IDT6.4

Powerpoint samenvatting

Data Link Layer

Data Link Layer

controls how data is sent and received over the network.

What is encapsulation in the context of the Data Link Layer?

the process of taking Layer 3 packets, such as IPv4 or IPv6, and adding Layer 2 frame headers for transmission.

What are the sublayers of the Data Link Layer?

LLC sublayer and MAC sublayer.

What does the MAC sublayer do?

controls the NIC and manages the sending/receiving of data on wired or wireless networks.

What is a node?

A device that can receive, create, store, or forward data along a communication path.

Bv: computers, printers, routers, and switches.

What types of transmissions occur at the Data Link Layer?

unicast, multicast, and broadcast.

What is a MAC address?

physical address that uniquely identifies each device on a network.

What is flow control in the Data Link Layer?

a technique that regulates data transmission between two stations at different speeds to prevent overwhelming the slower receiver.

What are the two methods for flow control?

Stop-and-Wait and Sliding Window.

What is an ARP request?

broadcast sent by a device to determine the MAC address associated with a specific IPv4 address when it's not available in its ARP table.

What are the functions of ARP?

ARP's functions include resolving IPv4 addresses to MAC addresses and maintaining a table of IPv4 to MAC address mappings.

What happens if a NIC receives a frame that does not match its MAC address?

If the NIC receives an Ethernet frame and the destination MAC address does not match its own, the device discards the frame.

What is the purpose of the Start Frame of Preamble?

The Start Frame of Preamble is used for synchronization between sending and receiving devices, signaling them to prepare for a new frame.

What is the role of the MAC-address table?

helps Ethernet switches determine how to forward traffic by mapping each port to a MAC address.

Explain the function of error detecting codes in Data Link Layer communication.

Error detecting codes are additional data added to a digital message to identify if errors have occurred during transmission.

What is Line Discipline in the Data Link Layer?

Line Discipline is the coordination method among device links determining which device can send data and when.