Layer 2 Data Link Flashcards
What link is responsible for transferring data between nodes on the same logical segment?
Layer 2-Data Link Layer
What is a segment at the data link layer?
Where all nodes can send traffic to one another using hardware adresses.
What is the term for a layer 2 segment that includes multiple physical segments?
A logical topology.
At the data link layer, what function does the central node provide?
A forwarding function
What are the addresses of interfaces within the same layer 2 segment?
Local or hardware addresses
What are nodes called that send and receive info?
End systems or host nodes
What is a node called that provides only a forwarding function?
An intermediate system or infrastructure node
What is the definition of a frame?
Structured units organized from the stream of bits arriving from the physical layer.
What control information does the data link layer add to the data payload?
Header fields
What are included in the header fields?
Source/destination hardware addresses. A basic error check.
What devices operate at the data link layer?
Network adapters, bridges, switches, wireless access points
What does NIC stand for?
Network interface card
What device joins an end system host to network media, enabling it to communicate over the network by assembling and disassembling frames?
An NIC
What intermediate system joinss physical network segments?
A bridge
What bridge has many ports and creates links between large numbers of nodes?
A switch
