Purpose
This OSI layer number prepares data for the physical network.
What is Layer 2?
This topology connects each node to a central device.
What is a star topology?
Ethernet LANs use this contention-based method.
What is CSMA/CD?
This part of a frame contains addressing and control info at the start.
What is the header?
Name one Layer 2 protocol used in local or wide area networks.
What is Ethernet / 802.11 Wireless / PPP / HDLC / Frame Relay?
Without this layer, IP wouWithout this layer, IP would have to connect directly to every type of media. ld have to connect directly to every type of media.
What is the Data Link Layer?
This logical topology connects two nodes directly.
What is point-to-point?
WLANs use this contention-based method.
What is CSMA/CA?
These are the three basic parts of a frame.
What are header, data, and trailer?
This organization defines many LAN/MAN standards, including 802.3.
What is IEEE?
This sublayer handles frame delimiting, addressing, and error detection.
What is the MAC (Media Access Control) sublayer?
This topology type includes hub-and-spoke and mesh.
What is a logical topology?
In this type of duplex, devices can send and receive at the same time.
What is full-duplex?
This Layer 2 address is only used for local delivery.
What is the MAC address?
These four organizations define network access layer standards.
What are IEEE, ITU, ISO, and ANSI?