Network & Email · page 4

Inspect service location records for supported services.

Check which certificate authorities a domain authorizes.

Check DNSSEC status and validation results where available.

Demonstrate how DNS caching affects record updates.

Compare answers returned by selected DNS resolvers.

Measure DNS lookup latency using a selected resolver.

Retrieve public IP information from a supplied address.

Validate IPv4 address notation.

Validate IPv6 address notation.

Expand compressed IPv6 addresses.

Retrieve registration information for an IP address where available.

Retrieve domain registration information from available sources.

Inspect reported domain expiration dates.

Check whether an IP appears on selected public blocklists.

Calculate subnet addresses, masks, and usable host ranges.

Summarize multiple IPv4 networks into broader CIDR blocks.

Allocate variable-length subnets according to host requirements.

Identify overlapping subnets in a network plan.

Organize IP ranges for departments, servers, and network segments.

Interpret hop-by-hop route results to a destination.

Find common services associated with port numbers.

Compare configured application ports for possible conflicts.

Visualize the steps of a TCP connection handshake.

Help choose channels based on observed nearby network congestion.