Remember DSU
Full name: Data Service Unit
Memory aid: Data gets a Service Unit between router and circuit.
DSU and CSU functions are often combined in a CSU/DSU device.
Study area: Cables, plugs & legacy ports · Batch 7
Relevant study for: CompTIA A+ Core 1 220-1201 · CompTIA Network+ N10-009 · Cisco CCNA 200-301
Practice with exam flashcards →Networking & Connectivity / Knowledge library
DSU — Data Service Unit
Performs digital-line interfacing functions in supported WAN equipment.
Why learn DSU — Data Service Unit?
Performs digital-line interfacing functions in supported WAN equipment.
Where it came from
DSU and CSU functions are often combined in a CSU/DSU device.
- Memory aid (a learning cue, not the expansion): Data gets a Service Unit between router and circuit.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand DSU: Data Service Unit.
- Recall this memory aid: Data gets a Service Unit between router and circuit.
- Explain the practical use: Performs digital-line interfacing functions in supported WAN equipment.
- Explain this distinction: DSU and CSU functions are often combined in a CSU/DSU device.
- Identify DSU in a device specification, architecture diagram, or system inventory.
Documentation and sources
- IEEE 802 LAN/MAN standards (www.ieee802.org)
- IETF Internet standards (www.rfc-editor.org)