Skill Profile

DNS Deep Dive

DNS: record types, resolution, DNSSEC, DoH/DoT, CDN DNS, split-horizon

Networking & Telecom Network Protocols

Roles

where this skill appears

Levels

structured growth path

Mandatory requirements

the other 4 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
IoT Engineer		Understands DNS role in IoT: cloud service name resolution, mDNS for local discovery. Configures DNS client on IoT devices.
Network Engineer	Required	Understands DNS hierarchy: root servers, TLD, authoritative, recursive resolvers. Knows main record types (A, AAAA, CNAME, MX, TXT, SRV). Can perform dig/nslookup queries.
Telecom Developer		Understands the fundamentals of DNS Deep Dive. Applies basic practices in daily work. Follows recommendations from the team and documentation.

Role	Required	Description
IoT Engineer		Configures DNS strategies for IoT: DNS-over-TLS for security, failover DNS, caching on IoT gateway. Diagnoses DNS issues in IoT networks.
Network Engineer	Required	Configures authoritative DNS servers (BIND, PowerDNS). Implements split-horizon DNS. Diagnoses DNS problems and understands TTL, negative caching.
Telecom Developer		Independently applies DNS Deep Dive in practice. Understands trade-offs of different approaches. Solves typical tasks independently.

Role	Required	Description
IoT Engineer	Required	Designs DNS infrastructure for IoT platform: private DNS zones, DNS-based device routing, geo-DNS for multi-region IoT. Ensures DNS security (DNSSEC).
Network Engineer	Required	Designs highly available DNS infrastructure with anycast. Implements DNSSEC for zones. Configures DNS-based load balancing and health checking.
Telecom Developer	Required	Has deep expertise in DNS Deep Dive. Designs solutions for production systems. Optimizes and scales. Mentors the team.

Role	Required	Description
IoT Engineer	Required	Defines DNS strategy for IoT infrastructure. Establishes naming conventions and DNS management for large-scale IoT deployments.
Network Engineer	Required	Defines DNS architecture for the organization. Makes decisions on DNS providers (Route53, Cloudflare). Manages DNS operations. This skill is critically important for successful performance in the role.
Telecom Developer	Required	Defines DNS Deep Dive strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Role	Required	Description
IoT Engineer	Required	Defines enterprise DNS strategy for IoT. Evaluates DNS-based service discovery (Consul) and cloud-native DNS for IoT platform services.
Network Engineer	Required	Shapes DNS strategy for the platform. Researches modern DNS: DNS over HTTPS/TLS, DNSSEC adoption. Influences the organization's DNS standards.
Telecom Developer	Required	Defines DNS Deep Dive strategy at the organizational level. Establishes enterprise approaches. Mentors leads and architects.

Junior 3 requirements

IoT Engineer

Understands DNS role in IoT: cloud service name resolution, mDNS for local discovery. Configures DNS client on IoT devices.
Network Engineer
Required

Understands DNS hierarchy: root servers, TLD, authoritative, recursive resolvers. Knows main record types (A, AAAA, CNAME, MX, TXT, SRV). Can perform dig/nslookup queries.
Telecom Developer

Understands the fundamentals of DNS Deep Dive. Applies basic practices in daily work. Follows recommendations from the team and documentation.

Middle 3 requirements

IoT Engineer

Configures DNS strategies for IoT: DNS-over-TLS for security, failover DNS, caching on IoT gateway. Diagnoses DNS issues in IoT networks.
Network Engineer
Required

Configures authoritative DNS servers (BIND, PowerDNS). Implements split-horizon DNS. Diagnoses DNS problems and understands TTL, negative caching.
Telecom Developer

Independently applies DNS Deep Dive in practice. Understands trade-offs of different approaches. Solves typical tasks independently.

Senior 3 requirements

IoT Engineer
Required

Designs DNS infrastructure for IoT platform: private DNS zones, DNS-based device routing, geo-DNS for multi-region IoT. Ensures DNS security (DNSSEC).
Network Engineer
Required

Designs highly available DNS infrastructure with anycast. Implements DNSSEC for zones. Configures DNS-based load balancing and health checking.
Telecom Developer
Required

Has deep expertise in DNS Deep Dive. Designs solutions for production systems. Optimizes and scales. Mentors the team.

Lead / Staff 3 requirements

IoT Engineer
Required

Defines DNS strategy for IoT infrastructure. Establishes naming conventions and DNS management for large-scale IoT deployments.
Network Engineer
Required

Defines DNS architecture for the organization. Makes decisions on DNS providers (Route53, Cloudflare). Manages DNS operations. This skill is critically important for successful performance in the role.
Telecom Developer
Required

Defines DNS Deep Dive strategy at the team/product level. Establishes standards and best practices. Conducts reviews.

Principal 3 requirements

IoT Engineer
Required

Defines enterprise DNS strategy for IoT. Evaluates DNS-based service discovery (Consul) and cloud-native DNS for IoT platform services.
Network Engineer
Required

Shapes DNS strategy for the platform. Researches modern DNS: DNS over HTTPS/TLS, DNSSEC adoption. Influences the organization's DNS standards.
Telecom Developer
Required

Defines DNS Deep Dive strategy at the organizational level. Establishes enterprise approaches. Mentors leads and architects.

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