Data Link Layer Quiz

Data Link Layer

• The main role of the Data Link layer is to provide error-free transfer of data frames between two devices on the same network.
• The Data Link layer is represented by the acronym OSI 2.
• The Data Link LLC (Logical Link Control) layer is responsible for identifying and managing network connections, as well as providing flow control and error detection.

TCP/IP Model

• The Data Link layer is the second layer of the TCP/IP model.

Identification of Applications

• The Data Link layer uses port numbers to identify running applications.

LLC Function

• The main function of the LLC (Logical Link Control) layer is to manage network connections, provide flow control, and detect errors.

MAC Component

• The primary role of the Media Access Control (MAC) component of the Data Link Layer is to manage access to the network channel, resolving collisions, and providing address recognition.

Routers and Network Cards

• Routers require at least 2 network cards to connect multiple networks and forward data between them.

MAC Address

• A MAC address consists of 48 bits.
• A MAC address is composed of two parts: the Organizationally Unique Identifier (OUI) and the Network Interface Controller (NIC) specific value.

Windows Command

• The getmac command in Windows displays the MAC address of a computer's Ethernet network interface card.