This post is an introduction to computer networks. Computer Network Devices Computer network devices includes switch, routers or firewalls. You can read this post about computer network devices. Area Networks Examples of area networks are WAN or LAN. You can…
This post is an introduction to network firewalls (FW). Firewalls should be complemented with other controls like antivirus scanners, data loss prevention (DLP) solutions and intrusion detection system (IDS) tools. Types of Firewall Firewall classification criteria: Types of Firewall by…
This post summarizes Authentication, Authorization and Accountability (AAA) protocols or AAA network protocols. Do not confuse the AAA protocols with the authentication protocols like EAP, CHAP and PAP. Authentication protocols works in the OSI layers 2 and 3, and AAA…
This post summarizes gateway protocols or routing protocols on computer networks. All of them are within OSI layer 3. List of Network Routing Protocols Overall list of network routing protocols: The two main categories of network routing protocols are: Interior…
This post explains briefly what is a domain name system (DNS). Device Network Identifier Devices in a network are identified based on a different identifiers: This post explains how domain names are used using the domain name system (DNS). In…
This post lists some of the main Content Distribution Networks (CDNs). List of Content Distribution Networks (CDNs) List of Content Distributions Networks (CDNs): Cloudflare Akamai Amazon CloudFront CacheFly Lumen CDN Cloudflare Akamai Amazon CloudFront CacheFly …
This post lists some anonymity networks: Tor / Onionland Freenet I2P ZeroNet Tor / Onionland Tor network is sometimes known colloquially as “onionland” because of the onion routing technology it uses. Official website Freenet Official website I2P Official website ZeroNet…
This post summarizes the most common Virtual Private Network (VPN) protocols. List of VPN Protocols VPN (Virtual Private Network) protocols: RADIUS AAA protocol can also establish a VPN. PPTP Deprecated Point to Point Tunneling Protocol (PPTP) is a legacy solution,…
IPv6 was developed to substitute IPv4, as it was expected to run out of addresses. IPv6 Characteristics IPv6 is more business-oriented, not defense-oriented like IPv4. It increases the number of nodes. IPv6 supports quality of services natively. IPv6 has a…
Wireless network interface controllers (WNIC’s) can operate in different modes: Managed mode: the only packets that are received in the computer are the one directed to it. Promiscuous mode: it is a listening mode that exists for both wired and…