The author - Hazim Gaber - has years of experience designing, installing, and troubleshooting computer networks for organizations large and small.

Topic Include
-The role of network components including routers, switches, firewalls, access points, WLCs (wireless controllers)
-PoE
-Physical cabling infrastructure
-Switching logic - MAC address tables, flooding
-TCP, UDP, and ICMP
-IPv4 addressing and subnetting
-IPv6 addressing and subnetting
-Public & private IP addresses
-Wi-Fi channels, RF, SSIDs, frequencies, and wavelengths
-Network topologies, including 2-tier, 3-tier, spine-leaf, and SOHO
-WAN, MPLS, Ethernet WAN
-Virtualization
-Switch configuration
-Router configuration
-VLANs
-SSH, Telnet, Console access configuration
-CDP & LLDP configuration
-Spanning Tree Protocol (STP) and RSTP
-EtherChannel
-Wireless Architecture
-TACAS+ and RADIUS
-Routing protocols
-Static & dynamic routes
-OSPFv2
-First Hop Redundancy Protocol
-Network Address Translation (NAT)
-Classless Interdomain Routing (CIDR)
-Network Time Protocol (NTP)
-DHCP
-DNS
-SNMP
-syslog
-QoS (Quality of Service)
-Traffic shaping & policing
-FTP & TFTP
-Security threats, vulnerabilities, and exploits, & mitigation strategies
-Security program
-Access Control Lists (ACLs)
-Multi-Factor authentication & biometrics
-Site-to-Site VPNs & Remote Access
-DHCP Snooping
-ARP Inspection
-Port Security
-Authentication, Authorization, & Accounting (AAA)
-WPA, WPA2, WPA3, WEP, TKIP, EAP-TLS, LEAP, PEAP Wi-Fi Security Protocols
-Automation
-Software Defined Networks (SDNs) and Software Defined Architecture (SDAs)
-Cisco DNA (Digital Network Architecture)
-REST Based APIs
-Puppet, Chef, Ansible
-JSON