Which of the following devices and encapsulations are found at the data link layer? (Choose two.)
Which of the following devices and encapsulations are found at the data link layer? (Choose two.)
At the data link layer, frames are the units of data. They encapsulate packets and include control information such as MAC addresses and error detection codes. Switches also operate at the data link layer, making forwarding decisions based on MAC addresses.
The devices and encapsulations found at the data link layer are: B. Frame D. Switch
Frame and Switch are layer 2
A. Session - Layer 5 B. Frame - Layer 2 C. Firewall - Layer 3 D. Switch - Layer 2 E. Packet - Layer 3 F. Router - Layer 3
B. Frame: Frames are the units of data at the data link layer. They encapsulate packets and include control information such as MAC addresses and error detection codes. D. Switch: Switches operate at the data link layer and make forwarding decisions based on MAC addresses.