Remember IXFR
Full name: Incremental Zone Transfer
Memory aid: Incremental changes make the Zone Transfer smaller.
A server may need to fall back to a full transfer when suitable history is unavailable.
Study area: Protocols & logical ports · Batch 7
Relevant study for: CompTIA Network+ N10-009 · Cisco CCNA 200-301 · CompTIA A+ Core 1 220-1201 · CompTIA Security+ SY0-701 · ISC2 CISSP 2024 outline
Practice with exam flashcards →Networking & Connectivity / Knowledge library
IXFR — Incremental Zone Transfer
Transfers DNS zone changes relative to a prior serial version.
Why learn IXFR — Incremental Zone Transfer?
Transfers DNS zone changes relative to a prior serial version.
Where it came from
A server may need to fall back to a full transfer when suitable history is unavailable.
- Memory aid (a learning cue, not the expansion): Incremental changes make the Zone Transfer smaller.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand IXFR: Incremental Zone Transfer.
- Recall this memory aid: Incremental changes make the Zone Transfer smaller.
- Explain the practical use: Transfers DNS zone changes relative to a prior serial version.
- Explain this distinction: A server may need to fall back to a full transfer when suitable history is unavailable.
- Identify IXFR in a device specification, architecture diagram, or system inventory.
Documentation and sources
- IETF RFC 1995 (www.rfc-editor.org)