Remember IPv4
Full name: Internet Protocol version 4
Memory aid: Version four uses four decimal octets.
Private IPv4 addresses are not globally routable public addresses.
Study area: Protocols & logical ports · Batch 2
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
IPv4 — Internet Protocol version 4
Uses 32-bit network addresses.
Why learn IPv4 — Internet Protocol version 4?
Uses 32-bit network addresses.
Where it came from
Private IPv4 addresses are not globally routable public addresses.
- Memory aid (a learning cue, not the expansion): Version four uses four decimal octets.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand IPv4: Internet Protocol version 4.
- Recall this memory aid: Version four uses four decimal octets.
- Explain the practical use: Uses 32-bit network addresses.
- Explain this distinction: Private IPv4 addresses are not globally routable public addresses.
- Identify IPv4 in a device specification, architecture diagram, or system inventory.
Documentation and sources
- IETF RFC 791 (www.rfc-editor.org)