Module 7 CCNA

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Ethernet Frame

Structure containing source and destination MAC addresses.

Ethernet

Networking technology defined in IEEE 802 standards.

Data Link Layer

Layer responsible for node-to-node data transfer.

LLC Sublayer

Identifies network layer protocol in Ethernet frames.

MAC Sublayer

Handles data encapsulation and media access control.

Data Encapsulation

Process of wrapping data in an Ethernet frame.

Frame Check Sequence (FCS)

Trailer used for error detection in Ethernet frames.

Full-Duplex

Simultaneous two-way data transmission in Ethernet.

Half-Duplex

One-way data transmission at a time in Ethernet.

CSMA/CD

Carrier Sense Multiple Access with Collision Detection.

Collision Fragment

Frame less than 64 bytes

Jumbo Frame

Frame larger than 1500 bytes

Ethernet MAC Address

Unique 48-bit address for Ethernet devices.

Organizationally Unique Identifier (OUI)

24-bit code ensuring MAC address uniqueness.

Unicast MAC Address

Address for one-to-one frame transmission.

Broadcast MAC Address

FF-FF-FF-FF-FF-FF

Multicast MAC Address (01-00-5E)

Address for group communication in Ethernet.

MAC Address Table

Stores MAC addresses for forwarding decisions.

Content Addressable Memory (CAM)

Another name for the MAC address table.

Source MAC Address

Address used to learn and update MAC table.

Destination MAC Address

Address indicating the intended recipient of a frame.

Ethernet NIC

Network interface card for Ethernet connectivity.

Ethernet Frame Size

Minimum 64 bytes

Ethernet Switch

Device that forwards frames based on MAC addresses.

Frame Processing

Examining MAC addresses for frame acceptance.

Neighbor Discovery (ND)

Determines MAC address for IPv6 addresses.

Address Resolution Protocol (ARP)

Determines MAC address for IPv4 addresses.

Ethernet Standards

Defined by IEEE 802.3 for various media types.

Unicast Address

A unique destination address that identifies a single recipient for data transmission.

Unknown Unicast

A situation where the destination MAC address is not found in the MAC address table

Broadcast Address

An address that allows a frame to be sent to all devices on a network.

Multicast Address

An address that allows a frame to be sent to a specific group of devices on a network.

Store-and-Forward Switching

A frame forwarding method that receives the entire frame, computes the CRC, and forwards it only if the CRC is valid.