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-200-301/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
- EIGRP - Hello interval and Hold time
- EIGRP - Static neighbors over any L2 technology
- EtherChannel - prerequisites for bundling
- Ethernet - Pause Frames
- 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
- Layer 2 network
- 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 - Interface MTU vs IP MTU
- MTU - Path MTU Discovery (PMTUD)
- MTU - Understanding L2 MTU and Frame Handling in Network Switches
- MTU - default interface MTU
- MTU
- Media Access Control (MAC)
- MetroEthernet - VLAN design considerations
- MetroEthernet - Virtual Private LAN service
- MetroEthernet - Virtual Private Wire Service
- MetroEthernet
- Multicast Dense Mode Prune Message Behavior on Shared Media
- Network - BUM Traffic
- Network - Example of communication, encapsulation, and decapsulation, between hosts
- Network Flapping
- Network Speed, Bandwidth, and Throughput
- Networking - Understanding Chassis devices
- OSPF - DR-BDR election priority of zero
- OSPF DR BDR election and neighbor adjacencies
- OSPF Network Type in VXLAN the Underlay
- OSPF immediate hello packet
- OSPF network types
- OSPF point to point network type for Ethernet
- PBR - set interface command
- PPPoE
- Physical layer - Copper medium
- Physical layer - encoding
- Physical layer Carrier Wave
- 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 - BPDUs, VLAN IDs, and PVST+
- 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 - QinQ troubleshooting
- VLAN Tag
- VXLAN VTEP
- VXLAN access trunk port
- Virtual Private LAN Service (VPLS)
- WAN - edge equipment names and terminology