Ethernet
Ethernet is not a single protocol but an entire collection of different standards. These standards come from the IEEE and all of them start with 802.3 in their name. Ethernet is also pretty old, the first memo about Ethernet was written by Bob Metcalfe back in 1973.
Ethernet "lives" in the Physical and Data Link layers of the OSI Model. At the physical layer, Ethernet uses two types of media: copper and optical fiber.
Some additional information about Ethernet can be found in the following notes:
Links:
https://networklessons.com/cisco/ccna-routing-switching-icnd1-100-105/introduction-to-ethernet
Links to this page:
- ARP - Message Header and Payload
- ARP table
- Broadcast MAC address
- Career study advice
- DHCP - Client ID
- DHCP - Using the MAC as the client ID on a Cisco device
- EtherChannel - prerequisites for bundling
- Ethernet - role of FCS field
- Ethernet - speed and duplex mismatches
- Ethernet CSMA-CD
- Ethernet VPN (EVPN)
- Ethernet frame types
- Ethernet header
- Ethernet over IP (EoIP)
- GRE
- IEEE
- Interface - no carrier counter
- Interface - show interfaces counters explained
- Interface speed and bandwidth
- L2TPv3
- MAC Access List EtherType
- MAC Access List
- MAC address table - show command on Nexus device
- MAC address table populated using source address field
- MAC address
- MPLS - Ethernet over MPLS (EoMPLS)
- MPLS - Layer 2 VPNs
- MPLS
- MTU - Adjusting MTU to accommodate additional headers
- MTU - Path MTU Discovery (PMTUD)
- MTU - default interface MTU
- MTU
- Media Access Control (MAC)
- MetroEthernet - VLAN design considerations
- MetroEthernet - Virtual Private LAN service
- MetroEthernet - Virtual Private Wire Service
- MetroEthernet
- Network - Example of communication, encapsulation, and decapsulation, between hosts
- Network - Flapping
- Network - Layer 2 network
- Network - broadcast domain
- OSPF - DR-BDR election priority of zero
- OSPF DR BDR election and neighbor adjacencies
- OSPF immediate hello packet
- OSPF network types
- OSPF point to point network type for Ethernet
- PBR - set interface command
- PPPoE
- PTP - Precision Time Protocol
- Physical layer - Copper medium
- Physical layer - carrier wave
- Physical layer - encoding
- PoE - Understanding Maximum Power
- PoE Passive
- PoE Standards-based
- PoE over Gigabit Ethernet
- PoE power sourcing equipment (PSE)
- PoE powered device (PD)
- PoE what is it
- Protocol Data Unit (PDU)
- QoS - CoS to DSCP and DSCP to CoS mapping
- Routing - l2transport
- STP - Shortest Path Bridging (SPB)
- STP Topology Change Timer
- STP changing link cost
- Security - spoofing
- Serial Interface default broadcast address
- Switch high availability options
- Switching - Media Access Control (MAC) addresses
- Switchport - IEEE 802.1q
- Switchport - ISL
- Switchport access
- Switchport trunk
- TCP - factors affecting segment size
- UDP - Maximum Datagram Size
- VLAN Tag
- VXLAN access trunk port
- Virtual Private LAN Service (VPLS)
- WAN - edge equipment names and terminology