Fully qualified domain name
A fully qualified domain name is a complete DNS name that identifies a host, service, or other resource within the DNS hierarchy.
Acing the CCNA Exam: Volume 2 Advanced Networking and Security
A fully qualified domain name is a complete DNS name that specifies a host's location through the entire domain hierarchy.
- How it is used
- Identifies hosts globally within DNS by specifying their complete hierarchical location.
- How deep it goes
- Defines labels, root delimiting, and PQDN contrast, but does not detail DNS resolution or configuration procedures.
- Examples
- Uses www.google.com, www.business.com, and the abbreviated hostname www to contrast complete and partial names.
- What you can do after
- Evaluate whether a DNS name identifies a host completely or omits part of its hierarchy.
Acing the Certified Kubernetes Administrator Exam, Second Edition
A fully qualified domain name is a complete DNS name that uniquely identifies a host or service within the DNS hierarchy.
- How it is used
- Resolves Kubernetes Services and Pods across namespaces during cluster connectivity checks.
- How deep it goes
- Explains Service and Pod naming formats, search domains, and resolver verification, but stops short of DNS internals.
- Examples
- Uses apache-svc.default, apache-svc.default.svc.cluster.local, a Pod IP-based FQDN, curl, and /etc/resolv.conf.
- What you can do after
- Diagnose cross-namespace hostname failures by testing qualified names and inspecting a pod's DNS resolver configuration.
Related concepts
- serviceproduced by · A Kubernetes Service is an API resource that provides stable network access and service discovery for a changing set of Pods or other specified destinations.
- feature extractionused by · Feature extraction is the transformation of raw data into numerical, symbolic, or other representations that capture information useful for analysis or modeling.
- partially qualified domain namecontrasts with · A partially qualified domain name is a DNS name that omits enough hierarchy information to prevent global identification of a host.
- hostnamekind of · A hostname is a human-readable name that identifies a computer, device, service, or other host on a network and can be resolved to an address.
- Azure Container Instancesproduced by · Azure Container Instances is a Microsoft Azure service for running containers without managing virtual machines or a container orchestration cluster.
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