Table of Contents
- 1 What is the data called at layer 2?
- 2 What are the two groupings of layers?
- 3 Which of the following is a Layer 2 protocol?
- 4 Which type of addressing is found at the OSI layer 2?
- 5 What is Layer 2 configuration?
- 6 What is Layer 2 interface?
- 7 What is the meaning of Layer 2 networking?
- 8 Which is a sub layer of the data link layer?
What is the data called at layer 2?
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between nodes on a network segment across the physical layer.
What are the two groupings of layers?
Figure 11: OSI Reference Model Layers To help illustrate the differing levels of abstraction between layers near the top and those on the bottom, they are sometimes divided into two layer groupings—the lower layers and the upper layers.
What is a layer 2 segment?
Layer 2 segmentation refers to VLANs, or Bridges that connect different Layer 2 (data link layer of the OSI reference model) segments. nTier references within Cisco speak – i.e. Core layer, Access layer, Distribution/Aggregation layer are informal and have no direct association to the OSI reference model at all.
What is layer 2 device in networking?
The term layer 2 refers to the data link layer in the conceptual Open Systems Interconnection (OSI) data communication model. A layer 2 device on a computing network will transmit data to a destination according to Media Access Control (MAC) addresses, also known as Ethernet addresses.
Which of the following is a Layer 2 protocol?
Network Layer 2 protocols. LLDP is vendor neutral, and is commonly used as a component in network management and network monitoring applications. CDP is a Cisco proprietary protocol that support the IEEE 802.1ab version of LLDP, and is primarily used to share information between directly connected Cisco devices.
Which type of addressing is found at the OSI layer 2?
physical addressing
Layer 2 (Data Link) receives packets from Layer 3. Whereas Layer 4 performs logical addressing (IPv4, IPv6), Layer 2 performs physical addressing. It adds sender and receiver MAC addresses to the data packet to form a data unit called a frame.
What layer are segments used?
In data communications networks, packet segmentation is the process of dividing a data packet into smaller units for transmission over the network. Packet segmentation happens at layer four of the OSI model; the transport layer.
Which layer is represented by packets?
In the seven-layer OSI model of computer networking, packet strictly refers to a protocol data unit at layer 3, the network layer.
What is Layer 2 configuration?
You can configure Layer 2 switching ports as access or trunk ports. Trunks carry the traffic of multiple VLANs over a single link and allow you to extend VLANs across an entire network. All Layer 2 switching ports maintain MAC address tables.
What is Layer 2 interface?
Devices are connected to a Layer 2 segment; the firewall forwards the frames to the proper port, which is associated with the MAC address identified in the frame. …
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.
What is smallest unit bit of Layer 2 protocol?
The smallest unit bit of a Layer 2 protocol is called an Ethernet frame, or simply frames, and is different from bits since frames can be used to detect any in-transit data corruption. Depending on how a frame is transferred, it can be categorized as: Unicast – between two individual nodes Multicast – one node to multiple nodes
What is the meaning of Layer 2 networking?
Overview of Layer 2 Networking Layer 2, also known as the Data Link Layer, is the second level in the seven-layer OSI reference model for network protocol design. Layer 2 is equivalent to the link layer (the lowest layer) in the TCP/IP network model.
Which is a sub layer of the data link layer?
The logical link control (LLC) sub layer of the data link layer manages communications between devices by controlling frame synchronization, flow control, and error checking. The media access control (MAC) sub layer of the data link layer manages protocol access to the physical network medium.
How are frames transmitted in a layer 2 network?
A frame is a protocol data unit, the smallest unit of bits on a Layer 2 network. Frames are transmitted to and received from devices on the same local area network (LAN).