Kerry Cordero

Sr Network Architect

I have been in the IT industry for 15+ years. In the beginning, I decided while I was in college to get my MCSE and CCNA. I knew I needed these to get started. I was the youngest person in the class when I took a couple of MCSE courses. I was in my teens when I got my NT4.0 MCSE. This exam was HOT, and I met people making 100k+ with their MCSE and experience. I also got my CCNA around the same time. For a while, I was doing both Microsoft and Cisco work. I ended up getting my MCSE 2003 and CCNP along with the Cisco Specialist Firewall and VPN cert years later. I started to do more and more Cisco work and loved it. I’ve been a Network Architect while working in the IT industry for over 20+ years and want to share my thoughts and experiences.


  • Cisco Certified Internetwork Expert (CCIE – R&S Written & Lab – Yes, just not on the same day 🙂 )
  • Cisco Certified Internetwork Expert (CCIE – Data Center Written)
  • Cisco Certified Network Professional (CCNP)
  • Cisco Certified Network Professional Security (CCNP – Security)
  • Cisco Certified Network Associate (CCNA)
  • Cisco Certified Network Associate Security (CCNA – Security)
  • Cisco Specialist: Firewall, VPN, and IPS
  • Microsoft Certified Systems Engineer (MCSE 4.0, 2003)
  • Microsoft Certified Systems Administrator (MCSA 2008)
  • Palo Alto Networks Certified Network Security Engineer (PCNSE)
  • 4013 Recognition National Security Agency (NSA) and the Committee on National Security Systems (CNSS)
  • 4011 Recognition National Security Agency (NSA) and the Committee on National Security Systems (CNSS)

Core Networking Skills

Networking Hardware


Cisco (ASR1000, 9000), Juniper M Series


Cisco (Nexus 9k-7k-5k-3k-2k, 6800, 6500, 3850, 3750X, 2960X)

Load Balancers / Application Network Services:

F5 LTM/GTM, Cisco CSS, Cisco ACE (Application Control Engine Module), Cisco GSS


Palo Alto, Cisco ASA / Cisco Firewall Services Module (FWSM), Checkpoint, Sonicwall, Watchguard


Security / Firewalls / Web & Email Security:

SecureAuth Two-factor authentication, SecureComputing Two-factor authentication, SSH, IPSec, VPNs, Cryptography, Key Management, AAA Model (RADIUS, TACACS+, Kerberos), Cisco CAR RADIUS Proxy, Cisco Authentication Proxy, Access Lists, IOS Firewall, 802.1x, IOS Security Features, DMZ set ups, CBAC, DoS and common threats prevention, Cisco IDS / IPS (Intrusion Detection / Prevention System), Certificate Authority (CA), PKI, Cisco Secure ACS Server, Cisco VPN Concentrator, Cisco PIX / ASA Firewall, VPN Client, Cisco Security Manager (CSM), Checkpoint, Linux IPTables, Sophos Web Appliance, WebSense, TrendMicro InterScan™ Messaging Security Suite


Cisco ISE, ForeScout


Cisco ISE, Okta





Static Routing, RIPv1, RIPv2, RIPnG, IGRP, EIGRP, OSPF, BGPv4, ODR, GRE, MPLS, IPv6, Traffic Engineering, Policy Based Routing PBR, Route Filtering, Redistribution, Summarization


Switching & Bridging:

Catalyst CatOS and IOS based Switches, VTP, STP, RSTP, Trunking, VLANs, Layer 3 Switches, Etherchannels/PortChannels, Transparent Bridging, IRB, CRB, DLSW+, MLS, VRF, VPC, VDC



Ethernet, FastEthernet, GigabitEthernet, Fiber (SC/ST/LC/SFP/OM1-4)

Network Analyzers:

Wireshark, Snort, and others

Load Generators:


WLAN (Wireless LAN)

Cisco AP’s and WLC’s


MPLS, Cloud Direct Connect (AWS and Azure)

Various Features & Services

IOS and CatOS Features, HSRP, IRDP, NAT, SNMP, SYSLOG, NTP, DHCP, CDP, DNS, HTTP, TFTP and FTP Management, IPv6 test projects, RAS Solutions, Cisco CNR (DNS & DHCP server)

QoS (Quality of Service):

WRED, Queuing features, FRTP, CAR, RTP, MLS QoS, LLQ, Policy Based Routing, CBWFQ


Sparse-Mode, Dense-Mode, Sparse-Dense-Mode, IGMP, CGMP, Rendezvous Points.

VoIP (Voice over IP) / IPT (IP Telephony):

IP Telephony utilizing Cisco routers, QoS implementation

Network Monitoring and Management Systems:

Solarwinds Orion, PRTG

Ticketing Systems:

ServiceNow, Remedy

ISP (Internet Service Provider) related:

Registry Handling with RIPE, ARIN, AP-NIC, DNS handling with various NICs

General IT Skills


PC, Laptop, and Server hardware


MS-Office Package (Word, Excel, Powerpoint, Outlook etc.), MS-Visio, Omnigraffle

Operating Systems:

Microsoft Windows and Linux

Client / Server Architecture:

Microsoft Active Directory

Server – Multiuser / Multitasking Architecture:


Server – Microsoft based:

Setup, Operation and Maintenance of WIN NT 4.0, WIN 2K, WIN 2K3/2k8/2016/2019