Identify, Isolate, Repair - Network Troubleshooting Tales and Tips
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Discussing network troubleshooting tips, stories, and insights including 2 troubleshooting scenarios
Brandon Hitzel
- Apr 17, 2023
- 13 min
3 Firewall Protection Techniques to Enhance Network Defenses
Three solid protection techniques you can implement on your firewall to enhance network security.
Brandon Hitzel
- Nov 1, 2022
- 26 min
Network Design: Dual ISP, DMZ, and the Network Edge
Detailed post about the network edge. Contains high and low level designs, considerations for Dual ISPs, and BGP guidance.
Brandon Hitzel
- Jun 19, 2022
- 5 min
Enterprise Wireless Design - ENWLSD Cisco Certification Study Material
An overview of the material used to study and pass the Designing Cisco Enterprise Wireless Networks ENWLSD (300-425) Network Certification
Brandon Hitzel
- Jan 16, 2022
- 11 min
Troubleshooting with Wireshark: The Case of the Gratuitous ARP
The story of a strange troubleshooting scenario where devices stop communicating inexplicably. Wireshark packet capture used for resolution.
Brandon Hitzel
- Nov 26, 2019
- 10 min
Troubleshooting with Wireshark: The Case of the TCP Challenge ACK
Troubleshooting an issue where the server replies with an ACK only instead of SYN/ACK. Also I will show a few simple Wireshark tips.
Brandon Hitzel
- Nov 23, 2019
- 2 min
Cisco IT Blog Award Finalist in "Best Analysis"
Network Defense Blog has become a finalist in the Cisco IT Blog Awards! Vote now!
Brandon Hitzel
- Jun 2, 2019
- 4 min
CCDP Certification Study Material
Cisco Certified Design Professional 300-320 study resources 2019
Brandon Hitzel
- Mar 20, 2019
- 7 min
Network Design Scenario #2: DMZ Design
This scenario covers the network Demilitarized zone or DMZ. Network segmentation is key for network defense. This post will discuss various
Brandon Hitzel
- Feb 1, 2019
- 6 min
Challenge Labs #2: Switching & Layer 2
These challenge labs cover layer 2 switching technology and protections Below I will showcase labs focused on switching which should give...
Brandon Hitzel
- Oct 23, 2018
- 5 min
Network Design Scenario #1: Redundant OSPF Point-to-MultiPoint WAN
Network design Scenario 1 will cover an OSPF Point-to-Multipoint WAN. Includes multi-area OSPF stub area design and pros and cons.
Brandon Hitzel
- Sep 28, 2018
- 6 min
Certification Comparison: SSCP vs. CCNA Security
Cisco Certified Network Associate - Security vs. ISC2 Systems Security Certified Practitioner The Cyber security industry is hot right...
Brandon Hitzel
- Sep 5, 2018
- 3 min
Challenge Labs #1: CCNA/CCNP Labs
This post contains some challenge labs to help with CCNA/CCNP or networking studying. Below I will showcase 2 labs I have used in the...
Brandon Hitzel
- Sep 1, 2018
- 3 min
Knowledge is power - lots of links
Here is a large list of technology links I have bookmarked over time. "Give a man a fish, and you feed him for a day. Teach a man to...
Brandon Hitzel
- Aug 30, 2018
- 3 min
Hello World: Internet Plumbing & Data Conservation
This is a quick introduction to my new "Network Defense Blog" Welcome So I decided to start a blog. It seems so cliche when i think about...
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