🌐 Computer Networks

OSI Model • TCP/IP • Routing • Socket Programming • Security • SDN

Master protocols, architectures and data communication — from LAN switching to cloud networking and network automation.

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Networking Protocols & Concepts

Beginner

🏛️

OSI Reference Model

7 layers: Physical to Application, encapsulation, PDU.

TCP/IP Protocol Suite

Link, Internet, Transport, Application layers, core protocols.

Ethernet & Switching

MAC addresses, CSMA/CD, switches, VLAN basics.

ARP (Address Resolution)

IP to MAC mapping, ARP cache, proxy ARP.

IPv4 Addressing & Subnetting

CIDR, subnet masks, VLSM, broadcast domains.

Addressing

Intermediate

🆕

IPv6 Protocol

128-bit addresses, neighbor discovery, transition mechanisms.

Routing Algorithms

Distance Vector (RIP), Link State (OSPF), Dijkstra's.

BGP (Border Gateway Protocol)

Autonomous systems, path vector, Internet routing backbone.

UDP (User Datagram Protocol)

Connectionless, low overhead, real-time media, DNS.

TCP Congestion Control

Slow start, congestion avoidance, Fast Retransmit, Tahoe/Reno, CUBIC.

TCP Flow & Error Control

Sliding window, sequence numbers, cumulative ACK, retransmission.

DNS (Domain Name System)

Hierarchical naming, resolvers, caching, DNSSEC.

HTTP/1.1, HTTP/2, HTTP/3

Methods, status codes, headers, QUIC, multiplexing.

WebSockets & Real-Time

Upgrade handshake, full-duplex, low-latency apps.

Firewalls & ACLs

Packet filtering, stateful inspection, iptables/nftables.

VPN & IPSec/TLS

Tunneling, encryption, authentication, site-to-site VPN.

DDoS Attacks & Mitigation

SYN flood, amplification, rate limiting, scrubbing centers.

Wi-Fi (802.11)

CSMA/CA, access points, channels, WPA3 security.

5G & Cellular Networks

NR architecture, massive MIMO, network slicing, latency.

Mobile

Advanced

⚙️

Software-Defined Networking (SDN)

Control plane / data plane separation, OpenFlow, ONOS.

NFV (Network Functions Virtualization)

vCPE, virtual firewalls, orchestration, ETSI NFV.

Socket Programming (Berkeley)

TCP/UDP sockets, bind, listen, accept, select/poll.

Raw Sockets & Packet Injection

Custom headers, promiscuous mode, sniffing, libpcap.

Low-level

Advanced

📊

SNMP (Simple Network Mgmt)

MIBs, OIDs, traps, network monitoring tools (Zabbix, PRTG).

NETCONF & YANG

Network configuration, declarative models, automation.

Cloud Networking (AWS VPC)

Subnets, route tables, security groups, load balancers.

Service Mesh (Istio, Linkerd)

Microservices, mTLS, traffic splitting, observability.

QoS & Traffic Shaping

DiffServ, IntServ, token bucket, queuing disciplines.

IP Multicast (IGMP, PIM)

One-to-many delivery, sparse/dense mode, SSM.

Routing

Multicast

📡 Networking Mastery Roadmap

🔰 Foundation

OSI model, IP addressing, Ethernet, basic switching, ARP

📶 Core

Routing (RIP/OSPF), TCP/UDP, DNS, HTTP, socket programming

🔥 Deep Dive

BGP, congestion control, SDN, firewalls, VPN, Wi-Fi, SNMP

🏆 Cloud & Next-Gen

5G, NFV, service mesh, cloud networking, quantum networking concepts

🔗 Connect the World, One Packet at a Time

Interactive labs, packet analysis, and network design challenges await.

Back to Home Network Services

🌐 Computer Networks

OSI Reference Model

TCP/IP Protocol Suite

Ethernet & Switching

ARP (Address Resolution)

IPv4 Addressing & Subnetting

IPv6 Protocol

Routing Algorithms

BGP (Border Gateway Protocol)

UDP (User Datagram Protocol)

TCP Congestion Control

TCP Flow & Error Control

DNS (Domain Name System)

HTTP/1.1, HTTP/2, HTTP/3

WebSockets & Real-Time

Firewalls & ACLs

VPN & IPSec/TLS

DDoS Attacks & Mitigation

Wi-Fi (802.11)

5G & Cellular Networks

Software-Defined Networking (SDN)

NFV (Network Functions Virtualization)

Socket Programming (Berkeley)

Raw Sockets & Packet Injection

SNMP (Simple Network Mgmt)

NETCONF & YANG

Cloud Networking (AWS VPC)

Service Mesh (Istio, Linkerd)

QoS & Traffic Shaping

IP Multicast (IGMP, PIM)

📡 Networking Mastery Roadmap

Related Computer Science Domains

🔗 Connect the World, One Packet at a Time