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MAC address

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Efficient Ops
Efficient Ops
Dec 15, 2024 · Fundamentals

Unlocking Network Basics: How VLANs, Routers, and DNS Shape Modern LANs

This article explains the fundamentals of VLANs, single‑arm routing, layer‑3 switches, gateways, DNS, MAC addresses, and subnet masks, using clear analogies and examples to show how network segmentation and routing enable efficient communication within and between local networks.

DNSMAC addressVLAN
0 likes · 11 min read
Unlocking Network Basics: How VLANs, Routers, and DNS Shape Modern LANs
Top Architecture Tech Stack
Top Architecture Tech Stack
Sep 9, 2024 · Information Security

A Developer’s Hidden Backdoor: MAC Address Modification Blocked by Intentional Code

The article recounts a real‑world incident where a device’s MAC address could not be changed because a previous engineer deliberately disabled the relevant function, discusses the discovery of the backdoor code, and examines the legal and ethical implications of such intentional vulnerabilities.

Code ReviewLinux kernelMAC address
0 likes · 4 min read
A Developer’s Hidden Backdoor: MAC Address Modification Blocked by Intentional Code
Efficient Ops
Efficient Ops
Sep 18, 2023 · Fundamentals

Understanding VLANs, Routing, and Core Network Concepts: A Beginner’s Guide

This article explains VLAN fundamentals, how single‑arm routing and layer‑3 switches enable inter‑VLAN communication, the role of gateways, DNS resolution, MAC addresses, and subnet masks, using clear analogies and diagrams to help readers grasp essential networking concepts.

DNSMAC addressVLAN
0 likes · 11 min read
Understanding VLANs, Routing, and Core Network Concepts: A Beginner’s Guide
Efficient Ops
Efficient Ops
Aug 14, 2022 · Fundamentals

Why VLANs Matter: Simplifying Networks with Virtual LANs, Gateways, and DNS

This article explains the concept of VLANs, how they segment broadcast domains like classroom groups, describes single‑arm routing and layer‑3 switches for inter‑VLAN communication, and covers essential networking components such as gateways, DNS, MAC addresses, IP addressing, and subnet masks, illustrating each with clear analogies.

DNSMAC addressNetworking
0 likes · 12 min read
Why VLANs Matter: Simplifying Networks with Virtual LANs, Gateways, and DNS
Efficient Ops
Efficient Ops
May 9, 2022 · Fundamentals

Why VLANs Matter: Simplifying Networks with Virtual LANs, Gateways, and DNS

This article explains the concept of VLANs, illustrates how they segment networks like classroom groups, describes single‑arm routing and layer‑3 switches for inter‑VLAN communication, and covers related fundamentals such as gateways, DNS, MAC addresses, and subnet masks, providing clear analogies and diagrams for beginners.

DNSMAC addressNetworking
0 likes · 12 min read
Why VLANs Matter: Simplifying Networks with Virtual LANs, Gateways, and DNS
IT Services Circle
IT Services Circle
Feb 23, 2022 · Fundamentals

Understanding MAC Addresses, Switches, Routers, and Subnetting in Network Layers

This article explains how computers communicate over networks by introducing MAC addresses, the role of hubs and switches, the function of routers, IP addressing, subnet masks, ARP, and routing tables, illustrating the process of data transmission across different network layers.

ARPIPMAC address
0 likes · 19 min read
Understanding MAC Addresses, Switches, Routers, and Subnetting in Network Layers
Refining Core Development Skills
Refining Core Development Skills
Mar 6, 2021 · Fundamentals

Understanding MAC Addresses, IP Addresses, Subnets, Switches, and Routers in Network Layers

This article explains how computers use MAC and IP addresses, subnet masks, ARP, hubs, switches, and routers to communicate across physical, data‑link, and network layers, illustrating the learning process with step‑by‑step examples and tables of address mappings.

ARPIP addressMAC address
0 likes · 19 min read
Understanding MAC Addresses, IP Addresses, Subnets, Switches, and Routers in Network Layers
php中文网 Courses
php中文网 Courses
Feb 24, 2021 · Fundamentals

Understanding IP Addresses, CIDR, and MAC Addresses

This article explains how to view a machine's IP address on Windows and Linux, describes the structure and classification of IPv4 addresses, introduces CIDR subnetting, distinguishes public and private IP ranges, and clarifies the role and format of MAC addresses.

CIDRIP addressLinux
0 likes · 9 min read
Understanding IP Addresses, CIDR, and MAC Addresses
Practical DevOps Architecture
Practical DevOps Architecture
Nov 10, 2020 · Information Security

Restricting Internet Access for Specific Hosts Using MAC‑Based ACL on a Router

This guide explains how to configure a router to block selected LAN hosts from accessing the Internet by applying source‑MAC‑address based ACLs while still permitting those hosts to reach the gateway, using VLAN, traffic classifiers, and traffic policies.

ACLMAC addressRouter
0 likes · 5 min read
Restricting Internet Access for Specific Hosts Using MAC‑Based ACL on a Router
Sohu Tech Products
Sohu Tech Products
Jul 22, 2020 · Fundamentals

Understanding MAC Addresses: Structure, Allocation, Modification, and LAN Communication

This article explains the 48‑bit MAC address format, IEEE allocation rules, address block sizes, how to modify MAC addresses on Linux and macOS, and the role of MAC addresses in Ethernet frames, ARP, and LAN communication, highlighting practical considerations and limitations.

ARPEthernetLAN
0 likes · 10 min read
Understanding MAC Addresses: Structure, Allocation, Modification, and LAN Communication
DevOps Cloud Academy
DevOps Cloud Academy
Aug 9, 2019 · Fundamentals

Fundamentals of Switches and Ethernet Frame Structure

This article explains the basic concepts of network switches, including data link layer functions, MAC address structure, unicast and multicast addressing, Ethernet II frame composition, common switch models, and the forwarding principles illustrated with diagrams.

EthernetMAC addressdata link layer
0 likes · 3 min read
Fundamentals of Switches and Ethernet Frame Structure
Java Captain
Java Captain
Mar 4, 2019 · Fundamentals

Understanding the OSI 5‑Layer Model: How Computers Locate and Communicate with Each Other

This article explains, in plain language, how the five‑layer OSI model enables two distant computers to discover each other, establish a connection, and reliably exchange data by detailing the roles of the physical, data‑link, network, transport, and application layers.

IP addressingMAC addressOSI model
0 likes · 12 min read
Understanding the OSI 5‑Layer Model: How Computers Locate and Communicate with Each Other