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Which of the following is the layer 2 protocol?
What is a Protocol?
| OSI Layer | Name | Common Protocols |
|---|---|---|
| 4 | Transport | TCP | SPX |
| 3 | Network | IP | IPX |
| 2 | Data Link | Ethernet |
| 1 | Physical |
How does layer 2 protocol work?
Layer 2 switching (or Data Link layer switching) is the process of using devices’ MAC addresses to decide where to forward frames. Switches and bridges are used for Layer 2 switching. They break up one large collision domain into multiple smaller ones. In a typical LAN, all hosts are connected to one central device.
Which device can process layer 2 information?
A layer 2 network device is a multiport device that uses hardware addresses, MAC address, to process and forward data at the data link layer (layer 2). A switch operating as a network bridge may interconnect otherwise separate layer 2 networks. The bridge learns the MAC address of each connected device.
What is layer 2 addressing?
The layer 2 address is a physical address. It pertains to the actual hardware interface (NIC) in the computer. A computer can have any number of layer 3 addresses but it will only have 1 layer 2 address per LAN interface. At layer 3, the data is addressed to the host that the data is destined for.
Is DNS a Layer 2 or 3?
DNS is a application layer protocol, because DNS query and answer is the application level communications. Application layer only understand the query and answer section in the DNS packet. so application layer DNS query/answer is encapsulated in layer 4 udp then layer 3 IP…..and so on.
What is the function of a layer 2 protocol?
Spanning-tree is a layer 2 protocol developed to avoid any layer 2 loops in the network when you have different paths to one or more destination. The basic function of Spanning-tree is to prevent bridge loops allowing a network to have redundant links and failover paths to a single destination.
What can you do with Layer 2 network?
Here’s what you can do with Layer 2: There are several Layer 2 protocols used during the engine scan. These include: SNMP: Simple Network Management Protocol is used for collecting information from devices and configuring them.
What does a layer 2 device look for?
When an Ethernet frame arrives at a Layer 2 device, the Layer 2 device will inspect the destination MAC address of the frame and look to its FDB table for information on where to send that specific Ethernet frame. Your Layer 2 data will only be as good as your network configuration.
When to use layer 2 or Layer 3 routing?
For now, network managers should plan on MSTP for at least the next five years. While Layer 2 protocols such as STP operate within a LAN environment, routing between subnets requires Layer 3 dynamic routing to minimize management costs and maximize network uptime.