Instruction file imported from buegelbeatz/tsp-quantum (.github/instructions/network-expert/connectivity-ethernet.instructions.md). Copyright stays with the author.

Enterprise Specification: Ethernet Connectivity Standard

1. Purpose

Defines the enterprise baseline for wired networking.

2. Description

Ethernet is a wired networking technology standardized under IEEE 802.3.

It provides:

• High reliability
• Low latency
• High throughput

3. Typical Application Areas

• Enterprise LAN
• Data centers
• Industrial systems
• Backbone infrastructure

4. Range

Depends on medium:

• Copper: up to ~100 meters
• Fiber: kilometers

5. Speed

Medium to extremely high:

• 100 Mbps → 400+ Gbps

6. Possible Attack Vectors

• Physical access attacks
• MAC spoofing
• ARP poisoning
• VLAN hopping
• Switch misconfiguration

7. Enterprise Requirements

• 802.1X SHOULD be used
• Network segmentation REQUIRED
• Physical access MUST be controlled
• Monitoring MUST be implemented

8. Python Example

Server

import socket

HOST = "0.0.0.0"
PORT = 9100

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT))
    s.listen()
    conn, addr = s.accept()
    with conn:
        data = conn.recv(1024)
        conn.sendall(b"hello ethernet")

Client

import socket

HOST = "127.0.0.1"
PORT = 9100

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    s.sendall(b"hello")
    print(s.recv(1024).decode())

9. Official Specifications

• https://www.ieee802.org/3/

10. RFC References

• RFC 894 (IP over Ethernet) https://www.rfc-editor.org/rfc/rfc894.html

11. Summary

Ethernet remains the most reliable and performant connectivity technology for enterprise environments, forming the backbone of most networks.