Skill Profile

TCP/IP Deep Dive

TCP/IP: network model, TCP handshake, congestion control, UDP, sockets

Networking & Telecom Network Protocols

Roles

where this skill appears

Levels

structured growth path

Mandatory requirements

the other 9 optional

Networking & Telecom

Network Protocols

3/17/2026

Choose your current level and compare expectations. The items below show what to cover to advance to the next level.

What is Expected at Each Level

The table shows how skill depth grows from Junior to Principal. Click a row to see details.

Role	Required	Description
Embedded Developer		Understands TCP/IP stack fundamentals for embedded devices. Configures basic socket communication on RTOS. Debugs network issues using packet captures and protocol analyzers.
IoT Engineer		Understands TCP/IP networking for IoT device connectivity. Works with MQTT over TCP, configures static IPs, and troubleshoots connectivity issues in constrained networks.
Network Engineer	Required	Deeply understands the TCP/IP stack: ethernet framing, IP routing, TCP three-way handshake, flow control, congestion control. Can read packet captures in Wireshark.
Telecom Developer		Understands TCP/IP protocol layers and their role in telecom infrastructure. Analyzes packet flows with Wireshark, understands QoS marking, and works with carrier-grade NAT and routing basics.

Role	Required	Description
Embedded Developer		Implements TCP/IP networking on embedded: lwIP stack configuration, socket programming, TLS integration (mbedTLS). Optimizes for constrained environments.
IoT Engineer		Applies TCP/IP optimizations for IoT: keep-alive, CoAP over UDP, DTLS. Diagnoses IoT network issues via Wireshark. Configures mDNS for device discovery.
Network Engineer	Required	Analyzes and optimizes TCP performance: MTU tuning, window scaling, Nagle algorithm, TCP BBR congestion control. Troubleshoots network latency with tcpdump and network analysis tools.
Telecom Developer		Independently applies TCP/IP Deep Dive in practice. Understands trade-offs of different approaches. Solves typical tasks independently.

Role	Required	Description
Embedded Developer		Designs embedded networking: custom TCP/IP stack tuning, zero-copy networking, connection pooling. Optimizes throughput on MCU.
IoT Engineer	Required	Designs networking stack for IoT platform: protocol selection (MQTT/CoAP/LwM2M), QoS strategies, network failover. Optimizes for unreliable networks.
Network Engineer	Required	Optimizes Linux network stack for high-performance: SO_REUSEPORT, TCP fast open, QUIC, kernel bypass (DPDK). Diagnoses complex network bottlenecks. Tunes kernel network parameters.
Telecom Developer	Required	Has deep expertise in TCP/IP Deep Dive. Designs solutions for production systems. Optimizes and scales. Mentors the team.

Role	Required	Description
Embedded Developer		Defines networking strategy for the embedded platform. Establishes TCP/IP configuration standards, security (TLS), conducts reviews.
IoT Engineer	Required	Defines networking standards for IoT platform. Establishes protocol selection guidelines. Coordinates network security and monitoring for the device fleet.
Network Engineer	Required	Defines network standards and SLAs for the platform. Makes architectural decisions on transport protocol (TCP vs QUIC). Manages network capacity planning.
Telecom Developer	Required	Defines TCP/IP Deep Dive strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Role	Required	Description
Embedded Developer		Shapes networking strategy for embedded products: TCP/IP stack selection (lwIP vs custom), TLS implementation standards, network security architecture for IoT devices in hostile environments.
IoT Engineer	Required	Defines enterprise IoT networking strategy. Evaluates 5G NB-IoT, LPWAN, TSN for industrial IoT. Builds network architecture for global IoT deployments.
Network Engineer	Required	Shapes transport strategy for the platform. Researches QUIC/HTTP3 adoption and modern transport innovations. Influences the organization's network architecture.
Telecom Developer	Required	Defines TCP/IP Deep Dive strategy at the organizational level. Establishes enterprise approaches. Mentors leads and architects.

Junior 4 requirements

Embedded Developer

Understands TCP/IP stack fundamentals for embedded devices. Configures basic socket communication on RTOS. Debugs network issues using packet captures and protocol analyzers.
IoT Engineer

Understands TCP/IP networking for IoT device connectivity. Works with MQTT over TCP, configures static IPs, and troubleshoots connectivity issues in constrained networks.
Network Engineer
Required

Deeply understands the TCP/IP stack: ethernet framing, IP routing, TCP three-way handshake, flow control, congestion control. Can read packet captures in Wireshark.

Middle 4 requirements

Embedded Developer

Implements TCP/IP networking on embedded: lwIP stack configuration, socket programming, TLS integration (mbedTLS). Optimizes for constrained environments.
IoT Engineer

Applies TCP/IP optimizations for IoT: keep-alive, CoAP over UDP, DTLS. Diagnoses IoT network issues via Wireshark. Configures mDNS for device discovery.
Network Engineer
Required

Analyzes and optimizes TCP performance: MTU tuning, window scaling, Nagle algorithm, TCP BBR congestion control. Troubleshoots network latency with tcpdump and network analysis tools.

Senior 4 requirements

Embedded Developer

Designs embedded networking: custom TCP/IP stack tuning, zero-copy networking, connection pooling. Optimizes throughput on MCU.
IoT Engineer
Required

Designs networking stack for IoT platform: protocol selection (MQTT/CoAP/LwM2M), QoS strategies, network failover. Optimizes for unreliable networks.
Network Engineer
Required

Optimizes Linux network stack for high-performance: SO_REUSEPORT, TCP fast open, QUIC, kernel bypass (DPDK). Diagnoses complex network bottlenecks. Tunes kernel network parameters.

Lead / Staff 4 requirements

Embedded Developer

Defines networking strategy for the embedded platform. Establishes TCP/IP configuration standards, security (TLS), conducts reviews.
IoT Engineer
Required

Defines networking standards for IoT platform. Establishes protocol selection guidelines. Coordinates network security and monitoring for the device fleet.
Network Engineer
Required

Defines network standards and SLAs for the platform. Makes architectural decisions on transport protocol (TCP vs QUIC). Manages network capacity planning.

Principal 4 requirements

Embedded Developer

Shapes networking strategy for embedded products: TCP/IP stack selection (lwIP vs custom), TLS implementation standards, network security architecture for IoT devices in hostile environments.
IoT Engineer
Required

Defines enterprise IoT networking strategy. Evaluates 5G NB-IoT, LPWAN, TSN for industrial IoT. Builds network architecture for global IoT deployments.
Network Engineer
Required

Shapes transport strategy for the platform. Researches QUIC/HTTP3 adoption and modern transport innovations. Influences the organization's network architecture.

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