capability of forwarding frames and packets because it understands IP addresses.
What is the difference among different types of switching devices in networking?
Switches are data link layer devices that, like bridges, enable multiple physical LAN segments to be interconnected into a single larger network. Similar to bridges, switches forward and flood traffic based on MAC addresses. Any network device will create some latency. Switches can use different forwarding techniques-two of these are store-and-forward switching and cut-through switching. In store-and-forward switching, an entire frame must be received before it is forwarded. This means that the latency through the switch is relative to the frame size-the larger the frame size, the longer the delay through the switch. Cut-through switching allows the switch to begin forwarding the frame when enough of the frame is received to make a forwarding decision. This reduces the latency through the switch. Store-and-forward switching gives the switch the opportunity to evaluate the frame for errors before forwarding it. This capability to not forward frames containing errors is one of the advantages of switches over hubs. Cut-through switching does not offer this advantage, so the switch might forward frames containing errors. Many types of switches exist, including ATM switches, LAN switches, and various types of WAN switches. Asynchronous Transfer Mode (ATM) switches provide high-speed switching and scalable bandwidths in the workgroup, the enterprise network backbone, and the wide area. ATM switches support voice, video, and data applications, and are designed to switch fixed-size information units called cells, which are used in ATM communications. Figure 4-3 illustrates an enterprise network comprised of multiple LANs interconnected across an ATM backbone. Figure 4-3 Multi-LAN Networks Can Use an ATM-Based Backbone When Switching Cells LAN switches are used to interconnect multiple LAN segments. LAN switching provides dedicated, collision-free communication between network devices, with support for multiple simultaneous conversations. LAN switches are designed to switch data frames at high speeds. Figure 4-4 illustrates a simple network in which a LAN switch interconnects a 10-Mbps and a 100-Mbps Ethernet LAN. Figure 4-4 A LAN Switch Can Link 10-Mbps and 100-Mbps Ethernet Segments there is no figures as noted above
What is dynamically selected by the source host when forwarding data?
Source Port
Which basic process is used to select the best path for forwarding data?
hz
Sophisticated networks generally use which of the following hardware devices to ease the flow of data packets throughout the network?
Modern networks used two devices for the data packets within the network will flow easily. The two devices are the routers and switches.
What can bridges do that hubs and repeaters cannot do?
Bridges send information (data) to the specified destination, whereas hubs and repeaters do not.
How was data entered in computers in 1945?
In 1945, data was entered into computers via a series of switches.[1]
Which of the following are used by dual homed firewalls to enable application data to cross the firewall?
application forwarding agents
What is the purpose in a network switch?
Switches connect multiple devices on a network, similar to a hub, but with one difference. Switches have the ability to "remember" which device is connected to which switch-port - and only retransmit to switch-port connecting the destination-device for which the data is intended, thereby creating multiple collision domains (which is good - less chance for lost data). In contrast, a hub simply retransmits the data to EVERY interface on it, creating one huge collision domain.
