Kerry CorderoKISS IT Design Principle - Human Error Prevention
  • Home
  • About
  • Disclaimer
  • Guides and Slides
    • AWS Well-Architected Framework
    • Facebook – Running BGP in the Data Center at Scale
    • Microsoft – Experiences with BGP in Large Scale Data Centers
    • Palo Alto PCNSE Study Guide
  • IP Calculator
  • Links
  • Contact
  • See all results
Kerry Cordero
JoinedMay 2, 2023
Articles649
20+ years of experience and proven performance in large scale enterprise network infrastructure architecture, design, implementation, migration, security, operation, troubleshooting, leading/managing teams, and budgets. I have a BS in Cybersecurity and a Master's from the University of Florida.
Data CenterLaptops & DesktopsRouting & SwitchingSecurityServersWireless

SNMP Polling vs Traps

The difference between these is who is initiating the conversation. In Polling, the monitoring server is initiating the conversation asking...
Read More
Data CenterLaptops & DesktopsSecurityServers

NTP Design Stratum Numbers

I already posted about NTP in a Windows domain. I want to briefly talk about stratum numbers. I’ve been in...
Read More
Laptops & Desktops

Eve-NG MacOS Error – Could not create a new process and open a pseudo-tty.

[Command not found: telnet] [Could not create a new process and open a pseudo-tty.] When I was using my Macbook...
Read More
Data CenterRouting & Switching

Facebook – Running BGP in the Data Center at Scale

Servers

Types of HTTP Error and Status Codes

It’s important to know your HTTP error codes even if you’re a network engineer. You don’t need to memorize them...
Read More
Routing & Switching

IPv4 CIDR Blocks

  Network Bits Subnet Mask Number of Subnets Number of Hosts /8 255.0.0.0 0 16777214 /9 255.128.0.0 2 (0) 8388606...
Read More
Servers

VARs and Vendor Relationships – End of Life (EOL) Hardware in the Data Center – Hardware Life Cycle – Asset Management

Having a VAR and/or Vendor relationship is very important from a business perspective. Building that relationship is one of the...
Read More
Data CenterRouting & Switching

Microsoft – Experiences with BGP in Large Scale Data Centers

Laptops & DesktopsSecurity

Kali VMWare Error – Guest operating system ‘debian 10-64’ is not supported

If you’re getting this error: Below is the fix: While your VM is off, you need to go into your...
Read More
Security

TLS and SSL version along with Windows Disabling/Enabling Versions for IIS, SQL, .NET

Let’s first go over TLS and SSL versions....
Read More
Load More

Categories

  • Business Management
  • Cloud
  • Code
  • Data Center
  • Laptops & Desktops
  • Load Balancing
  • Routing & Switching
  • Security
  • Servers
  • Uncategorized
  • VOIP
  • Wireless

Tags

Active Directory (AD) API AWS Azure Best Practices BGP Certificates Cisco Cisco ACI Cisco ASA Cisco ASR Cisco Catalyst Cisco CLI Cisco ISE Cisco Nexus Cisco Stack DDOS Design DNS EIGRP F5 HTTP(S) IP Addressing and Subnetting Logging macOS Microsoft IIS Microsoft SQL Microsoft Windows OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS Splunk SSL Structured Cabling TLS Troubleshooting Upgrade VMWare
© 2025 cordero.me • All Rights Reserved
  • Home
  • About
  • Disclaimer
  • Guides and Slides
    • AWS Well-Architected Framework
    • Facebook – Running BGP in the Data Center at Scale
    • Microsoft – Experiences with BGP in Large Scale Data Centers
    • Palo Alto PCNSE Study Guide
  • IP Calculator
  • Links
  • Contact

Categories

  • Business Management
  • Cloud
  • Code
  • Data Center
  • Laptops & Desktops
  • Load Balancing
  • Routing & Switching
  • Security
  • Servers
  • Uncategorized
  • VOIP
  • Wireless

Tags

Active Directory (AD) API AWS Azure Best Practices BGP Certificates Cisco Cisco ACI Cisco ASA Cisco ASR Cisco Catalyst Cisco CLI Cisco ISE Cisco Nexus Cisco Stack DDOS Design DNS EIGRP F5 HTTP(S) IP Addressing and Subnetting Logging macOS Microsoft IIS Microsoft SQL Microsoft Windows OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS Splunk SSL Structured Cabling TLS Troubleshooting Upgrade VMWare
Start typing to see results or hit ESC to close
Troubleshooting Palo Alto Microsoft Windows F5 Cisco
See all results