ISP Networking – Level One Course Outline

1. Introduction to ISP Networking

• What is an ISP and its role in internet connectivity
• Types of ISPs: Tier 1, Tier 2, Tier 3
• Overview of broadband, fiber, DSL, and wireless ISPs
• Key ISP services: Internet access, hosting, email, VPN

2. ISP Network Architecture

• Core network, distribution network, and access network explained
• Understanding POPs (Points of Presence) and NOCs (Network Operations Centers)
• Overview of backbone connectivity and peering arrangements
• Introduction to IP transit and bandwidth provisioning

3. IP Addressing & Subnetting for ISPs

• Public vs private IP addresses
• IPv4 and IPv6 allocation basics
• Subnetting for ISP networks (small-scale scenario)
• Dynamic Host Configuration Protocol (DHCP) for customer devices

4. Networking Devices in ISP Infrastructure

• Routers, switches, firewalls, and modems used by ISPs
• Customer Premises Equipment (CPE) overview: modems, ONTs, routers
• Optical Network Terminals (ONT) and DSLAM basics
• Wireless access points for broadband and wireless ISPs

5. ISP Services & Protocols

• Internet protocols: TCP/IP, DNS, HTTP/S, FTP, SMTP
• Dynamic routing protocols overview: BGP, OSPF (basic concepts)
• NAT (Network Address Translation) and PAT (Port Address Translation)
• Introduction to ISP caching, proxy servers, and bandwidth management

6. Customer Connectivity

• Overview of broadband connection types: DSL, Fiber, Cable, LTE/5G
• Point-to-point and shared connections
• Authentication and authorization (PPP, PPPoE)
• Basic troubleshooting of customer connectivity

7. Network Monitoring & Troubleshooting

• Key monitoring tools and metrics for ISPs
• Using ping, traceroute, and netstat for connectivity checks
• Detecting packet loss, latency, and congestion
• Reporting and escalation process for ISP issues

8. Basic ISP Security

• Firewalls and traffic filtering
• Securing customer data and preventing unauthorized access
• Introduction to DDoS mitigation basics
• ISP best practices for network reliability and uptime

9. Introduction to QoS & Traffic Management

• Bandwidth allocation and traffic prioritization
• Introduction to Quality of Service (QoS) concepts
• Rate limiting, shaping, and congestion management
• Ensuring fair usage policies for customers

10. Practical Labs & Exercises

• Assigning IP addresses for small ISP networks
• Configuring simple DHCP and NAT scenarios
• Simulating customer connections using virtual lab tools
• Basic troubleshooting scenarios (latency, packet loss, unreachable networks)

💡 Pro Tip: Hands-on experience is crucial. Beginners can use GNS3, Cisco Packet Tracer, or even cloud labs to simulate ISP networks, test routing, and troubleshoot connectivity.